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Well Water Safety

Well Water Sampling

Taking a water sample from your well is the BEST way to determine the quality of your drinking water, and to protect yourself and your family from becoming ill.

There are two types of water testing that should occur:

  1. Bacteriological
    a. at least 3 times a year, usually once every 3 to 4 months
    b. more frequently if well has history of water quality problems or is a high-risk well , e.g., shallow

  1. Chemical
    a. Nitrate-Nitrogen - at least once a year
    b. Sodium - at least once a year
    c. Other chemicals if you have concerns, e.g., fuel spills, sulphur


Contact If...

How to Locate

Public Health Lab

  • Water samples are tested at the Provincial Laboratory in Peterborough for Durham Region residents.

  • Durham Region residents are to submit their water samples at drop-off locations.

  • Contact the Ministry of Health and Long-Term Care INFOline at 1-800-268-1154

Private Accredited Lab

  • Chemical water testing

  • Information of accredited laboratories, contact Ministry of the Environment

Public Health Unit

  • You suspect that surface water, or human or animal waste, have entered your well

  • You require water sample bottles for indicator bacteria testing

  • You require help in interpreting your water quality sample results

  • Health Department Environmental Help Line at

Licensed Well Contractor

  • You require upgrading or maintenance for your well

  • You have concerns that your well is improperly constructed

  • See the listings under the "Water Well Drilling & Services" heading in your local Yellow Pages

  • Ensure they are licensed to provide this service