Henrietta Water Hardness & Quality Report (2026)

Henrietta, New York, in Monroe County south of Rochester — a major Rochester south suburb home of the Rochester Institute of Technology (RIT, one of the largest private universities in the US, internationally known for technology and arts programs, deaf and hard-of-hearing education, and the Rochester Brickyard hockey arena), a major Monroe County commercial and retail hub (Marketplace Mall), and a diverse suburban community in the greater Rochester metro area — draws its municipal water supply from Lake Ontario via the Monroe County Water Authority (MCWA). Water hardness in Henrietta measures 142 mg/L — classified as moderately hard.

Henrietta's moderate hardness reflects the Monroe County water supply's calcareous western New York geology. The MCWA Lake Ontario supply — while moderately soft at source (Lake Ontario typically 100–115 mg/L from the Great Lakes basin), passes through the Monroe County distribution infrastructure. The Monroe County calcareous geology (Silurian Rochester Shale and Lockport Dolomite, the Devonian Onondaga Limestone — all highly calcareous carbonate formations typical of western New York and the Niagara frontier) contributes to MCWA well field hardness and distribution mineral accumulation, producing the moderate 142 mg/L at Henrietta.

At 142 mg/L, Henrietta residents encounter moderate-to-hard scale accumulation. Monthly cleaning with citric acid solution is recommended for faucet aerators and showerheads. Monroe County Water Authority consistently delivers water meeting all New York State DOH and EPA Safe Drinking Water Act requirements.