Water Supply System and Wastewater Treatment System Regulations

t WATER ACT WATER SUPPLY SYSTEM AND WASTEWATER TREATMENT SYSTEM REGULATIONS PLEASE NOTE This document, prepared by the Legislative Counsel Office, is an office consolidation of this regulation, current to January 25, 2025. It is intended for information and reference purposes only. This document is not the official version of these regulations. The regulations and the amendments printed in the Royal Gazette should be consulted on the Prince Edward Island Government web site to determine the authoritative text of these regulations. For more information concerning the history of these regulations, please see the Table of Regulations on the Prince Edward Island Government web site (www.princeedwardisland.ca). If you find any errors or omissions in this consolidation, please contact: Legislative Counsel Office Tel: (902) 368-4292 Email: legislation@gov.pe.ca Water Supply System and Wastewater Treatment System Regulations Table of Contents WATER SUPPLY SYSTEM AND WASTEWATER TREATMENT SYSTEM REGULATIONS Table of Contents Section Page PART 1 - INTERPRETATION 5 1. Definitions................................................................................................................................................ 5 PART 2 - CONSTRUCTION OR MODIFICATION OF FACILITIES 7 2. Requirement for permit ............................................................................................................................ 7 3. Facility not classified or system not registered ........................................................................................ 9 4. Other activities requiring a permit ........................................................................................................... 9 PART 3 - OPERATION OF FACILITIES 10 LICENCE 10 5. Licence requirement ............................................................................................................................... 10 DESIGNATION OF OPERATOR-IN-CHARGE 10 6. Operator’s certification requirement ...................................................................................................... 10 7. Exception, small water distribution facility ........................................................................................... 11 CERTIFICATION OF OPERATOR 11 8. Operator’s certificate .............................................................................................................................. 11 PART 4 - ASSESSMENTS AND CORRECTIVE ACTIONS 12 9. Assessment report every 5 years ............................................................................................................ 12 PART 5 - WATER SUPPLY SYSTEMS 14 WATER TREATMENT 14 10. Meaning of “water treatment ................................................................................................................. 14 MONITORING WATER QUALITY 15 11. Water supply quality monitoring ........................................................................................................... 15 12. Assessment of water quality monitoring results..................................................................................... 15 13. Sampling requirements - semi-public supply .......................................... Error! Bookmark not defined. 14. Sampling requirements - very small facility .......................................................................................... 16 15. Sampling requirements - free chlorine residual ..................................................................................... 16 16. Sampling requirements - part-time operation of semi-public supply ..................................................... 17 17. Analysis requirements ............................................................................................................................ 17 REPORTING AND DISCLOSURE OF INFORMATION 17 18. Report to customers ............................................................................................................................... 17 19. Reporting required for system failures ................................................................................................... 18 c t Current to: January 25, 2025 Page 3 Table of Contents Water Supply System and Wastewater Treatment System Regulations PART 6 - WASTEWATER TREATMENT SYSTEMS 18 MONITORING EFFLUENT FLOW 18 20. Flow measurement--continuous flow wastewater treatment system ...................................................... 18 EFFLUENT QUALITY STANDARDS 19 21. Point where effluent quality standards apply .......................................................................................... 19 22. Effluent quality standards ....................................................................................................................... 19 23. Exception, other standards ...................................................................................................................... 20 24. Application for permit for temporary bypass ......................................................................................... 20 MONITORING EFFLUENT QUALITY 21 25. Continuous flow, average daily rate ≥ 17,500 m3 ................................................................................... 21 26. Monitoring requirements may be condition of licence ........................................................................... 22 27. Analysis required .................................................................................................................................... 23 REPORTING AND DISCLOSURE OF INFORMATION 23 28. Reporting of analyses required ............................................................................................................... 23 29. Results may be public information ......................................................................................................... 23 SCHEDULE A 24 CLASSIFICATION OF FACILITIES 24 1. Types of facilities ................................................................................................................................... 24 2. Water distribution or wastewater collection facility classifications ....................................................... 24 3. Water or wastewater treatment classifications........................................................................................ 24 SCHEDULE B OPERATOR CERTIFICATION 30 1. Types of operator certification ............................................................................................................... 30 2. Classes of water distribution facility operator certificates ...................................................................... 30 3. Education requirements .......................................................................................................................... 30 4. Substitution of DRC experience for education ....................................................................................... 32 5. Experience requirements ........................................................................................................................ 32 TABLE 2 - MINIMUM EXPERIENCE REQUIREMENTS 32 6. Substitution of related experience .......................................................................................................... 32 7. Obtaining DRC experience ..................................................................................................................... 33 SCHEDULE C REQUIRED DRINKING WATER QUALITY MONITORING PARAMETERS 35 1. General chemical analysis ...................................................................................................................... 35 2. Detailed chemical analysis, substances .................................................................................................. 35 SCHEDULE E 38 1. Standards ................................................................................................................................................ 38 Page 4 Current to: January 25, 2025 t c PART 1 - INTERPRETATION Water Supply System and Wastewater Treatment System Regulations Section 1 WATER ACT CHAPTER W-1.1 WATER SUPPLY SYSTEM AND WASTEWATER TREATMENT SYSTEM REGULATIONS Pursuant to section 76 of the Water Act R.S.P.E.I. 1988, Cap. W-1.1, Council made the following regulations: PART 1 - INTERPRETATION 1. Definitions (1) In these regulations (a) “Act” means the Water Act R.S.P.E.I. 1988, Cap. W-1.1; (b) “acutely lethal”, in relation to effluent, means that the effluent at 100% concentration kills more than 50% of the rainbow trout subjected to it during a 96- hour period; (c) “alternative wastewater treatment facility” means a wastewater treatment facility that does not discharge wastewater directly into a watercourse, and discharges effluent at a rate that exceeds 22.7 m3/day; (d) “carbonaceous biochemical oxygen demand (cBOD5)” means carbonaceous matter that consumes, by biochemical oxidation, oxygen dissolved in water; (e) “Chief Public Health Officer” means the Chief Public Health Officer appointed under the Public Health Act R.S.P.E.I. 1988, Cap. P-30.1; (f) “contact hour” means a fifty-minute classroom instruction session, or its equivalent as determined by the Minister; (g) “continuing education unit” means 10 hours of participation in a continuing education program recognized by the Minister; (h) “continuous flow wastewater treatment facility” means a wastewater treatment facility other than an intermittent treatment wastewater facility; (i) “detailed chemical analysis”, in relation to a water quality sample, means an analysis conducted in accordance with section 2 of Schedule C; (j) “direct responsible charge experience” or “DRC experience” means experience as an operator having direct responsibility for, and charge of, a process that controls the effectiveness or efficiency of a facility; (k) “effluent” means wastewater that is discharged from a wastewater treatment facility; c t Current to: January 25, 2025 Page 5 PART 1 - INTERPRETATION Section 1 Water Supply System and Wastewater Treatment System Regulations (l) “Effluent Regulatory System (ERRIS)” means the information system maintained by the Government of Canada for the purpose of receiving reports required under the Fisheries Act (Canada) Wastewater System Effluent Regulations; (m) “engineer” means a person who is authorized to practise professional engineering in the province; (n) “facility” means a water treatment facility, water distribution facility, wastewater treatment facility or wastewater collection facility; (o) “facility classification certificate” means a valid facility classification certificate issued pursuant to section 2 or 3 or the preceding regulations; (p) “general chemical analysis”, in relation to a water quality sample, means an analysis conducted in accordance with section 1 of Schedule C; (q) “Guidelines for Canadian Drinking Water Quality” means the recommendations for drinking water quality published by Health Canada in February 2017, as amended from time to time; (r) “hydraulic retention time”, in relation to a wastewater treatment facility, means the average period during which wastewater is retained for treatment within the wastewater treatment facility; (s) “intermittent wastewater treatment facility” means a wastewater treatment facility with a hydraulic retention time of at least 90 days that deposits effluent through its final discharge point during, at most, four periods per calendar year, each of which is separated from every other period by at least seven clear days during which no deposit occurs; (t) “licence” means a licence to operate a facility issued by the Minister under subsection 5(2); (u) “modification” means the addition or elimination of a structure or equipment to or from a facility, which does not change the