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Safe Drinking Water Test Results

Annual Safe Drinking Water Test Results

The safety of our students and staff is our top priority.

The Toronto District School Board (TDSB) tests drinking water sources at its 583 schools on a regular basis, in alignment with provincial regulations.

On July 1, 2017, the Ministry of Environment, Conservation and Parks (MECP) amended Ontario Regulation 243/07 (Schools, Private Schools and Child Care Centres) under the Safe Drinking Water Act, introducing new requirements for the annual testing of drinking water sources.

Based on the current regulation, school boards need to test all designated drinking water sources at a school over a three-year period (elementary schools and childcare centres), and a five-year period (high schools). Water samples are taken between May and October and are analyzed by an independent laboratory certified by the Ministry of Environment, Conservation and Parks (MECP).

Test results for lead in drinking water are posted on an annual basis consistent with our commitment to increase transparency and accountability. It also aligns with the TDSB’s Open Data initiative aimed to implement an online platform where the public can access published Board data on our Open Data Webpage.

Key Facts

  • The City of Toronto’s water treatment facilities are some of the best in the world. Designated drinking water sources in our schools are safe to drink from and are tested on a regular basis, according to provincial regulations.
  • Based on sampling results, a variety of corrective actions are taken, which may include more frequent flushing at individual fixtures or throughout the entire school.
  • From time to time, a drinking water source may be taken out of service to conduct upgrades or make repairs to the fixture/tap. The vast majority of TDSB schools have no reported lead exceedances in their drinking water. When exceedances do occur, they are dealt with immediately and corrective action is taken.
  • The vast majority of TDSB schools have no reported lead exceedances in their drinking water. When exceedances occur, immediate corrective measures are undertaken.
  • In Ontario, results over 10 ug/L (micrograms per liter) or ppb (parts per billion) of lead are considered exceedances. Ontario schools are subject to Ontario standards.
  • “Handwashing only” signs are a visual indicator that these fixtures won’t be tested. As a result, they are not considered designated drinking water sources. All students have access to a nearby safe drinking water source.
  • The pipes servicing TDSB facilities do not contain lead.
  • Parents are notified of exceedances ONLY when the entire facility is impacted.
  • Drinking water in our schools is tested for lead on a regular basis and our plumbing is regularly flushed, in accordance with provincial regulations.
  • As per our protocol, if a childcare centre or school receives a drinking water test result that is above the standard for lead set by the Ontario government, the Toronto District School Board, in consultation with Toronto Public Health, will take the required actions to resolve any exceedances to ensure student and staff safety.

Please see the Questions and Answers below for more information on drinking water in TDSB Schools.

How to View the Data

You can select a school by visiting our 'Find Your School' webpage. On each Individual school webpage there is a link on the left side entitled ‘Safe Drinking Water Test Results’. When selected, the link will take the visitor to a Landing Page that provides the context to understand the results data. At the end of that page will be that individual school’s Safe Drinking Water Test Results Report. Below is a sample of what a typical report looks like.

Sample Report

Annual Safe Drinking Water Test Results – ‘School Name’

Based on the results, all drinking water sources at the school are flushed daily. If you have any questions, please contact the school principal.

Fixture Number Fixture Location *Standing Sample *Flushed Sample Corrective Action (if needed) View Resampled Data (if applicable)
F-1109-001 Hallway outside gym 18 19 Fixture removed from service, replaced and resampled per Ont. Reg. 243/07 View Data

*Note: All figures above 10 ug/L (micrograms per litre) represent an exceedance of lead. Notes: As recommended by the Ministry of Environment, Conservation and Parks, fixtures are represented by letters and numbers. The letter T represents tap, F represents fountain and B represents bottle filling station.

Frequently Asked Questions

Designated drinking water sources are water sources designated for consumption such as:

  • Water fountains
  • Bottle filling stations
  • Taps in kitchens, food preparation areas, staff rooms and childcare areas

Please note that as recommended by the Ministry of Environment, Conservation and Parks, fixtures are represented by letters and numbers. The letter T represents tap, F represents fountain and B represents bottle filling station.

