Nicholasville Water Hardness & Quality Report (2026)

Nicholasville, Kentucky, the Jessamine County seat — a major central Kentucky Lexington suburban city (Nicholasville is the Jessamine County seat and one of the fastest-growing cities in Kentucky — a south Lexington suburban community that has grown dramatically as the Lexington metro has expanded south along US-27; Nicholasville is one of the most significant south Lexington suburban communities, known for its horse farm countryside (the Jessamine County Inner Bluegrass landscape south of Lexington retains significant thoroughbred horse farm properties — rolling limestone landscape with traditional bourbon distillery heritage)), a diverse Jessamine County community with a primarily working-class and middle-class suburban family and professional population, adjacent to Wilmore and Harrodsburg in the south Jessamine County corridor, home of Asbury University (a significant Christian liberal arts university in Wilmore, adjacent to Nicholasville), and one of the rapidly growing Lexington south suburban communities — draws its municipal water supply via the Jessamine County Water Service District. Water hardness in Nicholasville measures 199.5 mg/L — classified as hard.

Nicholasville's hard supply reflects the central Kentucky Jessamine County Inner Bluegrass Ordovician limestone karst's highly calcareous character. The Inner Bluegrass aquifer draws from the Ordovician Lexington Limestone (highly calcareous marine carbonate karst). Jessamine County Water applies limited softening, producing the hard 199.5 mg/L.

At 199.5 mg/L, Nicholasville residents face regular hard water challenges. Monthly descaling and water softeners are recommended. Jessamine County Water Service District consistently delivers water meeting all Kentucky DEP and EPA Safe Drinking Water Act requirements.