purpose or function of the facility; (v) “operator” means a person who directs, adjusts, inspects, tests or evaluates an operation or a process that controls the effectiveness or efficiency of a facility; (w) “operator-in-charge” means a person designated as an operator-in-charge pursuant to subsection 6(1) or (2), section 7 or the preceding regulations, who has direct responsibility for, and charge of, the overall operation, repair and maintenance of a facility; (x) “operator’s certificate” means a valid certificate of qualification issued by the Minister under section 8 or the preceding regulations; (y) “owner” means a person who owns, operates or maintains a facility or a semi-public drinking water supply; (z) “preceding regulation” means the Environmental Protection Act Drinking Water and Wastewater Facility Operating Regulations (EC710/04); (aa) “primary disinfection” means a process that is intended to reduce the occurrence of microbiological organisms in drinking water prior to the water entering a water distribution facility; (bb) “Procedure for pH Stabilization EPS 1/RM/50” means the Procedure for pH Stabilization During the Testing of Acute Lethality of Wastewater Effluent to Rainbow Trout (EPS 1/RM/50), March 2008, published by the federal Department of the Environment, as amended from time to time; (cc) “Reference Method EPS 1/RM/13” means the Biological Test Method: Reference Method for Determining Acute Lethality of Effluents to Rainbow Trout (EPS 1/RM/13 Second Edition), December 2000, with May 2007 and February 2016 Page 6 Current to: January 25, 2025 t c PART 2 - CONSTRUCTION OR MODIFICATION OF FACILITIES Water Supply System and Wastewater Treatment System Regulations Section 2 amendments, published by the federal Department of the Environment, as amended from time to time; (dd) “secondary disinfection” means the maintenance of a disinfectant in a water distribution facility for the purpose of controlling microbial growth within the water distribution facility; (ee) “semi-public drinking water supply” means a water supply that supplies drinking water to fewer than five households; (ff) “Standards Council of Canada” means the corporation established by the Standards Council of Canada Act (Canada); (gg) “total residual chlorine” means the sum of free chlorine and combined chlorine, including inorganic chloramines; (hh) “total suspended solids (TSS)” means any solid matter contained in effluent that is retained on a filter of 2.0 micrometre (μm) or smaller pore size; (ii) “wastewater collection facility” means a facility that is a component of a wastewater treatment system, used for the collection or transmission of wastewater; (jj) “wastewater treatment facility” means a facility that is a component of a wastewater treatment system, used for the treatment and disposal of wastewater; (kk) “water distribution facility” means a facility that is a component of a water supply system, used for the production, collection, storage and transmission of drinking water; (ll) “water treatment facility” means a facility that is a component of a water supply system, used for the treatment of drinking water, but does not include water treatment equipment used in private residences or a bottled water treatment facility. Schedules form part of regulations (2) For greater certainty, Schedules A, B, C, D and E to these regulations form part of these regulations. (EC505/21) PART 2 - CONSTRUCTION OR MODIFICATION OF FACILITIES 2. Requirement for permit (1) Subject to subsection (2), a permit issued pursuant to this section is required to construct or modify a facility. Exception (2) The Minister may waive the requirement for a permit under subsection (1), but not the requirements under subsection (5), to undertake a water or sewer main line extension or replacement not exceeding 150 metres in length, including up to two new sewer manholes or hydrant or valve installations within the 150 metres of pipe, where (a) standard specifications and procedures, acceptable to the Minister, have been developed for the work; and (b) an engineer employed by the owner of the facility is overseeing the undertaking. Application (3) An engineer may apply for a permit to construct or modify a facility by submitting to the Minister a design package that contains c t Current to: January 25, 2025 Page 7 PART 2 - CONSTRUCTION OR MODIFICATION OF FACILITIES Section 2 Water Supply System and Wastewater Treatment System Regulations (a) the name and contact information of the developer and legal owner of the land where the facility will be constructed; (b) the name of the municipality and utility, if applicable; (c) the name and contact information of the design engineer; (d) engineered, stamped design drawings and a design summary completed and signed by an engineer; and (e) an itemized estimate of the project cost including construction, contingency and engineering. Issuance of permit (4) On receipt of an application made in accordance with subsection (3), the Minister may issue a permit to construct or modify a facility, where the Minister is satisfied that (a) the proposed design of the facility is appropriate for the purpose for which it is intended and is capable of meeting the water quality or effluent quality standards required by these regulations; and (b) the fee set out in Schedule D has been paid. Completion requirements (5) After substantially completing the construction or modification of a facility authorized by a permit, or an undertaking referred to in subsection (2), the permit holder or engineer overseeing the undertaking, as the case may be, shall submit, or ensure the submission of, to the Minister, (a) within 180 days of substantial completion, record drawings of the work completed, prepared in a manner satisfactory to the Minister; and (b) within 30 days of substantial completion, a letter of substantial completion, signed by an engineer, containing the following information: (i) the name of the general contractor responsible for completing the project, (ii) the date of substantial completion of the work, (iii) a list of any deficiencies or departures from the design for the project for which approval was granted, (iv) the permit number, and (v) any other information required by the Minister. Classification of new facility and registration of system (6) On receipt of the documents prepared in accordance with subsection (5) in respect of a newly constructed facility, the Minister shall (a) classify the facility in accordance with Schedule A and issue a facility classification certificate to the owner of the facility; and (b) where the facility is a component of a water supply system or water treatment system that has not been registered, register and assign a registration number to the system. Reclassification of facility (7) On receipt of the documents prepared in accordance with subsection (5) in respect of a facility that has been modified, the Minister shall consider the classification of the facility and, where necessary, (a) re-classify the facility in accordance with Schedule A; and (b) issue a new facility classification certificate to the owner of the facility. Page 8 Current to: January 25, 2025 t c PART 2 - CONSTRUCTION OR MODIFICATION OF FACILITIES Water Supply System and Wastewater Treatment System Regulations Section 3 Validity of certificate (8) A facility classification certificate is valid unless or until it is revoked or replaced by the Minister. (EC505/21) 3. Facility not classified or system not registered (1) Where a facility has not been classified or a water supply system or wastewater treatment system has not been registered under section 2 or the preceding regulations (a) the owner of the facility or system, as the case may be, may apply to the Minister, in the form required by the Minister, for the classification of the facility or registration of the system, as the case may be; or (b) the Minister may require the owner of the facility or system, as the case may be, to provide to the Minister any information requested by the Minister to classify the facility or register the system, as the case may be. Classification or registration (2) On receipt of the application or information requested under subsection (1), the Minister shall classify the facility in accordance with Schedule A and issue a facility classification certificate to the owner of the facility or register and assign a registration number to the system, as the case may be. (EC505/21) 4. Other activities requiring a permit (1) A permit issued under this section is required to undertake any of the following activities: (a) the removal, temporary storage or final disposition of sludge from a wastewater treatment facility; (b) activities that may reasonably be expected to disrupt the operation of a water supply system or wastewater treatment system to the extent that water quality in a water distribution facility or effluent quality from a wastewater treatment facility may not meet the standards required by these regulations. Application (2) The owner of a water supply system or wastewater treatment system, as the case may be, may apply to the Minister, in the form required by the Minister, for a permit to undertake an activity described in subsection (1). Issuance of permit (3) On receipt of an application made in accordance with subsection (2), the Minister may issue a permit to undertake an activity described in subsection (1), where the Minister is satisfied that (a) the activity will not cause an adverse effect; and (b) the fee set out in Schedule D has been paid. Permit not required for maintenance (4) For greater certainty, the following activities undertaken by the owner of a water supply system or wastewater treatment system shall be considered maintenance and shall not require a permit: (a) the repair of broken water mains or sewer lines, fittings or valves; (b) the installation of service connections including service taps; (c) the maintenance and replacement of equipment. (EC505/21) c t Current to: January 25, 2025 Page 9 PART 3 - OPERATION OF FACILITIES Section 5 Water Supply System and Wastewater Treatment System Regulations PART 3 - OPERATION OF FACILITIES Licence 5. Licence requirement (1) A licence is required to operate a facility. Issuance of licence (2) On the issuance of a facility classification certificate or on receipt of an application in the form required by the Minister, the Minister may issue to the owner of a facility a licence to operate the facility, if the Minister is satisfied that (a) the facility has been classified and a facility classification certificate has been issued in respect of the facility, in accordance with Part 2; (b) the water supply system or wastewater treatment system of which the facility is a component has been registered and assigned a registration number, in accordance with Part 2; (c) the owner has designated an operator-in-charge who holds an operator’s certificate to operate that type of facility, at a classification level that equals or exceeds the classification level of the facility, in accordance with sections 6 and 7; and (d) the fee set out in Schedule D has been paid. Licence valid five years (3) A licence shall be valid for a period of five years after the date it is issued or renewed unless sooner suspended or revoked. Renewal of licence (4) On receipt of an application in the form required by the Minister, the Minister may renew a licence if the Minister is satisfied that (a) the facility is classified appropriately, in accordance with Schedule A; (b) the owner has designated an operator-in-charge who holds an operator’s certificate to operate that type of facility, at a classification level that equals or exceeds the classification level of the facility, in accordance with sections 6 and 7; and (c) the fee set out in Schedule D has been paid. (EC505/21) Designation of Operator-in-Charge 