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 should I keep the records?
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.
Weekly or Daily Flushing
- Schools, private schools and day nurseries must flush their plumbing at least weekly if their lead
test results over the past 24 months (standing or flushed) meet or are below the drinking water
- If any samples from the previous 24 months exceeded the standard, the facility’s plumbing must
be flushed daily.
- Daily flushing would still be required at any facility directed to do so by the Ministry of the
Environment (the ministry).
- If a facility does not have test results from a full 24-month period, the flushing frequency is
determined by the age of the plumbing:
daily where any plumbing was installed before January 1, 1990, and
weekly if all of the plumbing was installed on or after that date.
- All flushing must be completed in the morning before the facility opens for the day or the week.
- Where a building is open overnight (e.g., student residences with communal washrooms),
flushing must be completed as early as possible.
- Flush cold water for at least five minutes from a tap at the end of each branch or run of pipe
in plumbing that serves taps or drinking water fountains commonly used to provide water for
consumption by children under 18 years of age.
- Follow this branch flushing with a 10 second flush of all taps and drinking water fountains that are likely to be used to provide water for consumption by children under 18 years of age.
To review this regulation, please visit http://www.e-laws.gov.on.ca/html/regs/english/elaws_regs_070243_e.htm