Yes. Drinking water in our schools is safe to drink. We follow Ontario regulations by annually testing, from May to October, our drinking water sources for levels of lead and flushing our plumbing on a regular basis to ensure the highest quality of drinking water.

Children up to six years old are more sensitive to the effects of lead because they are still developing, and their small bodies can absorb lead more easily than adults. That is why the legislation is written for schools and childcares. Buildings that house a full-time childcare or an alternative school for students under the age of 18 are required to be tested.

To test the water, two samples are taken: one is a “standing water” sample, which is taken from the tap/bottle filling station after all the water has been sitting for a minimum of six hours. The other is a “flushed” sample that is taken after running the tap/bottle filling station for a minimum of five minutes and letting it sit for 30 minutes.
Samples are sent to an independent lab certified by MECP.

When there is an exceedance in the “flushed” sample, the fixture is taken out of service to eliminate any potential risk to occupants of the building. Re-sampling or replacement of the fixture is done in accordance with the standards set out by Ontario Regulation 243/07.

When there is an exceedance in the standing sample, that specific fixture will be flushed daily.

The TDSB ensures a safe drinking water source is available within the school while individual fixture exceedances are being investigated or addressed.

Based on sampling results specific to your school, there are three options:

  • The school conducts weekly flushing on Mondays.
  • The school conducts weekly flushing on Mondays, and specific individual fixtures require daily flushing.
  • The school conducts daily flushing, Monday through Friday.

The provincial government doesn’t require school boards to notify parents when exceedances occur. However, when an exceedance impacts the entire plumbing system and the school is placed on an alternate drinking water method (e.g. water bottles), principals notify parents. These cases are rare because usually, only individual fixtures are impacted.

When an individual fixture is impacted (e.g. it needs to be replaced) and it is taken out of service, the school principal is informed, but no notification will be sent to parents. However, the TDSB will ensure that all students have access to a safe water source nearby.

In either instance, the principal is notified, and a corrective action is taken.

The City of Toronto’s water treatment facilities are some of the best in the world. The city is responsible for regularly testing the water supply that goes to your house, schools and other public institutions (e.g. hospitals, colleges and universities, etc.)..

As outlined in Ontario Regulation 243/07, school boards are responsible for annually testing drinking water sources, from May to October, for lead inside the schools.

Lead found in tap water usually comes from the corrosion of older fixtures or the solder that connects pipes. In certain circumstances, extended contact between standing water and these components can cause the lead to be released from the pipes.

When the tap is turned on, water that has been standing in the pipes may have accumulated lead levels that exceed Ontario’s standard for lead.

Toronto Public Health states that TDSB Buildings are not serviced by lead pipes, as buildings with more than six units do not have lead pipes, regardless of age. Lead is too soft to handle the pressure needed for these types of buildings.

However, it must be understood that lead is a naturally occurring element. Lead has many industrial uses and has been found in water systems since the late 1800s. It is also present in soil, food and indoor dust. Over the past few decades, exposure to lead has significantly decreased because of restrictions in the use of lead in gasoline, paint and solder.

Ontario’s surface and groundwater generally does not contain lead. If lead does occur naturally, the concentrations are typically extremely low and below the drinking water standard for lead. Where there are concentrations of lead in drinking water above the standard, the likely cause is from lead pipes servicing the premises, lead solder used in the plumbing, or fixtures containing high percentages of lead.

The amount of lead leaching into drinking water from plumbing components depends largely on the chemical characteristics of the water. In certain circumstances, extended contact between standing water and the components can cause the lead to be released from the pipes. When the tap is turned on, water that has been standing in the pipes may have accumulated lead levels higher than Ontario’s standard for lead. Flushing has been shown to reduce lead levels in drinking water fixtures. That is where flushing comes in; by flushing plumbing and fixtures, water that may have come in contact with lead plumbing is replaced with fresh water.

While the source of water is the same throughout the building, the “Handwashing only” signs are a visual indicator that these fixtures are not considered 'drinking water sources' and are not tested for lead. Instead, these fixtures/taps are to be used for hand washing and other classroom purposes only (e.g. washing brushes used in art classes or lab pipes).

Washing Hands Only Signal

If you have questions regarding drinking water in our schools, please contact your child’s school.