Beaver Dam Water Hardness & Quality Report (2026)

Beaver Dam Water Utility serves the city of Beaver Dam in Dodge County, Wisconsin, providing drinking water to approximately 16,617 residents. The utility sources its supply exclusively from groundwater wells, with treatment at facilities employing lime softening to address mineral content. Infrastructure is centered at 205 S. Lincoln Ave. The 2024 Consumer Confidence Report confirms compliance with all monitored parameters for the calendar year, and the utility earned an A grade (99.5) in the 2024 water quality report card for health compliance. Treatment includes lime softening alongside disinfection, with pH adjusted during softening for optimal distribution.

Groundwater originates within the Beaver Dam River watershed, part of the larger Rock River basin draining to the Mississippi. Underlying geology features Paleozoic sandstones and dolomites of the Cambrian-Ordovician sequence, including the prominent Mount Simon Sandstone aquifer. These formations, capped by glacial drift, yield a hard supply due to prolonged contact with carbonate rocks, elevating dissolved calcium and magnesium while maintaining stable mineral profiles characteristic of the region's confined aquifers.

Very hard water causes pronounced scale buildup in pipes, heaters, and fixtures, shortening the lifespan of water heaters, dishwashers, and washing machines by up to 50%. Soap efficiency drops, requiring more detergent, and spotting occurs on glassware. Regular maintenance includes annual descaling of appliances, installing sediment filters, and flushing hot water tanks. A water softener is strongly recommended to protect household plumbing. No specific PFAS, lead, or copper violations were noted in recent reports; asbestos and trace organics like diquat are monitored but below action levels.