volume 1 - Halifax Regional Municipality

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Halifax Water Integrated Resource Plan Integrated Resource Plan Drivers and Objectives 4.3 REGULATORY COMPLIANCE 4.3.1 Water System Nova Scotia Environment is the provincial government department with oversight responsibility for drinking water. Current NSE regulations for drinking water focus on water works approvals, facility classification and operator certification, drinking water quality, and monitoring and reporting. The Guidelines for Canadian Drinking Water Quality 20 provide guidance about acceptable levels of microbiological, chemical and radiological contaminants in drinking water as well as acceptable physical characteristics of drinking water, including taste and odour. The guidelines are based on current, published scientific research related to health effect, aesthetics, and facility operations and infrastructure. Halifax Water meets all current water distribution and treatment compliance requirements. All water distribution and treatment facilities owned and operated by Halifax Water have received the required approvals, and certified operators of appropriate classification operate all facilities. Canada’s Federal-Provincial-Territorial Committee on Drinking Water has undertaken a number of consultations since 2010 aimed at identifying new or revised drinking water quality guidelines. Of interest to Halifax Water are proposed guidelines for dichloromethane 21 and for N-nitrosodimethylamine (NDMA) 22 , and these are shown in Table 4.1. Table 4.1 Recent Health Canada Consultations on Drinking Water Quality Guidelines Parameter Description Type Current Guideline Proposed Guideline Dichloromethane Existing 0.05 mg/L 0.015 mg/L N-nitrosodimethylamine (NDMA) New – 0.04 µg/L Based on the assessment of current source and drinking water quality and current treatment processes, it is expected that neither change in guidelines should pose any compliance issues for Halifax Water. 20 Guidelines For Canadian Drinking Water Quality, Health Canada, August 2012 21 Dichloromethane in Drinking Water, Federal-Provincial-Territorial Committee on Drinking Water, July 2010 22 N-nitrosodimethylamine (NDMA) in Drinking Water, Federal-Provincial-Territorial Committee on Drinking Water, March 2010 Revision: 2012-10-29 Integrated Resource Plan 33 October 31 2012 Page 66 of 272
Halifax Water Integrated Resource Plan Integrated Resource Plan Drivers and Objectives Over the longer term, the following regulatory developments can reasonably be expected to occur: • Reducing Disinfection By-Products – Trihalomethanes (THMs), Haloacetic acids (HAAs). Continued use of chlorine-based (and bromine-based) disinfectants is expected to result in continued scrutiny of the health and environmental effects of halogenated compounds that form during drinking water treatment. In the United States, for example, the United States Environmental Protection Agency (U.S. EPA) has identified chlorinated disinfection by-products as a group of contaminants that will be the focus of efforts in the short term. Actions under consideration include increasing disinfection by-product precursor removal targets. The U.S. EPA example is provided here because, historically, Canada has often followed developments in the United States with similar regulatory initiatives here. The Halifax Water WQMP places attention on the reduction of THMs and HAAs to mitigate risk exposure with respect to compliance when new, stricter standards come into place. The WSP improvement projects needed to meet expected disinfection by-product precursor removal targets are already incorporated in the Five-Year Capital Plan. Implementation of the water treatment process improvements delivered by these projects will ensure future compliance. • New Parameters and Lower Maximum Acceptable Concentrations (MACs) Over the longer term, it is reasonable to expect that the Federal-Provincial- Territorial Committee on Drinking Water will continue to review the MACs for individual parameters and propose changes when warranted by new information. As detection limits are lowered, it is reasonable to assume that existing MACs may be reduced to reflect new scientific information in cases where adverse health effects may, or are expected to, occur. It is also reasonable to expect that guidelines will be introduced for new parameters. The requirements for new drinking water quality parameters or lower MACs should be readily addressed with continued updates of the WQMP, the incorporation of the WQMP into a system-wide proposed Water Master Plan and the on-going Halifax Water collaborative research with Dalhousie University. 4.3.2 Wastewater System Halifax Water has a strong commitment to ensuring high quality wastewater services and has operationalized this commitment through a variety of actions, policies, and programs. All wastewater facilities owned and operated by Halifax Water have received the required approvals, and certified operators of appropriate classification operate all facilities. Revision: 2012-10-29 Integrated Resource Plan 34 October 31 2012 Page 67 of 272
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Financial Model 40-4 Halifax Water
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Financial Model 40-4 1.028 Cavalier
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Asset Renewal Costs Halifax Water I
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Statement Concerning Halifax Water
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Statement Concerning Halifax Water
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volume 1 - Halifax Regional Municipality

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