Lewiston Water Hardness & Quality Report (2026)

The Lewiston Water Division serves over 36,000 residents in Lewiston, Maine (Androscoggin County). The utility draws its water supply exclusively from Lake Auburn, a surface water reservoir, and operates treatment facilities that employ chloramines, hypochlorite, and UV light disinfection to ensure safe drinking water delivery throughout the service area. The water division is located at 103 Adams Avenue, Lewiston, ME 04240 and can be reached at (207) 513-3003. The utility's annual Consumer Confidence Report provides detailed water quality and regulatory compliance data for residents.

Lewiston's water originates in the Androscoggin River watershed, which drains the New England Uplands of central Maine. The underlying geology consists of Precambrian metamorphic bedrock — primarily schist and gneiss — overlain by glacial deposits of sand, gravel, and clay. Lake Auburn, the primary source, sits within this glacially-sculpted landscape. The bedrock and glacial mineral composition contribute to the moderately hard character of the supply, a profile typical of New England surface waters that reflects the region's ancient metamorphic terrain.

At moderately hard levels, Lewiston residents may experience moderate soap scum buildup, some scale formation in water heaters and kettles, and reduced efficiency of detergents and soaps. Dishwashers and washing machines may show gradual mineral deposits over time. A water softener is often recommended for households seeking to reduce these effects, though many residents manage without treatment. Lewiston's water meets EPA legal standards but has received a Fair (C) grade from independent water quality evaluators; the utility reports detection of multiple contaminants above health advocacy guidelines, all within legal limits, and treatment includes chloramination and UV disinfection.