About your drinking water
We take the responsibility of providing clean, safe drinking water to you very seriously. The Tamsin River Water Treatment Plant treats water drawn from the Tamsin River and Corvid Creek. Before it reaches your taps, the water undergoes rigorous testing and treatment to meet or exceed the Guidelines for Canadian Drinking Water Quality and Ontario regulations.
Our laboratories conduct thousands of tests each year on drinking water, distribution pipes, and source water. We monitor parameters like pH, turbidity, chlorine residual, and microbiological safety on a daily basis. You can view the results below.
Monthly water quality summaries
Each month, we publish a summary of all tests run on treated and delivered water. These summaries show how the water compares to provincial limits and aesthetic guidelines.
- July 2026 Water Quality Summary (PDF)
- June 2026 Water Quality Summary (PDF)
- May 2026 Water Quality Summary (PDF)
- April 2026 Water Quality Summary (PDF)
- March 2026 Water Quality Summary (PDF)
- February 2026 Water Quality Summary (PDF)
- January 2026 Water Quality Summary (PDF)
Annual reports and source water data
Each year we compile a full report covering water quality trends, infrastructure updates, and compliance. We also publish source water monitoring data from the Tamsin River.
- 2025 Waterworks Utility Annual Report (PDF)
- 2024 Water Quality Annual Summary (PDF)
- 2023 Water Quality Annual Summary (PDF)
- 2022 Water Quality Annual Summary (PDF)
- 2021 Water Quality Annual Summary (PDF)
For historical data going back further, please check the Old Mill Museum & Archives or contact the Water Operations team directly.
Questions about water quality?
If you have concerns about your water, need a copy of a specific report, or want to learn more about how we protect the Tamsin River watershed, reach out to the Water Operations team.
Phone: 519-555-0100
Email: [email protected]