6. Operator’s certification requirement (1) The owner of a facility for which a facility classification certificate has been issued, shall designate, as the operator-in-charge of the facility, an operator who meets the requirements of subsection (3), and provide that operator’s name and contact information to the Minister. Alternate operator-in-charge (2) When a designated operator-in-charge is not available for active charge of the facility, the owner or operator shall immediately designate an alternate operator-in-charge and provide that operator’s name and contact information to the Minister. Level of classification required (3) To act as the operator-in-charge of a facility, a person shall hold Page 10 Current to: January 25, 2025 t c PART 3 - OPERATION OF FACILITIES Water Supply System and Wastewater Treatment System Regulations Section 7 (a) an operator’s certificate to operate that type of facility at a classification level that equals or exceeds the classification level assigned to the facility; or (b) a valid temporary permit issued under subsection (4). Temporary permit (4) Where a facility is re-classified to a classification level greater than the classification level of the operator-in-charge of the facility, the Minister may issue a temporary permit to the operator-in-charge that authorizes him or her to act as the operator-in-charge of the facility for the period specified in the permit. (EC505/21) 7. Exception, small water distribution facility Notwithstanding section 6, the owner of a water distribution facility, classified in accordance with Schedule A as a very small water distribution facility, may designate as the operator-in- charge of the facility a person who holds (a) a valid certificate of qualification or permit in the plumbing trade issued under the Apprenticeship and Trades Qualification Act R.S.P.E.I. 1988, Cap. A-15.2; and (b) a valid plumbing contractor’s licence issued under the Environmental Protection Act A Code for Plumbing Services Regulations (EC666/86), and that person may act as the operator-in-charge of the facility. (EC505/21) Certification of Operator 8. Operator’s certificate (1) A person may apply to the Minister, in the form required by the Minister, for an operator’s certificate of a type and class set out in Schedule B. Issuance of operator’s certificate (2) On receipt of an application in accordance with subsection (1), the Minister may issue a particular type and class of operator’s certificate to an applicant who (a) meets the education and experience requirements, whether directly or through permitted substitutions, set out in Schedule B for that type and class of operator’s certificate; (b) pays the examination fee set out in Schedule D and successfully completes an examination approved by the Minister; and (c) pays the fee for an operator’s certificate set out in Schedule D. Certification outside the province (3) Notwithstanding subsection (2), the Minister may issue an operator’s certificate to an applicant who (a) has been certified in another jurisdiction in a manner the Minister considers equivalent to a type and class of operator certification set out in Schedule B, by a certifying agency recognized by the Minister; and (b) pays the fee for an operator’s certificate set out in Schedule D. Duration (4) Subject to subsection (7), an operator’s certificate is valid for four years from the date of issuance. c t Current to: January 25, 2025 Page 11 PART 4 - ASSESSMENTS AND CORRECTIVE ACTIONS Section 9 Water Supply System and Wastewater Treatment System Regulations Renewal of operator’s certificate (5) On receipt of an application, in the form required by the Minister, and on payment of the fee set out in Schedule D, the Minister may renew an operator’s certificate if the Minister is satisfied that, (a) where the application is to renew a small water distribution facility operator’s certificate or a simple industrial wastewater treatment facility operator’s certificate, the applicant has attended at least one training session, approved by the Minister, since the date the operator’s certificate was last issued or renewed; (b) where the application is to renew a Class I or Class II operator’s certificate, the applicant has successfully completed at least 2.4 continuing education units since the date the operator’s certificate was last issued or renewed; or (c) where the application is to renew a Class III or Class IV operator’s certificate, the applicant has successfully completed at least 4.8 continuing education units since the date the operator’s certificate was last issued or renewed. Certificate invalid (6) Where an operator ceases to be employed, at the type and class of facility for which the operator holds an operator’s certificate, for a period of three years, the certificate shall be considered invalid. Application for reinstatement (7) Where an operator’s certificate is considered invalid under subsection (6), the former certificate holder may apply to the Minister, in the form required by the Minister, to have the operator’s certificate reinstated. Reinstatement (8) On receipt of an application in accordance with subsection (7), the Minister may reinstate the operator’s certificate, if the applicant (a) pays the examination fee set out in Schedule D and successfully completes an examination approved by the Minister; and (b) pays the fee for an operator’s certificate set out in Schedule D. Disclosure of certification information (9) The Minister may make available to the public, in the form and through the means the Minister believes is appropriate, the name and type and class of certification of an operator. (EC505/21; 54/25) PART 4 - ASSESSMENTS AND CORRECTIVE ACTIONS 9. Assessment report every 5 years (1) The owner of a municipal water supply system or a municipal wastewater treatment system shall conduct a detailed assessment of all components of any facilities under its control and submit an assessment report on the status of the system to the Minister at least once every five years. Assessment report (2) The assessment report submitted in accordance with subsection (1) shall be reviewed and signed by an engineer who has experience in wastewater treatment or water supply, as the case may be. Page 12 Current to: January 25, 2025 t c PART 4 - ASSESSMENTS AND CORRECTIVE ACTIONS Water Supply System and Wastewater Treatment System Regulations Section 9 Assessment report, municipal water supply system (3) For municipal water supply systems, the assessment and content of the assessment report shall include (a) a review of the sampling frequency conducted over the past five-year period in comparison with the minimum sampling requirements established under these regulations; (b) a review of water quality results of untreated water from production wells and water in the water distribution facility and a comparison of the finished water quality with the recommendations in the Guidelines for Canadian Drinking Water Quality; (c) the age and condition of the water supply and distribution infrastructure owned or operated by the utility; (d) an assessment of any changes in the extent of the water distribution facility or in water demand by customers in comparison with system capacity; and (e) any additional information the Minister may require. Assessment report, municipal wastewater treatment system (4) For municipal wastewater treatment systems, the assessment and content of the assessment report shall include (a) a review of the sampling frequency conducted over the past five-year period in comparison with the minimum sampling requirements established under these regulations; (b) a review of the effluent quality results in comparison with the effluent standards prescribed in these regulations; (c) an assessment of any changes in the influent wastewater flows or influent wastewater quality in comparison with system hydraulic or treatment capacity; and (d) the age and condition of wastewater collection or treatment infrastructure owned or operated by the utility. Assessment report for non-municipal system (5) The Minister may require an assessment of the status of a water supply system or a wastewater treatment system that is not a municipal system, as part of the approval process for an application for a permit to construct or modify a facility, or for the purpose of confirming or updating the classification of the facility. Assessment report to address concerns (6) The Minister may request an assessment of the performance or safety of a water supply system or a wastewater treatment system, or any facility that constitutes a component of that system, at any time the Minister has reason to believe that (a) the system or facility is at risk of failing to meet water quality or effluent quality standards; or (b) the conditions or circumstances that relate to the effect of the system on human or animal health or on water resources have changed sufficiently. Scope and conduct of assessment (7) Where the Minister has required or requested an assessment of a water supply system or wastewater treatment system for a reason indicated in subsection (5) or (6), the scope of the assessment shall be determined by the Minister and shall be conducted at the expense of the owner of the water supply system or wastewater treatment system. c t Current to: January 25, 2025 Page 13 PART 5 - WATER SUPPLY SYSTEMS Section 10 Water Supply System and Wastewater Treatment System Regulations Who may conduct assessment (8) Unless otherwise authorized by the Minister, an assessment referred to in subsection (5) or (6) shall be conducted or reviewed, and signed, by an engineer. Plan may be required (9) Where an assessment of a water supply system or a wastewater treatment system indicates that the system is, or is at risk of, failing to meet water quality or effluent quality standards under these regulations, the Minister shall require the owner of the system to submit a plan for approval, within a specified time limit, to address the issues identified in the assessment, including actions proposed to be taken to address system deficiencies, the rationale for the actions and timelines for completion of the actions indicated in the plan. Permit required (10) Where a plan referred to in subsection (9) proposes to modify a facility, despite the approval of the plan, a permit to modify the facility issued under Part 2 is still required. Licence amended (11) Where the Minister approves a plan referred to in subsection (9) that involves a change in the way in which a facility is operated, the Minister shall amend any conditions respecting the operation of the facility on the licence to operate the facility accordingly. Grounds to refuse permit or licence (12) The results of an assessment of a water supply system or wastewater treatment system that indicate that the system is, or is at risk of, failing to meet water quality or effluent quality standards under these regulations may be grounds for the Minister to refuse an application for a permit to construct or modify a facility in the system, or an application for a licence to operate a facility in the system. (EC505/21) PART 5 - WATER SUPPLY SYSTEMS Water Treatment 10. Meaning of “water treatment (1) For the purpose of this section, “water treatment” includes the use of a water treatment device or devices or processes for the purpose of reducing the number of microbiological pathogens in water or reducing or altering the concentration of chemical constituents in water before the water enters a water distribution facility. Standards to be met (2) Unless otherwise approved by the Minister, no person shall install a water treatment device, or use a water treatment additive, intended to treat water entering a water distribution facility unless the device or additive is certified to the standards described in Schedule E. Primary disinfection requirement - very