Sharonville Water Hardness & Quality Report (2026)

Greater Cincinnati Water Works supplies Sharonville, Ohio, drawing water from the Ohio River watershed and the Great Miami Buried Valley Aquifer. The Richard Miller Treatment Plant treats river water, while the Charles M. Bolton Plant processes groundwater. This blended supply reaches Sharonville residents through GCWW's infrastructure. The Ohio River flows through Ordovician shales and limestones before reaching the region's flat till plains. Beneath the Great Miami Buried Valley Aquifer, Silurian dolomites and Niagaran reefs contribute to the water's mineral content. These carbonate-rich geological formations readily dissolve, leading to a hard water supply characteristic of this area.

This hard water can lead to limescale buildup in household pipes, water heaters, dishwashers, and washing machines, potentially reducing their efficiency and lifespan. Faucet aerators and showerheads are particularly prone to clogging, and boilers may face corrosion risks from mineral deposits. Homeowners can mitigate these issues through regular descaling with vinegar, annual flushing of water heaters, and replacing fixtures with low-flow options. Installing a water softener is often recommended to extend appliance longevity, improve the lathering of soaps, and prevent spotting on dishes and fixtures.

GCWW consistently meets or exceeds EPA standards for water quality, including strict adherence to lead and copper regulations. Treatment processes at both plants involve coagulation, sedimentation, filtration, and disinfection with chloramination. Recent reports show no PFAS exceedances, and the water's pH is maintained between 7.5 and 8.5 to control corrosion. While occasional fluctuations in the Ohio River might temporarily increase total organic carbon, advanced monitoring systems ensure safe water delivery with very few violations.