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Health Unit promotes Well Water Testing on World Water Day

March 22, 2024

The Leeds, Grenville and Lanark District Health Unit is celebrating World Water Day on March 22, 2024. In Ontario we are fortunate to have an abundance of drinking water and it is important to conserve what we have. Not all drinking water sources in Ontario are safe so it is important to test and install treatment if necessary.  Our municipalities take good care of our municipal drinking water systems. If your drinking water comes from a private well, it’s up to you to test and possibly provide a treatment system for the water.

Spring is a great time to have your well water tested for bacteria. Run off from heavy rain may affect the safety of your drinking water. Bacteria in your well water may not affect the taste or smell. Testing your well water is the only way to know for sure if your drinking water is safe. The Health Unit recommends that you test your well water at least three times a year for bacteria.

Sampling bottles can be picked up and dropped off from nine different locations where they will be couriered to an Ontario Public Health Laboratory for analysis. Always check the website to see if there are changes to locations. More information can be found on the Drinking Water page of the Health Unit’s website: Drinking Water – Leeds, Grenville and Lanark District Health Unit.

If the testing shows the well water is contaminated with bacteria, some actions may be required to protect your health. The Health Unit website contains instructions on how to disinfect your well and information on different types of treatment units that can be installed.

In addition to bacteria, some chemical elements that can affect health may also be found in your well water. The most common chemical elements that can affect your health and may be found in Canadian well water are: Nitrate and nitrite, sodium, naturally occurring Manganese, Arsenic, Uranium and Lead.

If you are concerned with chemical contamination of your well water, contact a private laboratory for testing. A list of licensed laboratories can be found on the Health Unit website. List of Licensed Laboratories |

You can also check out the Canadian Drinking Water Guidelines –

For more information, call us at 1-800-660-5853 or connect with us on Facebook and follow us on X @LGLHealthUnit. We are also now on Instagram @lglhealthunit.z.


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