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Ontario's drinking water meeting stringent safety and quality standards

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Ontario's drinking water meeting stringent safety and quality standards

Chief Drinking Water Inspector Releases Annual Report

Ontarians can be confident their drinking water meets high quality standards according to the most recent report from the province's chief drinking water inspector.

Key results from water quality tests from municipal residential drinking water systems conducted in 2006-2007 show that Ontario's rigorous health-based standards were met in 99.83 per cent of tests. Similarly, 99.40 per cent of results from testing conducted on non-municipal year round systems and 99.49 of results from testing on systems serving designated facilities show that Ontario's standards were being met.

The annual report from the Chief Drinking Water Inspector provides information on the quality of the water Ontarians get from their taps. The report also provides statistics on inspections of drinking water systems and licensed laboratories.  

Ontario's multi-barrier approach is working to safeguard drinking water from source to tap. It includes timely and reliable testing, rigorous training and certification of operators, comprehensive inspections and enforcement of regulations. Inspections conducted by the Ministry of the Environment help:

  • ensure systems deliver safe drinking water,
  • municipalities and other owners continually improve their operations to keep providing safe drinking water.

Quick Facts

  • More than 80 per cent of Ontarians get their water from municipal residential drinking water systems.
  • The ministry inspected all 707 municipal residential drinking water systems in 2006-07.
  • 92 per cent of municipal residential drinking water systems received an operational performance inspection rating over 90 per cent.

Background Information

Additional Resources


“Ontarians can be confident in the quality of their drinking water. With measures like the Clean Water Act, our government has created an effective safety net for our drinking water systems, making our tap water among the best protected in the world.”

John Gerretsen

Minister of the Environment

“Rigorous inspections are helping us and municipalities identify and address drinking water issues effectively. I remain committed to continuous improvement and will work with municipalities and other owners to achieve 100 per cent compliance with Ontario’s regulatory requirements.”

Keith West

Chief Drinking Water Inspector



Environment and Energy