Ontario: Report of Chief Drinking Water Inspector

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.