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Government of Ontario Ministry of the Environment
Location: Ministry Home > Water

Water

Ontarians deserve access to clean, safe water. This means keeping water free of pollutants and contaminants that could harm the environment and human health.

The Government of Ontario is moving forward on a series of initiatives to preserve water quality, including new legislation, regulations, standards and requirements.

This section contains information to help educate the public about the importance of clean, safe drinking water. It also helps those responsible for water quality understand the rules, regulations and standards currently in place.

Walkerton and the O'Connor Inquiry

Many of the Ministry of the Environment clean water initiatives are based on recommendations from Commissioner Dennis O’Connor’s Report of the Walkerton Inquiry. Click here for more information on the Walkerton Inquiry or on the links below to review MOE’s progress on these recommendations.

Resources
Status of Part One recommendations of the O’Connor Inquiry
Status of Part Two recommendations of the O’Connor Inquiry
Report of the Walkerton Inquiry, Part One and Part Two

For more information on drinking water materials, see the Research and Publications section of this web site or click on one of the links below

Drinking Water MInistry Programs - Publications Catalogue
Drinking Water Technical Studies and Reports - Publications Catalogue
Drinking Water Forms and Guidelines - Publications Catalogue

Protecting Drinking Water Quality

All Ontarians depend on clean, safe drinking water. If you don't get your water from a private well, odds are your water is supplied by a "regulated drinking water system."

A regulated drinking water system may be anything from a large municipal water treatment plant to a single water well servicing a campground. All regulated systems are required by law to ensure that they are taking measures to protect the quality of their water.

Regulated systems must treat their water to prevent contamination and must test their water quality regularly.

This section describes some of the requirements for operators of water and sewage treatment systems and laboratories that test drinking water. Click here for more information on whether your source of drinking water is a regulated system.

Resources
Chief Drinking Water Inspector

The Chief Drinking Water Inspector’s role is to ensure that drinking water systems meet Ontario’s stringent standards for protecting the quality of the province’s drinking water.

Learn more about the Chief Drinking Water Inspector

Act and Regulations

Regulated systems must meet the requirements of Ontario's Safe Drinking Water Act and its regulations. Most notably, the Drinking Water Systems Regulation sets out treatment and testing requirements for all categories of regulated water systems, including small non-municipal and seasonal operations

Drinking Water Legislation in Ontario

This page contains links to the Safe Drinking Water Act and other acts and regulations related to Ontario's drinking water. All acts and regulations located on the e-Laws Web site.

The Safe Drinking Water Act, 2002 and Sustainable Water and Sewage Systems Act, 2002 Information page

Drinking Water Systems Regulations

The Drinking Water Systems Regulation O. Reg. 170/03 Information page

Regulation for non-residential and non-municipal seasonal residential systems that do not serve designated facilities (Ontario Regulation 252/05)

Information for Drinking Water Systems Owners and Operators

Information for the owners and operators of Municipal Drinking Water Systems (O. Reg. 170/03)

Information for the owners and operators of Non-Municipal Drinking Water Systems (O. Reg. 170/03)

Information for the owners and operators of Non-Residential and Seasonal Residential systems that do not serve designated facilities (O. Reg. 252/05)

Certification and Training

The Water and Wastewater Operator Certification Program

Laboratory Licensing
Laboratory Licensing information and documents

The Safe Drinking Water Act, 2002 (SDWA) and the Drinking Water Testing Services Regulation (O. Reg. 248/03) require any laboratory that performs drinking water testing to obtain a licence effective October 1, 2003. In addition, the SDWA requires owners and operating authorities of drinking water systems regulated under the Drinking Water Systems Regulation (O. Reg. 170/03) to use a licensed laboratory for drinking water testing.

Monitoring and Compliance

Drinking water systems are required to monitor their water quality to ensure it meets provincial standards. This usually involves sending water samples to laboratories specially licensed to test drinking water.

An ‘adverse water quality incident’ (AWQI) happens any time a water system or water testing lab detects levels of a contaminant in a water sample that exceed a standard. An AWQI does not necessarily mean that the water is contaminated: sometimes an AWQI is the result of a sampling error. Additional tests are ordered to confirm initial results.

Overview of the Ministry of the Environment Municipal Drinking Water Inspections Protocol

The Ministry of the Environment (MOE) has developed the Municipal Drinking Water Inspections Protocol (the Protocol) to guide its drinking water inspections.

