Canadian Municipal Water eBulletin

Ontario: Report of Chief Drinking Water Inspector

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Get information on the performance of Ontario’s regulated drinking water systems and laboratories, drinking water test results, and enforcement activities and programs.

In 2016-2017:
  • 99.84% of 517,601 drinking water test results from municipal residential drinking water systems met Ontario’s strict drinking water quality standards.
  • 99.4% of 661 municipal residential drinking water systems received an inspection rating indicating compliance of over 80% with Ontario’s strict regulations. 465 systems or 70% of systems inspected had a perfect rating of compliance.
  • 96.14% of 15,380 test results met our standard for lead in drinking water at schools and child care centres. When looking at flushed samples only, this number rises to 98%. This is up from 94% when the program began in 2007.

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