West Lafayette Water Hardness & Quality Report (2026)

Indiana American Water serves the City of West Lafayette and portions of Wabash and Tippecanoe townships in Tippecanoe County, Indiana, providing approximately 3.8 million gallons per day to around 45,000 residents. The utility sources water exclusively from groundwater via eight wells across two well fields in the Wabash River Valley. Treatment occurs at the Davis Ferry Water Treatment Plant and Happy Hollow Water Treatment Plant, where processes include disinfection, fluoridation, and ongoing compliance monitoring for a range of regulated contaminants.

The Wabash River watershed encompasses the service area, with groundwater recharged through local precipitation infiltrating surficial deposits. The underlying Paleozoic limestone and dolomite formations — part of the Mississippian and Devonian systems — form the primary aquifers. These carbonate rocks naturally dissolve over time, yielding a supply very rich in calcium and magnesium minerals. Overlying glacial till and alluvial sediments further influence recharge dynamics and mineral dissolution throughout the well fields.

At 350 mg/L (very hard), scale buildup accelerates in water heaters, dishwashers, washing machines, and coffee makers, reducing efficiency by up to 50% and shortening appliance lifespan. Faucet aerators and pipes clog, increasing energy bills and maintenance needs. Regular descaling with vinegar, installing drain screens, and pre-rinsing dishes are recommended; a water softener is strongly advised. Water pH averages 7.7; lead is non-detect and copper at 0.565 mg/L — both within compliance limits. Notable contaminants including uranium, arsenic, nitrates, and TTHMs meet EPA legal limits; fluoride is maintained at 0.80 mg/L.