Is Ottawa tap water safe to drink?

Ottawa tap water is safe to drink. Ottawa's municipal water supply consistently meets or exceeds Health Canada's Guidelines for Canadian Drinking Water Quality, and the City of Ottawa publishes regular water quality reports confirming this.

Ottawa's Water Treatment Process

Ottawa's drinking water comes primarily from the Ottawa River and is treated at the Lemieux Island and Britannia water purification plants. The water goes through multiple treatment stages including filtration, UV disinfection, and chlorination before it reaches your tap. The City of Ottawa's Environmental Protection and Wastewater Services division monitors water quality continuously.

The One Exception: Older Lead Service Lines

While the municipal water itself is clean, older homes in Ottawa (pre-1955 era) may have lead service lines connecting the city main to the house. Lead can leach into water as it sits in these pipes, which is a legitimate health concern — especially for young children and pregnant women. The City of Ottawa has an ongoing lead pipe replacement program, and you can contact the city to find out if your home is affected.

What Can Affect Your Tap Water Quality

Even with clean municipal water, the condition of your home's internal plumbing matters. Older galvanized steel pipes can introduce rust and sediment. A failing water heater can affect hot water taste and quality. If your water has a strange taste, odor, or discoloration, that's often a sign of an issue within your home's plumbing rather than the municipal supply.

When to Take Action

If you notice rust-colored water, a rotten egg smell, or a metallic taste, don't ignore it. These are signs worth investigating. A plumber can inspect your pipes and water heater, and you can also request a free water quality test through the City of Ottawa. If you're concerned about your home's plumbing condition, Ottawa Pro Plumbing offers inspections and can assess whether aging pipes may be affecting your water quality.