Rothesay Water Hardness & Quality Report (2026)

Rothesay's drinking water is managed by the Town of Rothesay, drawing from the Hammond River watershed or a local Kings County surface water source — Rothesay is an affluent suburban town on the east side of the Saint John River east of Saint John in Kings County New Brunswick, one of the most prosperous municipalities in Atlantic Canada, a community of large heritage homes and estate properties on the Saint John River escarpment and the Hammond River valley, a popular retirement destination for Saint John professionals and executives with deep historical ties to the Loyalist settlement tradition of the Saint John River valley. Water undergoes coagulation, sedimentation, filtration, UV disinfection, and chloramination, fully meeting the Guidelines for Canadian Drinking Water Quality (GCDWQ). Hardness measures 29.5 mg/L (1.7 gpg) — classified as soft by Health Canada, consistent with the Kings County NB Appalachian surface water character.

Rothesay draws from the Hammond River watershed or a local Kings County surface water source — the Hammond River and the Kings County watershed in the Saint John River east bank corridor drain the Caledonia Highlands and Kingston Peninsula Appalachian terrain of southern New Brunswick, underlain by Precambrian and Cambrian metasedimentary rocks with very low carbonate content. The 29.5 mg/L is consistent with the broader NB surface water range (Saint John 35 mg/L from batch 27), reflecting the characteristically soft water of the NB Appalachian metasedimentary watershed.

With 29.5 mg/L, Rothesay homes are essentially scale-free — occasional kettle cleaning every three months is adequate. Hot water tanks have an excellent operational lifespan. The Town of Rothesay provides water quality information at rothesay.ca. Health Canada lead precautionary guidance applies to pre-1975 properties in Rothesay's established heritage residential neighbourhood and the historic Loyalist-era homes near the Grand Bay waterfront.