small and small facilities (3) A person who owns or operates a water distribution facility classified in Schedule A as a very small or a small water distribution facility shall employ primary disinfection to achieve a minimum of a 0.5-log reduction of viruses, prior to distribution to the first customer. Page 14 Current to: January 25, 2025 t c PART 5 - WATER SUPPLY SYSTEMS Water Supply System and Wastewater Treatment System Regulations Section 11 Primary disinfection requirements - Class I, II, III or IV facility (4) Subject to subsection (5), a person who owns or operates a Class I, II, III or IV water distribution facility shall employ primary disinfection to achieve a minimum of a 4-log reduction of viruses, prior to distribution to the first customer. Exception may be permitted (5) Where, because of insufficient contact time between water and a disinfectant, it is not possible to provide a 4-log reduction of viruses for water supplied to any of the customers served by a water distribution facility, the owner or operator of the water distribution facility may, with the written approval of the Minister, provide, own and maintain point of entry devices for the purpose of providing a 4-log reduction of viruses to those customers. Procedure related to credit (6) The determination of the required level of disinfection for the reduction of viruses referred to in subsections (4) and (5) shall be made according to the procedure described in Schedule E. Free chlorine residual requirement - Class I, II, III or IV facility (7) No person shall own or operate a Class I, II, III or IV water distribution facility that does not maintain a free chlorine residual between 0.2 and 2 mg/L throughout the facility, as measured at compliance points approved by the Minister. Removal of chemical constituents (8) Any requirement for water treatment for the removal of chemical constituents shall be determined by the Minister on a case-by-case basis, and may be included as a condition of the licence to operate the water distribution facility. Plan to meet requirements may be required (9) Where, at the time of the coming into force of these regulations, a water supply system does not meet the treatment requirements specified in these regulations, the Minister shall direct the owner or operator of the system to develop, and submit for approval, a plan to meet the treatment requirements, including the specific steps to be taken and the time line for their implementation. (EC505/21) Monitoring Water Quality 11. Water supply quality monitoring All water supply systems and semi-public drinking water supplies shall be monitored for water quality. (EC505/21) 12. Assessment of water quality monitoring results The assessment of water quality monitoring results under this Part shall be based on the recommendations in the Guidelines for Canadian Drinking Water Quality, or, where no such guidelines exist, on the advice of the Chief Public Health Officer. (EC505/21) 13. Sampling requirements - semi-public supply Subject to subsection 16(1), the owner of a semi-public drinking water supply shall ensure that water quality samples are c t Current to: January 25, 2025 Page 15 PART 5 - WATER SUPPLY SYSTEMS Section 14 Water Supply System and Wastewater Treatment System Regulations (a) collected and analysed for the presence of coliform bacteria and E. coli at least once each year; (b) collected from each source of supply and subjected to a general chemical analysis at least once every three years; and (c) collected and analysed as ordered by the Minister. (EC505/21; 54/25) 14. Sampling requirements - very small facility (1) Subject to subsection 16(2), the owner of a water distribution facility classified in accordance with Schedule A as a very small water distribution facility shall ensure that water quality samples are (a) collected from each source of supply, and from at least one site within the water distribution facility, and analysed for the presence of coliform bacteria and E. coli at least once per quarter each year; and (b) collected from each source of supply and subjected to a general chemical analysis at least once every three years. Sampling requirements - small facility (2) Subject to subsection 16(2), the owner of a water distribution facility classified in accordance with Schedule A as a small water distribution facility shall ensure that water quality samples are (a) collected from each source of supply, and from at least two sites within the water distribution facility, and analysed for the presence of coliform bacteria and E. coli at least once per quarter each year; and (b) collected from each source of supply and subjected to a general chemical analysis at least once every three years. (EC505/21) 15. Sampling requirements - free chlorine residual The owner of a water distribution facility classified in accordance with Schedule A as a Class I, II, III or IV water distribution facility shall ensure that (a) at least four water quality samples per month, or, where the population served exceeds 5,000, one water quality sample per month for every 1,000 persons served are collected from the water distribution facility and analyzed for the presence of coliform bacteria and E. coli, with the intervals between sampling not exceeding two weeks; (b) at least one water quality sample per month is collected from each source of supply and analyzed for the presence of coliform bacteria and E. coli; (c) at least one water quality sample per year is collected from each source of supply and at least two locations in the water distribution facility and subjected to a general chemical analysis; (d) at least one water quality sample every three years is collected from each source of supply and at least two locations in the water distribution facility and subjected to a detailed chemical analysis; (e) at least one measurement per week is made of the disinfection residual at representative points within the water distribution facility, and the results are recorded and available for inspection by the Minister; and (f) any other water quality sampling requirements as directed by the Minister are met. (EC505/21) Page 16 Current to: January 25, 2025 t c PART 5 - WATER SUPPLY SYSTEMS Water Supply System and Wastewater Treatment System Regulations Section 16 16. Sampling requirements - part-time operation of semi-public supply (1) Where a semi-public drinking water supply is not operated year round, the owner shall ensure that, prior to resuming operations, water quality samples are collected and analysed for the presence of coliform bacteria and E. coli. Sampling requirements - part-time operation of very small or small facility (2) Where a water distribution facility classified in accordance with Schedule A as a very small or a small water distribution facility is not operated year round, the owner shall ensure that, prior to resuming operations, water quality samples are collected from each source of supply and at least two sites within the water distribution facility and analysed for the presence of coliform bacteria and E. coli. (EC505/21) 17. Analysis requirements (1) The owner of a water supply system or a semi-public drinking water supply shall ensure that water quality samples collected in accordance with these regulations are analysed by a laboratory accredited by the Standards Council of Canada or by an accreditation body approved by the Minister. Submission of certain results (2) Where a water quality sample is analysed by a laboratory other than the PEI Analytical Laboratories, the owner shall submit the results of the analysis to the Minister within five business days of the receipt of the analysis. Notification of certain results (3) Where a water quality sample is analysed by a laboratory other than the PEI Analytical Laboratories and the results of the analysis indicate the presence of E. coli, the owner shall notify the Minister immediately by telephone, facsimile or electronically. (EC505/21) Reporting and Disclosure of Information 18. Report to customers (1) The owner of a water supply system shall report, in summary form, the results of water quality analyses conducted in accordance with these regulations to the customers of the system and the Minister, at least once a year. Maintenance of records (2) The owner of a water supply system or semi-public drinking water supply shall ensure that a record of all water quality analyses conducted in accordance with these regulations is maintained for a period of at least five years. Sample results (3) The results of the analyses of water samples collected by the owner or operator of a water supply system from a source of supply or a water distribution facility in accordance with these regulations shall be submitted to the Minister and, at the Minister’s discretion, may be made available to the public in the form and through the means the Minister believes is appropriate. c t Current to: January 25, 2025 Page 17 PART 6 - WASTEWATER TREATMENT SYSTEMS Section 19 Water Supply System and Wastewater Treatment System Regulations Reports are public information (4) Any reports submitted to the Minister in accordance with these regulations may, at the Minister’s discretion, be made available to the public in the form and through the means the Minister believes is appropriate. (EC505/21) 19. Reporting required for system failures The owner or operator of a water supply system shall report to the Minister, (a) within 24 hours of receipt by the owner or operator, the results of a drinking water analysis of water in the water distribution facility, conducted by a laboratory other than the PEI Analytical Laboratories, where total coliform bacteria exceeds 10 cfu/100 mls, or any E. coli or faecal coliform organisms are detected; (b) within five business days of receipt by the owner or operator, the results of a drinking water analysis of water in the water distribution facility, conducted by a laboratory other than the PEI Analytical Laboratories, where a chemical parameter exceeds a Maximum Acceptable Concentration (MAC) or an Aesthetic Objective (AO) as recommended in the Guidelines for Canadian Drinking Water Quality; (c) immediately, all cases where equipment failure or another cause has or may have compromised the effectiveness of primary or secondary disinfection of water entering or in a water distribution facility; (d) immediately, any case where a break in a water main has caused depressurization of a portion of a water distribution facility or it is necessary to depressurize a portion of a water distribution facility in order to undertake repairs to a water main, and the location of the break is buried underground or is submerged in water. PART 6 - WASTEWATER TREATMENT SYSTEMS Monitoring Effluent Flow 20. Flow measurement--continuous flow wastewater treatment system (1) The owner of a continuous flow wastewater treatment system that has a hydraulic retention time of less than 15 days or that discharges effluent to a watercourse at an average daily rate of 2500 m3 or more, shall ensure the effluent flow is measured using a device that has a margin of error of less than 15% of the actual effluent flow, and shall record the measurement daily. Maintain flow measuring device (2) The owner of a continuous flow wastewater treatment system shall maintain the flow measuring device referred to in subsection (1), at all times, as recommended by the manufacturer. Alternate method may be approved (3) Subject to subsection (4), the owner of a continuous flow wastewater treatment system that has a hydraulic retention time of 15 days or greater may provide the Minister with an estimation of daily flow using a method approved by the Minister, or may measure effluent flow using the device described in subsection (1). Page 18 Current to:

