Durham’s drinking water remains safe despite seasonal odours

Whitby, Ontario – The Region of Durham is assuring residents that municipal drinking water remains safe, even if an earthy or musty smell is present. These odours are caused by seasonal changes in Lake Ontario and are common in late summer and early fall.

Where: Municipal water supply systems across Durham Region, including the lakeshore communities served by Lake Ontario.

When: Taste and odour episodes typically occur in late summer or early fall and usually fade as lake temperatures cool.

Why: Naturally occurring compounds, geosmin and 2-Methylisoborneol, can create an earthy or musty smell. These compounds are not harmful to health and do not affect the safety or quality of the water.

Note: Laboratory testing, of both the raw and treated water, confirms that Durham’s municipal water meets all Ontario Drinking Water Quality Standards set by the Ministry of the Environment, Conservation and Parks.

To help improve the temporary taste and odour changes, refrigerate tap water, add ice cubes, or a few drops of lemon juice to help reduce odours. For more information about the municipal water supply systems in Durham Region, visit durham.ca. Annual Water Quality Reports are available online at durham.ca/water.

– 30 –

For media inquiries, please contact Corporate Communications.