Kenora Water Hardness & Quality Report (2026)

Kenora's drinking water is managed by the City of Kenora, drawing from Lake of the Woods — the city of Kenora is the primary urban centre of Northwestern Ontario, situated on the Lake of the Woods at the Manitoba border, a jewel of the Canadian Shield with thousands of islands, world-class bass and muskie fishing, and the famous Anicinabe (Anishinaabe) heritage of the Wabigoon Lake Ojibway and Treaty Three territory, a tourism and service hub for the vast Northwestern Ontario boreal forest. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, meeting all Guidelines for Canadian Drinking Water Quality (GCDWQ) requirements. Hardness measures 71 mg/L (4.1 gpg) — classified as moderately hard by Health Canada, consistent with the Lake of the Woods watershed supply character.

Kenora's Lake of the Woods is a massive 3,149-km² lake straddling the Ontario-Manitoba-Minnesota border, draining a vast Precambrian Shield watershed of Archean and Proterozoic granites, gneisses, and greenstone belts in the Canadian Shield. The 71 mg/L represents the moderate mineral content of this Shield lake — harder than the deep Shield lakes (Lake Superior is very soft at ~10 mg/L) but reflecting the Lake of the Woods' transition zone position between the Shield and the adjacent agricultural Ontario-Manitoba lowlands where some carbonate mineral input occurs from the fringing Ordovician limestone terrain to the south and east.

At 71 mg/L, Kenora homes experience light scale deposits — occasional kettle cleaning every two months is adequate. Hot water tanks have a good operational lifespan. The City of Kenora provides water quality information at kenora.ca. Health Canada lead precautionary guidance applies to pre-1975 residential properties in the historic Kenora townsite and the established residential areas on the Lake of the Woods shoreline.