Well Water Testing

Well Wise is a program administered by the Ontario Ground Water Association to provide water testing for consumers and well contractors. 

To order a water test, call OGWA at 519-245-7194, Ext 101# and leave a message. We will return your call as soon as possible. You can also see below for a Well Wise order form.

Download and complete on your device. Save the completed form and email to: accounts@ogwa.ca  or  admin@ogwa.ca

OR  Print, complete and fax the order form to: 519-245-7196 

Well Wise Testing Form

Well Wise Order Form - Print or Save & Send - updated Jan 11, 2023

Well Wise Order Form - Fillable PDF

To download, right click on the link and choose "Save as" or download per browser type

    (Approx. 2-3 weeks for written test results once shipped to laboratory)

   For a full list of the tests included in each package, click here!

Why Test and What are you looking for?

Why test your well water?
Test your Well Water
by Mary Jane Conboy,
Executive Director Well Wise Resource Centre

Technical Support Document for Ontario Drinking Water Standards, Objectives and Guidelines

Well Wise - Results as Highlighted in Appendix A of the Ontario Drinking Water Standards (ODWS) Technical Support Document

What should I test for?


Well Aware Booklet for Well Owners: available in PDF only
Download the guide for well owners. The Well Aware booklet guides you through the life cycle of a well, how to maintain your well, and shows you how your well affects water quality.

Well Wise water testing is carried out by Paracel Laboratories Ltd., a member of OGWA.

Check your well water for bacteria contamination at least 3 times per year - spring, summer, and fall. Free testing for E. Coli and Coliform bacteria is available from your local Public Health Unit.

For more information on water testing through your Public Health Unit,

Call ServiceOntario, INFOline at:
1-866-532-3161 (Toll-free)   |   In Toronto, (416) 314-5518
TTY 1-800-387-5559  |   In Toronto, TTY 416-327-4282
Hours of operation : 8:30am - 5:00pm

Test Your Well Water!

If you don't test your water, how do you know what is in it?

The Safe Drinking Water Act, 2002 (SDWA) requires that testing of drinking water be performed by approved and licenced laboratories. All Well Wise drinking water tests are carried out by Paracel Laboratories Ltd., a laboratory approved under this Act by the Ontario Ministry of the Environment.

A survey conducted in 1991/92 of 1200 rural wells in Ontario found:

  • 14% high for nitrate
  • 34% high for bacteria
  • 6 wells exceeded for pesticides