January 25, 2025 t c PART 6 - WASTEWATER TREATMENT SYSTEMS Water Supply System and Wastewater Treatment System Regulations Section 21 Alternate method no longer permitted (4) Five years after the date this section comes into force, subsection (3) shall cease to have effect and the requirements of subsections (1) and (2) shall apply in respect of measuring the effluent flow of a continuous flow wastewater treatment system that has a hydraulic retention time of 15 days or greater. Requirements for certain facilities (5) The owner of an alternative wastewater treatment facility or a facility treating wastewater from an industrial source shall ensure effluent flows are measured and recorded as directed by the Minister as a condition of the licence to operate the facility. (EC505/21) Effluent Quality Standards 21. Point where effluent quality standards apply (1) Effluent quality standards apply at the end of the discharge pipe, at the point where the effluent is introduced into a watercourse or into or on the ground. In case of man-made wetland (2) Where a wastewater treatment facility uses a man-made wetland as the final part of the wastewater treatment process, the outfall from the wetland shall be considered to be the end of the discharge pipe. (EC505/21) 22. Effluent quality standards (1) Subject to sections 23 and 24, no owner of a wastewater treatment facility shall discharge or permit the discharge of the following to a watercourse: (a) effluent that has been determined to be acutely lethal, with acute lethality of the effluent being determined using (i) the procedure set out in section 5 or 6 of Reference Method EPS 1/RM/13, or (ii) the Procedure for pH Stabilization EPS 1/RM/50; (b) effluent that has an average concentration of total suspended solids (TSS) or non- filterable solids that exceeds 25 mg/L, determined in accordance with subsections (2) and (3); (c) effluent that has an average concentration of carbonaceous biochemical oxygen demand (cBOD5) that exceeds 25 mg/L; (d) effluent that has a maximum concentration of un-ionized ammonia in the effluent that exceeds 1.25 mg/L, expressed as nitrogen (N) at 15oC ± 1oC as determined when the temperature of the sample has been adjusted to 15°C ± 1°C prior to analysis of Total Ammonia and pH, by the following formula: Un-ionized ammonia = total ammonia x 1 1+109.56 - pH Where Total Ammonia is the concentration of un-ionized ammonia (NH ) plus ionized 3 ammonia (NH +) expressed in mg/L; 4 (e) effluent that has a maximum total chlorine residual that exceeds 0.02 mg/L; (f) where the wastewater treatment facility uses an ultra-violet light disinfection system to disinfect effluent, (i) effluent that has a geometric mean concentration of faecal coliform organisms exceeding 200 MPN per 100 mls for the most recent 5 samples, or c t Current to: January 25, 2025 Page 19 PART 6 - WASTEWATER TREATMENT SYSTEMS Section 23 Water Supply System and Wastewater Treatment System Regulations (ii) effluent that has a concentration of faecal coliform organisms exceeding 400 MPN per 100 mls for any individual grab sample; (g) where the wastewater treatment facility uses a holding pond for the disinfection of wastewater effluent, (i) effluent that has a the geometric mean concentration exceeding 1000 MPN per 100 mls of faecal coliform organisms for the last five samples, or (ii) effluent that has a concentration of faecal coliform organisms exceeding that specified by the Minister. Determination of averages (2) Subject to subsection (3), the average concentration referred to in clauses (1)(b) and (c) and the maximum concentration referred to in clauses (1)(d) and (e) shall be determined (a) each calendar year, if the average daily volume of effluent deposited via the final discharge point during the previous calendar year was (i) less than or equal to 17,500 m3, for an intermittent wastewater system, or (ii) less than or equal to 2,500 m3, for a continuous wastewater system with a hydraulic retention time of five or more days; (b) each quarter, if the average daily volume of effluent deposited via the final discharge point during the previous calendar year was (i) greater than 2,500 m3 and less than or equal to 17,500 m3, for a continuous wastewater system with a hydraulic retention time of five or more days, and (ii) less than or equal to 17,500 m3, for any other continuous wastewater system; and (c) each month, if the average daily volume of effluent deposited via the final discharge point during the previous calendar year was greater than 17,500 m3. Certain results not taken into account (3) Where the facility is an intermittent wastewater treatment facility or a continuous flow wastewater treatment facility with a hydraulic retention time of 15 or more days, the determination of the average concentration referred to in clause (1)(b) shall not take into account the result of any determination of the concentration of suspended solids in a sample of effluent that was taken during the months of July through October, if that result exceeds 25 mg/L. (EC505/21) 23. Exception, other standards The Minister may require compliance with effluent quality standards other than those set out in section 22 as a term and condition on the licence to operate an alternative wastewater treatment facility or a wastewater treatment facility that is treating wastewater composed of less than 50% sewage. (EC505/21) 24. Application for permit for temporary bypass (1) The owner of a wastewater treatment facility may apply to the Minister, in the form required by the Minister, for a permit authorizing a temporary bypass of a portion or all of the wastewater treatment process, and the resulting discharge of partially treated or untreated wastewater to a watercourse, (a) to allow for maintenance or construction work on the facility; or Page 20 Current to: January 25, 2025 t c PART 6 - WASTEWATER TREATMENT SYSTEMS Water Supply System and Wastewater Treatment System Regulations Section 25 (b) where circumstances that are beyond the control of the owner threaten to compromise the integrity of the wastewater treatment process unless a portion of wastewater is diverted from the normal wastewater treatment process. Issuance of permit (2) On receipt of an application under subsection (1), the Minister may issue a permit authorizing the owner of a wastewater treatment facility to temporarily bypass a portion or all of the wastewater treatment process for that facility if, in the Minister’s opinion, it is necessary to maintain the long-term integrity of the wastewater treatment facility or will result in less overall impairment of water resources. Conditions (3) The Minister may impose terms and conditions on the permit to limit the impact of the bypass on the water course to which it is being discharged. Suspension or alteration of effluent quality standards (4) The Minister may, by the permit, suspend the application of or alter the effluent quality standards applicable to that facility under section 22 or pursuant to section 23. Information on permit (5) The permit shall state (a) the expiry date of the permit; (b) any terms and conditions imposed on the permit; and (c) any suspension or alteration of applicable effluent quality standards. (EC505/21) Monitoring Effluent Quality 25. Continuous flow, average daily rate ≥ 17,500 m3 (1) The owner of a continuous flow wastewater treatment system that has a hydraulic retention time of less than 15 days and discharges effluent to a watercourse at an average daily rate of 17,500 m3 or more shall ensure that (a) composite samples are collected and analysed for carbonaceous biochemical oxygen demand (cBOD5) and total suspended solids (TSS) at least once per week, with the interval between sampling being at least five days; (b) a grab sample is collected and analysed for faecal coliform organisms at least once per week, with the interval between sampling being at least five days; and (c) composite samples are collected and analysed for total ammonia, total phosphorous and total nitrogen at least once per quarter each year, with the interval between sampling being at least 60 days. Continuous flow, average daily rate > 2,500 m3 (2) The owner of a continuous flow wastewater treatment system that has a hydraulic retention time of less than 15 days, and that discharges effluent to a watercourse at an average daily rate that exceeds 2,500 m3 but is less than 17,500 m3, shall ensure that (a) composite samples are collected and analysed for carbonaceous biochemical oxygen demand (cBOD5) and total suspended solids (TSS) at least once every two weeks, with the interval between sampling being at least seven days; (b) a grab sample is collected and analysed for faecal coliform organisms at least once every two weeks, with the interval between sampling being at least seven days; and c t Current to: January 25, 2025 Page 21 PART 6 - WASTEWATER TREATMENT SYSTEMS Section 26 Water Supply System and Wastewater Treatment System Regulations (c) composite samples are collected and analysed for total ammonia, total phosphorous and total nitrogen at least once per quarter, with the intervals between sampling being at least 60 days. Continuous flow, hydraulic retention time ≥ 15 days or average daily rate ≤ 2,500 m3 (3) The owner of a continuous flow wastewater treatment facility with 15 days or greater hydraulic retention time, or an average daily flow that does not exceed 2,500 m3, shall ensure that (a) composite or grab samples are collected and analysed for carbonaceous biochemical oxygen demand (cBOD5), total suspended solids (TSS), total ammonia, total phosphorous and total nitrogen; and (b) a grab sample is collected and analysed for faecal coliform organisms, at least once per quarter each year, with the intervals between sampling being at least 60 days. Intermittent wastewater treatment facility (4) The owner of an intermittent wastewater treatment facility shall ensure that (a) composite or grab samples are collected and analysed for carbonaceous biochemical oxygen demand (cBOD5), total suspended solids (TSS), total ammonia, total phosphorous and total nitrogen; and (b) a grab sample is collected and analysed for faecal coliform organisms, as directed by the Minister. Acute lethality testing requirements (5) The owner of a wastewater treatment facility shall ensure that acute lethality testing is completed at least once per quarter each year on effluent, where the facility has or will be discharging effluent equal to or greater than 2500 m3/day on average for the calendar year, except (a) after four consecutive sampling events have confirmed the effluent is not acutely lethal, the sampling frequency for acute lethality testing may be reduced to once per calendar year, with the samples being collected at least six months apart; (b) where any sample tests as acutely lethal, the sampling frequency shall increase to twice per month, with the samples being collected at least seven days apart, until three consecutive samples indicate the effluent is not acutely lethal; (c) where acute lethality testing conducted within six months prior to the date this section came into force showed the effluent was not acutely lethal, the sampling frequency may be reduced to once per calendar year, with the samples being collected at least six months apart. Report re acutely lethal effluent (6) Where effluent from a wastewater treatment facility has tested as acutely lethal, the owner of the wastewater treatment facility shall submit a report to the Minister stating the cause of the acutely lethal effluent, the steps that will be taken to remedy the problem and the time within which those steps will be taken. (EC505/21) 26. Monitoring requirements may be condition of licence The Minister may require compliance with specified effluent monitoring requirements as a term and condition on the licence to operate an alternate wastewater treatment facility or a Page 22 Current to: January 25, 2025 t c PART 6 - WASTEWATER TREATMENT SYSTEMS Water Supply System and Wastewater Treatment System Regulations Section 27 wastewater treatment facility where more than 50% of the influent water is from an industrial wastewater treatment source. 