DWIS - Drinking Water Information System Web site
Adverse Drinking Water Quality Incidents Reports
Environmental Compliance Reports

This site provides information about non-compliant discharges - discharges of contaminants to air and water that exceed legal allowable limits - from industrial and municipal facilities that are regulated by the Ministry of the Environment.

Related Water and Sewage Treatment Links
Drinking Water Treatment Service Providers
Stormwater Pollution Prevention Handbook

The goal of the handbook is to provide municipalities, conservation authorities, community groups, businesses, and individuals with practical information on implementing pollution prevention and flow reduction programs for stormwater runoff and combined sewer overflows.

Septic Systems and Hauled Sewage Regulation Changes (June 1998)
Technical Brief : Ontario Wastewater Systems Licensing of Sewage Works Operators Regulation [HTML]

Advisory Council on Drinking Water Quality and Testing Standards

Recommended by Justice O'Connor in the Part Two Report of the Walkerton Inquiry, and created under the Safe Drinking Water Act, the Council's mandate is to advise the Minister of the Environment on drinking water standards, legislation, regulations, and issues, to protect the water that Ontarians drink. For more information, visit the Advisory Council on Drinking Water Quality and Testing Standards website.

Clean Water Act

The Clean Water Act, 2005 was introduced for First Reading on December 5, 2005.

Watershed-based Source Protection

Sourcewater protection is the first barrier in a multi-barrier approach to protecting the water in Ontario's lakes, rivers and underground aquifers. Source protection complements water treatment by reducing the risk that water gets contaminated in the first place.

Watershed-based planning takes the natural boundaries of surface and groundwater into consideration, rather than man-made lines drawn on a map.

Resources

Watershed-based source protection planning

The Ontario government is developing legislation that takes a watershed-based approach to source protection and addresses all sources of drinking water.

Permits to Take Water

The province’s water taking rules have been overhauled to ensure tough reviews of water taking permits and stronger conservation measures. New or expanded takings that would remove water from watersheds that already have a high level of use will no longer be allowed.

Read more about Permits To Take Water

Nutrient Management

Plant nutrients found in both manure and chemical fertilizers are essential to a farm operation. When applied in proper quantities and at appropriate times, the nutrients will aid in achieving optimum crop yields. However, improper use of nutrients can lead to soil-nutrient imbalances and can cause water quality problems both locally and downstream. The objective of nutrient management is to use nutrients (mainly nitrogen, phosphorus and potassium) wisely for optimum economic benefit, while minimizing impact on the environment.

The Ontario government introduced the Nutrient Management Act in 2002. Under this act, farms must develop nutrient management plans to deal with animal waste and other substances that are kept on farm properties or spread on fields. Nutrient management plans help ensure that farms are managed in an environmentally responsible way to prevent contamination of lakes, streams and groundwater.

Learn more about Nutrient Management

Groundwater Studies

The Ministry of the Environment has funded a series of groundwater studies to help measure the quantity, quality and location of water in underground aquifers. These studies help improve our understanding of how much groundwater we have and how quickly it gets replenished once water is removed from an aquifer. Studies also show how quickly water and contaminants can move through different types of underground rock and soil.

Groundwater Studies
Report: Groundwater studies in Ontario - Mapping a hidden treasure
A Groundwater Monitoring Network and Partnership for Ontario
Inland Lakes and Rivers programs - Publications Catalogue

Provincial Groundwater Monitoring Information System (PGMIS)

The Provincial Groundwater Monitoring Information System (PGMIS) is a web-driven application that assists the Ministry of the Environment and its partners to monitor the state of the Province's groundwater resources.

Water Wells

Over three million Ontarians rely on groundwater for their drinking water. There are hundreds of thousands of water wells across Ontario, providing drinking water to municipalities, industries and private residences.

Wells providing water to small businesses, common spaces and residential communities may qualify as "regulated systems" Private wells are not regulated systems, but there are new rules in place for constructing or decommissioning (abandoning) a well. See Ontario's Wells Regulation (Reg. 903) for more information.

Wells Information and Documents
Water Wells and Groundwater General Interest - Publications Catalogue
Directory of Licensed Water Well Contractors in Ontario
Municipal/Industrial Strategy for Abatement (MISA)
MISA Information and Documents

Research and Publications

This section will help you find publications and reports issued by the Ministry of the Environment and its partners.

