Well Water Testing

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

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.

Click for well water testing at 'My Water Quality'...

Click the image to visit My Water Quality for well water testing services.

OGWA Members providing direct laboratory testing services:
(Click images to visit websites)



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