27. Analysis required (1) The owner of a wastewater treatment facility shall ensure that wastewater quality samples collected in accordance with these regulations are analysed by a laboratory accredited by the Standards Council of Canada or by an accreditation body approved by the Minister. Submission of certain results (2) Where a wastewater quality sample is analysed by a laboratory other than the PEI Analytical Laboratories, the owner shall submit the results of the analysis to the Minister within five business days of receipt of the results. (EC505/21) Reporting and Disclosure of Information 28. Reporting of analyses required (1) The owner of a wastewater treatment facility shall report, in summary form, the results of analyses of effluent conducted in accordance with these regulations to the customers of the wastewater treatment facility and the Minister, at least once per year. Maintenance of records (2) The owner of a wastewater treatment facility shall ensure a record of all analyses of effluent required under these regulations is maintained for a period of at least five years. (EC505/21) 29. Results may be public information (1) The results of analyses of effluent conducted, or wastewater flow measurements taken, in accordance with these regulations shall be considered to be public information, and the Minister may, at his or her discretion, make this information available to the public in the form and through the means the Minister considers appropriate. Results available to environment officers (2) The owner or operator of a wastewater treatment facility shall ensure that results of analyses of effluent conducted, or wastewater flow measurements taken, in accordance with these regulations are made available to an environment officer, on request. Submission of results to (ERRIS) (3) The owner or operator of a wastewater treatment facility discharging effluent at flow rates of 100 m3/day or more shall ensure that results of analyses of effluent conducted, or wastewater flow measurements taken, in accordance with these regulations are submitted to and recorded by the Environmental Regulatory Reporting Information System (ERRIS) within 14 days of receiving the results or taking the measurements, as the case may be. Reporting required (4) The owner or operator of a wastewater treatment facility discharging effluent at rates or volumes that are above allowable limits stated on the licence to operate the facility or that fails to meet effluent quality standards in accordance with these regulations shall ensure that the discharge is reported to the Minister in the manner required by the Minister. (EC505/21) c t Current to: January 25, 2025 Page 23 SCHEDULE A Section 1 Water Supply System and Wastewater Treatment System Regulations SCHEDULE A CLASSIFICATION OF FACILITIES 1. Types of facilities (1) A facility shall be characterized as one of the following types: (a) water treatment facility (WT); (b) water distribution facility (WD); (c) wastewater treatment facility (WWT); (d) wastewater collection facility (WWC). Water distribution or treatment facility (2) A water supply facility shall be considered a water distribution facility unless a chemical other than chlorine is added to the water supplied, in which case it shall be considered a water treatment facility. Wastewater collection facility (3) A wastewater facility with only collection, lift stations and a gravity sewer main shall be considered a wastewater collection facility. Not a treatment facility (4) A water or wastewater facility with only simple in-line treatment, such as booster pumping, secondary chlorination or odour control, shall not be considered a water treatment facility or a wastewater treatment facility, as the case may be. 2. Water distribution or wastewater collection facility classifications (1) Subject to subsections (2) to (4), a water distribution facility or wastewater collection facility shall be classified as Class I, II, III or IV based on the size of the population served by the facility, in accordance with Table 1 of this Schedule. Small or very small water distribution facility (2) A water distribution facility that has 150 or fewer service connections and is not owned by a municipality shall be classified as small or very small based on the number of service connections the facility has, in accordance with Table 1 of this Schedule. Exception, campground (3) A water distribution facility that has more than 150 service connections, is not owned by a municipality and supplies water to a campground shall be classified as small. Size of population served < 500 (4) A water distribution facility that serves less than 500 persons but does not meet the criteria in subsections (2) or (3) to be classified as small or very small shall be classified as Class I. 3. Water or wastewater treatment classifications (1) Subject to subsection (2), a water treatment facility or wastewater treatment facility shall be classified as Class I, II, III or IV in relation to its size and complexity, based on the number of points assigned to it under Table 2 or 3 of this Schedule, as the case may be. Page 24 Current to: January 25, 2025 t c SCHEDULE A Water Supply System and Wastewater Treatment System Regulations Section 3 Simple industrial class (2) A wastewater treatment facility that treats and disposes of commercial or industrial process water only, not sewage, and would be classified as Class I or II but for this subsection, shall be classified as simple industrial. TABLE 1 FACILITY CLASSIFICATION SYSTEM Facility Classification Very Small Simple CLASS CLASS II CLASS CLASS Type criteria small Industrial I III IV 1. WT Range of points N/A N/A N/A 30 or less 31-55 56-75 > 75 2. WD Service 5 - 20 21 - N/A N/A N/A N/A N/A Connections 150 Population served N/A N/A N/A 500 - 1,500 1,501 - 15,001 - > 50,000 15,000 50,000 3. WWT Range of points N/A N/A 55 or less 30 or less 31-55 56-75 > 75 Composition of N/A N/A Industrial N/A N/A N/A N/A wastewater only 4. WWC Population served N/A N/A N/A 1,500 or 1,501 - 15,001 - > 50,000 less 15,000 50,000 TABLE 2 POINT SYSTEM CLASSIFICATION OF WATER TREATMENT FACILITIES: Each unit process shall have points assigned only once. Item Points Size (1 point minimum to 20 points maximum) Design flow average day, or peak month's flow average day, whichever is 1-20 larger (1 point per 1893 m3/day) Water supply sources • Seawater/Saltwater 0 • Groundwater (Non-GUDI) 0 • Groundwater under direct influence of surface water (GUDI) 8 • Surface water 10 Average Raw Water Quality – Applies to all sources (surface and groundwater). Key is the effect on treatment process changes that would be necessary to achieve optimized performance. • Little or no variation – no treatment provided except disinfection 0 • Minor variation – e.g. “high quality” surface source appropriate for slow 1 sand filtration • Moderate variation in chemical feed, dosage changes made monthly 2 • Variations significant enough to require pronounced or very frequent 5 changes • Severe variations – source subject to non-point discharges, 7 agricultural/urban storm runoff, flooding • Raw water quality subject to agricultural or municipal waste point source 8 discharges • Raw water quality subject to industrial waste pollution 10 Raw water quality is subject to or has elevated: • Taste or odour for which treatment process adjustments are routinely 2 c t Current to: January 25, 2025 Page 25 SCHEDULE A Section 3 Water Supply System and Wastewater Treatment System Regulations made • Colour > 15 TCU (not due to precipitated metals). 3 • Iron or/and manganese: Fe (2 points) or Mn (3 points) concentrations 2-3 above aesthetic objective 3 points maximum allowed • Algal growths for which treatment process adjustments are routinely 3 made Chemical treatment / Addition process • Fluoridation 4 • Disinfection/Oxidation (Note: Points are additive to a maximum of 15 0-15 points allowed for this category.) Check all that apply: • Chlorination: • Hypochlorites (5 points)  • If generated on site (add 1 point)  • Chlorine gas (8 points)  • Chloramination (10 points)  • Chlorine dioxide (10 points)  • Ozonation (10 points)  • UV Irradiation (2 points)  • Iodine, Peroxide, or similar (5 points)  • Potassium permanganate (4 points) (if used with greensand filtration do not give 4 points)  • pH adjustment for process control (e.g. pH adjustment aids coagulation 4 • Stability or Corrosion Control (If the same chemical is used for both 4 Corrosion Control and pH adjustment, count points only once) Coagulation / Flocculation process • Primary coagulant addition 6 • Coagulant aid / Flocculent chemical addition (in addition to primary 2 coagulant use) • Flocculation 2 • Filter aid addition (non-ionic / anionic polymers) 2 Clarification / Sedimentation Process • Sedimentation (plain, tube, plate) 4 • Contact adsorption 6 • Other Clarification processes (air flotation - DAF, ballasted clarification, 6 etc) • Upflow clarification (“sludge blanket clarifier”) 8 Filtration • Granular media filtration (Surface water / GUDI) ≤ 122 l pm / sq m 10 • Granular media filtration (Surface water / GUDI) ≥ 122 l pm / sq m 20 • Groundwater filtration 6 • Membrane filtration 10 • Diatomaceous earth (pre-coat filtration) 10 • Cartridge / bag filters 5 • Pre-filtration (staged filtration, pressure sand w/o coagulation, etc.): add 1-3 one point per stage to a maximum of 3 points • Slow sand 5 Other Treatment Processes • Aeration 3 • Air stripping (including diffused air, packed tower aeration) 5 Page 26 Current to: January 25, 2025 t c SCHEDULE A Water Supply System and Wastewater Treatment System Regulations Section 3 • Ion-exchange / softening 5 • Greensand filtration 10 • Lime-soda ash softening (includes: chemical addition, 20 mixing/flocculation/clarification/filtration - do not add points for these processes separately) • Granular activated carbon filter (do not assign points when included as a 5 bed layer in another filter) • Powdered activated carbon 2 • Reservoir management employing chemical addition 2 • Blending sources with significantly different water quality 2-4 • To achieve health related compliance (4 points) • For aesthetic reasons (2 points) • Electro dialysis 15 • Other: Certification authority may assign 2 to 15 additional points for 2-15 processes not listed elsewhere in this document. (Specify: ___________) Residuals Disposal • Discharge to surface, sewer, or equivalent (0 points) 0 • On-site disposal, land application (1 point) 1 1 • Discharge lagoon / drying bed, with no recovery / recycling e.g. downstream outfall (1 point) • Backwash recovery/recycling: discharge to basin or lagoon and then to 2 source (2 points) • Backwash recovery/recycling: discharge to basin or lagoon and then to 3 plant intake (3 points) Instrumentation • The use of a supervisory control and data acquisition SCADA system or 0 similar instrumentation systems to provide data with monitoring/alarm only, no process operation – plant has no automated shutdown capabilities. • The use of SCADA or similar instrumentation systems to provide data 1 with limited process operation – e.g. remote shutdown capability. • The use of SCADA or similar instrumentation systems to provide data 2 with moderate process operation – alarms and shutdowns, plus partial remote operation of plant. • The use of SCADA or similar instrumentation systems to provide data 4 with extensive or total process operation – alarms and shutdowns, full remote operation of plant possible. TABLE 3 POINT SYSTEM CLASSIFICATION OF WASTEWATER TREATMENT FACILITIES Each unit process shall have points assigned only once. Item Points Size (20 point maximum) Maximum population served, peak day, per annum. 