Resources
Drinking Water Surveillance Program Reports

Great Lakes and Inland Lakes

The Ontario government remains firmly committed to rehabilitating, protecting and conserving the Great Lakes. The province recognizes that the cleanup of the lakes is a gradual and cumulative process based the efforts of a wide range of partners. Ontario is focusing its efforts on actions that will benefit the people of Ontario and future generations.

Resources
2005 - 2006 Guide To Eating Ontario Sport Fish
The Great Lakes
The Lake Partner Program - The Lake Partner Program is a province-wide, volunteer-based, water-quality monitoring program.
Lakewide Management Plans (LaMPs) - As part of its commitment to Great Lakes protection, the Ministry of the Environment is a partner in a series of binational Lakewide Management Plans (LaMPs).

Certificates of Approval and Licensing

The Ministry of the Environment approvals program has been designed to ensure that all undertakings requiring approval are carried out in accordance with legislation including the Ontario Water Resources Act, the Environmental Protection Act, the Pesticides Act, the Environmental Assessment Act, the Environmental Bill of Rights, the Safe Drinking Water Act and associated regulations. Certificates of Approval are required for facilities that release emissions to the atmosphere, discharge contaminants to ground and surface water, provide potable water supplies, or store, transport, process or dispose of waste. Proponents of these types of activities are required to obtain Certificates of Approval to ensure that the environment will not be adversely affected.
Certificates of Approval web page

The Ministry of the Environment is planning to implement a new approvals program - Municipal Drinking Water Licensing - to replace the existing Certificate of Approval process for municipal residential drinking water systems, in response to recommendations made in the Part II Walkerton Report.

In order to obtain a Licence for a municipal residential drinking-water system, an Owner must have:

  1. a Drinking Water Works Permit (DWWP);
    • a permit to construct or alter a drinking-water system that will replace Certificates of Approval for treatment and distribution, and will be simpler and more flexible
  2. an accepted Operational Plan;
    • the Plan will document the quality management system (QMS) and how the requirements of the Drinking Water Quality Management Standard (DWQMS) are met
  3. an accredited Operating Authority;
    • a third-party audit of the QMS will be the basis for accreditation
  4. an approved Financial Plan;
    • for the purposes of issuing a Licence, this requirement will be deferred until the regulations under the Sustainable Water and Sewage Systems Act are developed
  5. a Permit to Take Water (PTTW).
    • no anticipated changes to the current PTTW program for the purposes of issuing a Licence

On October 30, 2006, the Ministry posted five notices related to Municipal Licensing to the EBR Registry, including:

Policy Decision Notice

  1. Drinking Water Quality Management Standard

Policy Proposal Notices

  1. Drinking Water Quality Management Standard Guidance Document
  2. Director’s Direction for Operational Plan Submission
  3. Accreditation Protocol for Operating Authorities

Regulation Proposal Notice

  1. Prescribed Dates Regulation for the Municipal Drinking Water Licence Program

Written submissions on the proposal notices may be made between October 30, 2006 and December 29, 2006.

View Municipal Licensing backgrounder

Other Links

Resources
Sector Compliance Branch - a province-wide compliance team that inspects high risk businesses
Public Health Units Ministry of Health and Long-Term Care (MOHLTC)
Ontario Clean Water Agency - an arm's-length agency of the Government of Ontario that operates numerous municipal water systems on behalf of the municipalities.
Ontario Water Works Research Consortium - Taste and odour research

What's in this Section

WALKERTON AND THE O'CONNOR INQUIRY
PROTECTING DRINKING WATER QUALITY
The Chief Drinking Water Inspector
Acts and Regulations
Drinking Water Systems Regs
Owners and Operators Info
Laboratory Licensing
Monitoring and Compliance
Related Water and Sewage Treatment Links
Public Right to Request a Drinking Water Investigation
ADVISORY COUNCIL ON DRINKING WATER QUALITY AND TESTING STANDARDS
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CLEAN WATER ACT
WATERSHED-BASED SOURCE PROTECTION
Permits to Take Water
Nutrient Management
Groundwater studies
Water wells
Municipal/Industrial Strategy for Abatement (MISA)
RESEARCH AND PUBLICATIONS
GREAT LAKES AND INLAND LAKES
CERTIFICATES OF APPROVAL AND LICENSING
OTHER LINKS






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Last Modified: Wednesday November 01 2006