Xenia Water Hardness & Quality Report (2026)

Xenia, Ohio, the Greene County seat — a major southwest Ohio Dayton suburban city with dramatic tornado history (Xenia is the Greene County seat — one of the most historically significant small cities in southwest Ohio; Xenia is best known nationally for the catastrophic tornado of April 3, 1974 (the 1974 Xenia tornado — one of the most destructive tornadoes in American history; the F5 tornado that struck Xenia on April 3, 1974, was part of the Super Outbreak of 1974, the largest tornado outbreak in recorded history; the Xenia tornado killed 33 people, injured hundreds, and destroyed a significant portion of the city; the tornado became one of the defining events in modern American meteorological history and remains the most significant natural disaster in Greene County history; Xenia was substantially rebuilt following the 1974 tornado, and a second major tornado struck in 2000)); Xenia is home of Wilberforce University (one of the most historically significant historically Black universities in the United States — Wilberforce University was the first private HBCU in America, founded in 1856 by the African Methodist Episcopal Church; the Wilberforce–Central State University corridor in Xenia Township is one of the most important historically Black university communities in Ohio), a diverse Greene County community with a significant African-American, Wilberforce University, and Dayton suburban population — draws its municipal water supply from the Little Miami River via the City of Xenia Water Division. Water hardness in Xenia measures 162 mg/L — classified as hard.

Xenia's hard supply reflects the southwest Ohio Greene County Little Miami River carbonate watershed's calcareous character. The Little Miami River at Xenia draws from Silurian Ohio dolomite and Ordovician limestone with limited softening, producing the hard 162 mg/L.

At 162 mg/L, Xenia residents face regular hard water challenges. Monthly descaling and water softeners are recommended. City of Xenia Water Division consistently delivers water meeting all Ohio EPA and federal EPA Safe Drinking Water Act requirements.