1 point per 10,000 1-10 population served or any fraction thereof Design flow average day or peak month’s average day, per annum, 1-10 c t Current to: January 25, 2025 Page 27 SCHEDULE A Section 3 Water Supply System and Wastewater Treatment System Regulations whichever is larger. 1 point per 3785 m3/day or any fraction therof. Variation in raw waste (6 points maximum) • Variations do not exceed those normally or typically expected 0 • Recurring deviations or excessive variations of 100 to 200% in 2 strength or flow • Recurring deviations or excessive variations of more than 200% in 4 strength or flow • Raw wastes subject to toxic waste discharges 6 • Impact of septage or truck-hauled waste where: 0-4 0 = no septage or truck hauled waste accepted; 2 = septage or truck waste accepted seasonally, only; and 4 = septage or truck waste accepted at all times. Preliminary treatment • Facility pumping of main flow 3 • Screening or Comminution 3 • Grit removal 3 • Equalization 1 • Grease removal 3 Primary treatment • Sedimentation/Clarification 5 • Imhoff tanks or similar 5 • Coagulation/Flocculation 5 Secondary treatment • Fixed-film reactor 10 • Activated sludge 15 • Stabilization ponds without aeration 5 • Stabilization ponds with aeration 8 • Bio-filtration with secondary clarifiers 10 Tertiary treatment • Polishing ponds for advanced waste treatment 2 • Chemical/physical advanced waste treatment without secondary 15 treatment • Chemical/physical advanced waste treatment following secondary 10 • Biological or chemical/biological advanced waste treatment 12 • Nitrification by designed extended aeration only 2 • Ion exchange for advanced waste treatment 10 • Reverse osmosis, electrodialysis and other membrane filtration 15 techniques • Advanced waste treatment chemical recovery, carbon regeneration 4 • Media filtration 5 Additional treatment processes • Chemical additions (2 points each for a maximum of 6 points) 2-6 • Dissolved air flotation 3 • Intermittent sand filter 2 • Recirculating intermittent sand filter 3 • Microscreens 5 • Generation of oxygen 5 • pH adjustment 1 Page 28 Current to: January 25, 2025 t c SCHEDULE A Water Supply System and Wastewater Treatment System Regulations Section 3 • Oil separation 3 • Air stripping 5 • Biological or chemical scrubbers for odor control 5 Solids handling • Solids stabilization 5 • Gravity thickening 2 • Solids thickening 5 • Mechanical dewatering of solids 8 • Anaerobic digestion of solids 10 • Utilization of digester gas for heating or cogeneration 5 • Aerobic digestion of solids 6 • Evaporative sludge drying 2 • Solids reduction (including incineration, wet oxidation) 12 • On-site landfill for solids 2 • Solids composting 10 • Irrigation of solids 5 • Land application of biosolids by contractor 2 • Land application of biosolids under direction of operator-in-charge 10 Disinfection (10 points maximum) • Chlorination or ultraviolet irradiation 5 • Ozonation 10 Effluent discharge (10 points maximum) • Mechanical post aeration 2 • Direct recycle and reuse 6 • Land disposal (surface) 2 • Land disposal (subsurface) 4 Instrumentation (6 points maximum) • The use of SCADA or similar instrumentation systems to provide 0 data with no process operation • The use of SCADA or similar instrumentation systems to provide 2 data with limited process operation • The use of SCADA or similar instrumentation systems to provide 4 data with moderate process operation • The use of SCADA or similar instrumentation systems to provide 6 data with extensive or total process operation Laboratory Control – Bacteriological/Biological (20 point maximum) • Lab work done outside the facility 0 • Membrane filter procedures 3 • Use of fermentation tubes or any dilution method; fecal coliform 5 determination • Biological identification 7 • Viral studies or similarly complex work conducted on-site 10 Laboratory Control – Chemical/Physical (10 point maximum) • Lab work done outside the facility 0 • Push-button or visual methods for simple tests such as pH, settleable 3 solids • Additional procedures such as measurements of dissolved oxygen, 5 chemical oxygen demand, biological oxygen demand, gas analysis, c t Current to: January 25, 2025 Page 29 SCHEDULE B OPERATOR CERTIFICATION Section 1 Water Supply System and Wastewater Treatment System Regulations titrations, solids, volatile content • More advanced determinations such as specific constituents; 7 nutrients, total oils, phenols • Instrumentation such as atomic absorption, gas chromatography 10 (EC54/25) SCHEDULE B OPERATOR CERTIFICATION 1. Types of operator certification The types of operator certification are as follows: (a) water distribution facility operator; (b) water treatment facility operator; (c) wastewater treatment facility operator; (d) wastewater collection facility operator. 2. Classes of water distribution facility operator certificates (1) A water distribution facility operator certificate shall be issued at the classification level of small class or Class I, II, III, or IV in accordance with the qualifications of the operator and the requirements set out in this Schedule. Classes of wastewater treatment facility operator certificates (1.1) A wastewater treatment facility operator certificate shall be issued at the classification level of simple industrial class or Class I, II, III, or IV in accordance with the qualifications of the operator and the requirements of this Schedule. Classes of other operator certificates (2) A water treatment facility operator’s certificate or a wastewater collection facility operator's certificate shall be issued at the classification level of Class I, II, III, or IV in accordance with the qualifications of the operator and the requirements set out in this Schedule. 3. Education requirements (1) Table 1, below, outlines the minimum education requirements for the certification of operators at each classification level: Table 1 - Education Requirements Class Education Secondary Post-Secondary Small 12 hours of training approved by the N/A Minister Simple industrial Training approved by the Minister N/A I Grade 12 or equivalent Entry-level training as determined by the Minister II Grade 12 or equivalent N/A III Grade 12 or equivalent 2 years or 900 contact hours IV Grade 12 or equivalent 4 years or 1800 contact hours Page 30 Current to: January 25, 2025 t c SCHEDULE B OPERATOR CERTIFICATION Water Supply System and Wastewater Treatment System Regulations Section 3 Grade 12 equivalent (2) The following are considered equivalent to Grade 12: (a) a General Educational Development Equivalency Diploma (GED); (b) a post-secondary assessment by person or institution considered qualified to assess education status; (c) the successful completion of a certification program recognized by the jurisdictional apprenticeship and occupational certification authority (trade certified); (d) successful completion of a post-secondary degree program from a recognized institution; (e) successful completion of a diploma or certificate program from a recognized institution. No substitution (3) There shall be no substitution of operating experience for the high school requirement. Acceptable post-secondary courses (4) The following courses are considered acceptable for post-secondary requirements: (a) successful completion of a certification program recognized by the jurisdictional apprenticeship and occupational certification authority (trade certified), if not counted towards an applicant’s secondary education requirement; (b) successful completion of a post-secondary degree program from a recognized institution; (c) partial completion of a relevant apprenticeship, post-secondary degree or diploma program or completion of relevant short courses; (d) partial completion of relevant trades, post-secondary degree, or diploma programs; (e) completion of relevant short courses or correspondence courses, which the Minister has determined to be acceptable continuing education units with 45 continuing education units being considered by the Minister as being equivalent to one year of post-secondary education. Acceptable post-secondary programs (5) The programs accepted for fulfilment of post-secondary education requirements include: (a) degree programs in the fields of Science, Engineering, Agriculture, Biology, Chemistry, Physics, Mathematics, Laboratory Studies or Hydrogeology; (b) diploma programs in the fields of Applied Science and Technology, Environmental Technician or Environmental Technologist, or Laboratory Studies; (c) the academic portion of relevant trades programs accepted at a value assigned by the Minister including Power Engineering, Instrumentation, Plumbing, Electrical, Millwright and Mechanics; (d) short courses relevant to the duties of operators accepted at a value assigned by the Minister; (e) other four-year university degree programs, up to a maximum of 450 contact hours, with the Minister’s approval; (f) other courses that the Minister has determined are directly related to the operation of water supply or wastewater treatment systems. c t Current to: January 25, 2025 Page 31 SCHEDULE B OPERATOR CERTIFICATION Section 4 Water Supply System and Wastewater Treatment System Regulations 4. Substitution of DRC experience for education (1) DRC experience obtained in a Class II or higher class facility and not counted towards the minimum DRC experience requirements in section 5 may be substituted for up to one year of the post-secondary education requirements for Class III operator certification. (2) DRC experience obtained in a Class III or IV facility after obtaining Class III operator certification and not counted towards the minimum DRC experience requirements in section 5 may be substituted for up to two years of the post-secondary education requirements for Class IV operator certification. 5. Experience requirements (1) Table 2, below, specifies the minimum experience requirements for the certification of operators in classes I to IV: Table 2 - Minimum Experience Requirements Class Operating Experience DRC Experience I 1 year (1,800 hours) 0 years II 3 years (5,400 hours) 0 years III 4 years (7,200 hours) 2 years in Class II or higher facility (3,600 hours) IV 4 years (7,200 hours) 2 years in Class III or higher facility (3,600 hours) No substitutions for Level I (2) No education substitutions are allowed to meet the operating experience requirement for a Class I operator. Substitutions for Levels II, III, and IV (3) Education substitutions for up to 50% of the operating experience requirement are allowed for Class II, III and IV operators, in accordance with section 6 of this Schedule. Operating credit - how granted (4) Full operating credit shall be granted for each type of facility or system an operator is employed at in full capacity unless the operator is only working part-time within the system. Operating experience to be verified (5) Operating experience shall be verified by an operator-in-charge or owner representative and supported by a job description and list of operational job duties. Meaning of operating experience (6) Operating experience means hands-on operation of the facility or system or on- site operational responsibility for operational decisions. Meaning of hands-on (7) Hands-on means the applicant has been actively operating a facility or system and gaining knowledge, at least in part, from that daily operating experience and not merely from textbook study. 