Jeffersonville Water Hardness & Quality Report (2026)

Indiana American Water serves the Greater Jeffersonville Area, including Jeffersonville, New Albany, and Clarksville in Clark County, Indiana. The utility operates 17 groundwater wells as the primary supply source, delivering an average of 15.4 million gallons per day. Water is treated with chlorine disinfection to maintain quality in the distribution system. No specific treatment plant names are listed in available data, but groundwater is drawn from local aquifers without softening, with no surface water contributions and full annual reporting per state standards.

The watershed encompasses the karst terrain of southern Indiana along the Ohio River, where Devonian-age Jeffersonville Limestone and Silurian Niagaran dolomite formations prevail. These soluble carbonate rocks dissolve over time to release calcium and magnesium ions into the groundwater. The area's karst topography — characterised by underground drainage and caves — facilitates rapid infiltration of rainwater through fissures, enhancing mineral dissolution. The resulting water is characteristically hard, typical of limestone-dominated watersheds in the Ohio River Valley karst belt.

Hard water at 182 mg/L promotes significant scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Dry skin, soap scum, and spotting on dishes are common effects. Regular vinegar descaling, installing scale inhibitors, and flushing water heaters annually is advised. A water softener is strongly recommended to mitigate these effects and protect appliances. The 2024 report shows pH averaging 7.47 (range 7.29–7.66), hardness averaging 182 ppm (range 158–209 ppm), sulfate averaging 43.0 ppm, and sodium 21.2 ppm; no PFAS or notable contaminants were reported above limits.