Lawrence Water Hardness & Quality Report (2026)

The City of Lawrence Utilities Department serves Lawrence in Douglas County, Kansas, delivering drinking water through two primary treatment plants. The Kaw Water Treatment Plant (16.5 MGD capacity) draws from the Kansas River and six alluvial groundwater wells along the riverbanks. The Clinton Water Treatment Plant (25 MGD capacity) sources water from Clinton Lake (Clinton Reservoir), a man-made reservoir on the Wakarusa River. Both facilities meet EPA and Kansas Department of Health and Environment standards, with no violations reported in 2023. Treatment involves conventional coagulation, sedimentation, filtration, and disinfection.

The Kansas River watershed is part of the larger Missouri River basin, draining agricultural and urban lands upstream, while Clinton Lake is fed by Wakarusa River tributaries in the same basin. Groundwater comes from the shallow Kansas River Alluvium aquifer, composed of unconsolidated sand and gravel overlying Permian-age bedrock including the Wellington Formation — limestone- and dolomite-rich strata. Alluvial sediments dissolve calcium and magnesium carbonate minerals into the mixed supply, imparting a characteristically hard water profile through natural leaching across the sedimentary basin.

Hard water in Lawrence causes scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and shortening appliance lifespan. Faucets and fixtures develop limescale rings, and laundry can feel stiff without softeners. Regular maintenance — deliming appliances and vinegar soaks for showerheads — is recommended, along with installing a whole-house water softener to extend equipment life. The 2023 Consumer Confidence Report confirms compliance with all federal standards; third-party testing notes arsenic above health guidelines from natural soil sources. No specific PFAS data is available in reported sources.