6. Substitution of related experience (1) The Minister may consider as related experience, operating experience obtained in a facility other than the type of facility for which certification is sought, and may allow an operator Page 32 Current to: January 25, 2025 t c SCHEDULE B OPERATOR CERTIFICATION Water Supply System and Wastewater Treatment System Regulations Section 7 with at least one year of operator experience to substitute related experience for up to 50% of the required operator experience for certification in classes II, III and IV. Related experience obtained through education or training (2) Related experience obtained through particular education or training shall be credited for required operational experience in the following ratios: (a) where the related experience was obtained in a water or wastewater facility or a related facility as part of a relevant certification program recognized by the jurisdictional apprenticeship and occupational certification authority, such as a program for certification as an electrician, plumber, pipe-fitter, millwright or power or stationary engineer - 1:2; (b) where the related experience was obtained in a facility other than a water or wastewater facility or a related facility as part of a relevant certification program recognized by the jurisdictional apprenticeship and occupational certification authority, such as a program for certification as an electrician, plumber, pipe-fitter, millwright or power or stationary engineer - 1:3; (c) where the related experience was obtained as part of an education or training program for a technical profession directly related to water and wastewater management, such as an engineer, engineering technician, environmental technician or technologist, or laboratory technician - 1:2; (d) for an water distribution facility operator certificate or a wastewater collection facility operator certificate, where the related experience was obtained as part of a semi-relevant certification program recognized by the jurisdictional apprenticeship and occupational certification authority, such as a program for certification as a welder or pipe-layer - 1:3. Maximum substitution (3) The substitution of education and related experience for operating experience shall not exceed 50% of the stated operating experience requirement. 7. Obtaining DRC experience (1) An operator will obtain DRC experience when the operator has been authorized to perform, on a day-to-day basis, any of the following types of duties: (a) review and establish operational parameters for a facility or system; (b) control the on-site operations of a facility or system, including monitoring, evaluation and adjustment of the facility or system or process; (c) provide on-site supervision of operators performing duties set out in clause (a) or (b). Only after Level II obtained (2) DRC experience may only be obtained after an operator has Class II operator certification. Level III requirements (3) For Class III operator certification, an operator shall obtain the required DRC experience in a Class II or higher facility. Level IV requirements (4) For Class IV operator certification, an operator shall obtain the required DRC experience at a Class III or IV facility after obtaining Class III operator certification. c t Current to: January 25, 2025 Page 33 SCHEDULE B OPERATOR CERTIFICATION Section 7 Water Supply System and Wastewater Treatment System Regulations Substitution of post-secondary education (5) Post-secondary education not counted towards the minimum education requirements in Table 1 or substituted for operating experience may be substituted for up to 50% of the DRC experience required in Table 2. (EC505/21; 54/25) Page 34 Current to: January 25, 2025 t c SCHEDULE C REQUIRED DRINKING WATER QUALITY MONITORING PARAMETERS Water Supply System and Wastewater Treatment System Regulations Section 1 SCHEDULE C REQUIRED DRINKING WATER QUALITY MONITORING PARAMETERS 1. General chemical analysis For the purpose of these regulations, a general chemical analysis shall include, as a minimum, the analysis of a water quality sample for the following substances and water quality parameters: (a) alkalinity; (b) arsenic; (c) barium; (d) calcium; (e) chloride; (f) copper; (g) hardness; (h) iron; (i) lead; (j) magnesium; (k) manganese; (l) nitrate; (m) pH; (n) phosphorous; (o) potassium; (p) selenium; (q) sodium; (r) sulphate; (s) turbidity; (t) uranium; (u) zinc. 2. Detailed chemical analysis, substances (1) For the purpose of these regulations, a detailed chemical analysis shall include, as a minimum, the analysis of a water quality sample for the substances listed in subsections (2) to (5). Metals and other inorganic constituents tested at source (2) Water samples collected from each source of supply shall be analysed for the following metals and other inorganic constituents: (a) aluminium; (b) antimony; (c) boron; (d) bromide; (e) cadmium; (f) chromium; c t Current to: January 25, 2025 Page 35 SCHEDULE C REQUIRED DRINKING WATER QUALITY MONITORING PARAMETERS Section 2 Water Supply System and Wastewater Treatment System Regulations (g) fluoride; (h) silver; (i) strontium; (j) total organic carbon. Organic constituents tested at source (3) Water samples collected from each source of supply shall be analysed for the following organic constituents: (a) benzene; (b) benzo[a]pyrene; (c) carbon tetrachloride; (d) chlorophenols; (e) dichlorobenzenes; (f) dichloroethane; (g) dichloroethylene; (h) dichloromethane; (i) ethylbenzene; (j) monochlorobenzene; (k) tetrachloroethylene; (l) toluene; (m) trichloroethylene; (n) vinyl chloride; (o) xylenes. Metals and other inorganic constituents tested at two locations (4) Water samples collected from at least two representative locations within the water distribution facility shall be analysed for the following metals and other inorganic constituents: (a) aluminium; (b) antimony; (c) boron; (d) bromate; (e) cadmium; (f) chromium; (g) fluoride; (h) silver; (i) strontium; (j) total organic carbon; (k) vanadium. Organic constituents tested at two locations (5) Water samples collected from at least two representative locations within the water distribution facility shall be analysed for the following organic constituents: (a) benzo[a]pyrene; (b) bromodichloromethane; Page 36 Current to: January 25, 2025 t c SCHEDULE C REQUIRED DRINKING WATER QUALITY MONITORING PARAMETERS Water Supply System and Wastewater Treatment System Regulations Section 2 (c) bromoform; (d) chloramines; (e) chlorodibromomethane; (f) chloroform; (g) total trihalomethanes. (EC505/21) SCHEDULE D FEES Purpose of Fee Regulation Provision Fee 1. Permit to construct or modify facility, per 2(4)(b) cost of project: $100 (a) < $200,000; $500 (b) $200,000 to $999,999; $1,000 (c) $1,000,000 and above. 2. Permit to undertake activity described in 4(3)(b) $50 subsection 4(1). 3. Licence to operate facility: (a) Very small or small facility; 5(2)(d); 5(4)(c) $50 (b) Simple industrial facility $250 (c) Class I or II facility; $250 (d) Class III or IV facility. $500 4. Examination. 8(2)(b); 8(8)(a) $100 5. Operator’s certificate. 8(2)(c); 8(3)(b); 8(8)(b) $50 (EC505/21; 54/25) c t Current to: January 25, 2025 Page 37 SCHEDULE E Section 1 Water Supply System and Wastewater Treatment System Regulations SCHEDULE E STANDARDS FOR MATERIALS IN CONTACT WITH DRINKING WATER, DEVICES USED FOR TREATING DRINKING WATER AND DETERMINATION OF LOG CREDITS FOR DISINFECTION 1. Standards (1) The standards referred to in subsection 11(2) of these regulations for materials in contact with drinking water, or for devices that are used to treat drinking water, are: (a) for health-based standards for materials and devices in contact with drinking water: (i) NSF 60 - Drinking water treatment additives - Health effects, (ii) NSF 61 - Drinking water system components - Health effects; and (b) for health-based performance standards for drinking water treatment devices: (i) NSF 53 - Drinking water treatment units - Health effects, (ii) NSF 55 - Ultraviolet microbiological water treatment systems, (iii) NSF 58 - Reverse osmosis drinking water treatment systems, (iv) NSF 62 - Drinking water distillation systems. Log reduction credits (2) Log reduction credits for primary disinfection of drinking water shall be determined in accordance with the following subsections and Tables 1.1, 1.2 and 2 of this Schedule. Primary disinfection (3) Class I to IV water distribution facilities can achieve primary disinfection of source water prior to delivery to their customers as required by subsection 10(4) of these regulations by using (a) chemical disinfection using free chlorine or chlorine dioxide as a disinfectant; (b) ultraviolet disinfection; or (c) a combination of chemical and ultraviolet disinfection as set out in this section. Chlorine or chlorine dioxide disinfection (4) Compliance with the primary disinfection requirements for drinking water when using a chemical disinfectant requires that a CT value, as set out in subsection (6), is maintained that meets or exceeds the required log reduction of viruses taken from Table 1.1 or 1.2, below, for free chlorine or chlorine dioxide respectively. CT value (5) The CT value selected from Table 1.1 or 1.2, below, should represent the conditions of the lowest temperature and highest pH of the water to be disinfected. How calculated (6) CT values are calculated by multiplying concentration of chlorine or chlorine dioxide (C), expressed as mg/L, by the time the water is in contact with the disinfectant (T), expressed in minutes. Page 38 Current to: January 25, 2025 t c SCHEDULE E Water Supply System and Wastewater Treatment System Regulations Section 1 “T” factor (7) The factor “T” is calculated by multiplying the theoretical hydraulic detention time of the contact chamber (i.e. volume of contact chamber divided by the flow rate) by a baffling factor for the contact chamber taken from Table 2, below. Value of T (8) The value of T used in the calculation should represent the minimum contact time, based on the peak hourly flow rate of the water distribution facility. Table 1.1 - CT Values for inactivation of viruses by free chlorine (pH = 6-9) Water 2-log 3-log 4-log Temperature Inactivation Inactivation Inactivation (°C) 0.5 6 9 12 5 4 6 8 10 3 4 6 15 2 3 4 20 1 2 3 25 1 1 2 Table 1.2 - CT Values for inactivation of viruses by chlorine dioxide Water 2-log 3-log 4-log Temperature Inactivation Inactivation Inactivation (°C) ≤1 8.4 25.6 50.1 5 5.6 17.1 33.4 10 4.2 12.8 25.1 15 2.8 8.6 16.7 20 2.1 6.4 12.5 25 1.4 4.3 8.4 Table 2 - Baffling Factors to be used for calculation of contact times (T) Baffling Conditions Baffling Factor Baffling Description Perfect Mix 1 -Very high length to width ratio -Typical for plug flow Superior mix 0.7 -Perforated inlet baffle -Serpentine or perforated intra-basin baffles -Outlet weir or perforated launders Average 0.5 -baffled inlet or outlet with some intra-basin baffles Poor 0.3 -single/multiple un-baffled inlets and outlets -No intra-basin baffles Un-baffled 0.1 -No baffles, separate inlet/outlet -mixed flow -high inlet/outlet velocities -low length to width ratio c t Current to: January 25, 2025 Page 39 SCHEDULE E Section 1 Water Supply System and Wastewater Treatment System Regulations Ultraviolet (UV) disinfection (9) Compliance with the primary disinfection requirements for drinking water when using a ultra-violet disinfection requires that a UV dose is maintained that meets or exceeds the required log reduction of viruses taken from Table 3, below. UV dose calculation (10) The UV dose (mJ/cm2) is calculated by multiplying intensity of the ultra-violet light source (µW/cm2) by the length of time (T), measured in seconds, the water is exposed to UV radiation. Basis for calculation (11) The UV dose calculation should be based on the minimum exposure time of the water to UV radiation, based on the peak hourly flow rate of the system, and should take into account any recommendations from the manufacturer of the treatment devices with respect to influent water quality. Table 3 - UV Dose Values for inactivation of viruses Log Inactivation UV Dose (mJ/cm2)* 0.5 40 1.0 58 1.5 79 2.0 100 2.5 121 3.0 143 3.5 163 4.0 186 *Based on adenovirus inactivation. (EC505/21) Page 40 Current to: January 25, 2025 t c