Lexington Water Hardness & Quality Report (2026)

Lexington's water supply is managed by Kentucky American Water – Central Division, which serves Fayette, Clark, Scott, Jessamine, Harrison, Bourbon, and Woodford counties. The utility operates three treatment plants: Kentucky River Station, Richmond Road Station, and Kentucky River Station II. Raw water sources are entirely surface water, drawn from pool 9 of the Kentucky River south of Lexington in Fayette County, Jacobson Reservoir in Fayette County, and pool 3 of the Kentucky River in Owen County — supplying approximately 42 million gallons per day to customers.

Lexington's supply originates in the Kentucky River watershed, which flows through the Inner Bluegrass region underlain by Ordovician and Silurian limestone and dolomite formations. These carbonate bedrock units are highly soluble — as surface water percolates through them, it dissolves significant quantities of calcium and magnesium minerals. This geological setting is responsible for the characteristically hard water supply. The limestone-dominated drainage basin imparts a high mineral content and natural buffering capacity, with treatment plant alkalinity measuring 79 mg/L.

Very hard water in Lexington causes substantial scale buildup on fixtures, water heaters, dishwashers, and washing machines, reducing effectiveness and shortening appliance lifespan. Soap and detergent efficiency declines noticeably, and fixtures show white mineral deposits. Most households benefit from installing a water softener to extend appliance life and reduce maintenance demands, though some residents prefer the taste of unsoftened water. Kentucky American Water's treatment uses conventional coagulation, sedimentation, filtration, and chlorination. Lead levels are undetected at the 90th percentile, meeting EPA action levels, and the utility publishes detailed data in its annual Consumer Confidence Report.