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Water Testing for Lead

Flushing and Testing for Lead in Drinking Water

As required by Ontario Regulation 243/07, Schools, Private Schools and Day Nurseries are required to carry out annual sampling and testing for lead. To view the Ministry of Environment’s Guide: “Flushing and Testing for Lead in Drinking Water” please visit this URL.

How long are records kept?

Records on flushing and testing must be kept for six years. The records for the most recent two years of flushing and testing must be available at the site of the facility for inspection by any member of the public during business hours, free of charge.

Elementary School Reports

Secondary School Reports

Weekly or Daily Flushing

Who Should Flush Their Plumbing

All schools, private schools and child care centres

How Often Should Plumbing Be Flushed?

How often you flush depends on several factors including:

DAILY – Flush daily if:

  • any part of your plumbing was installed prior to 1990 and you have fewer than two consecutive years of lead test results or
  • there has been an exceedance of the standard for lead in the past 24 months or
  • your facility has been directed to flush daily

WEEKLY – Flush weekly if:

  • any part of your plumbing was installed prior to 1990, you have at least two consecutive years of lead test results and there has been no exceedance of the standard for lead in the past 24 months or
  • no plumbing was installed prior to 1990 and there has been no exceedance of the standard for lead in the past 24 months

NO FLUSHING

Applicable to all fixtures, except for “end of branch” taps. Flushing is not required for:

  • fountains and taps where the most recent standing sample was at or below 1 μg/L, including with an NSF filter
  • taps that do not provide drinking water or are not used to prepare food or drink for children under 18

Resources