Henrietta Water Hardness & Quality Report (2026)

Henrietta, New York is served by the City of Rochester Water Bureau, which sources drinking water primarily from Hemlock and Canadice Lakes (in operation since 1876) and supplements supply with Lake Ontario water purchased from the Monroe County Water Authority (MCWA). Water from the lakes is treated at the Hemlock Filtration Plant and flows by gravity through three large 100-year-old pipelines to the city. MCWA-supplied water is treated at the Shoremont Treatment Plant on Dewey Avenue. Treated water is stored in three city reservoirs, re-disinfected, and distributed through over 500 miles of water mains throughout Monroe County.

Henrietta's water originates in the Finger Lakes watershed, a region shaped by Pleistocene glaciation. The underlying geology consists of Devonian-age shales and siltstones overlying Ordovician limestone and dolomite formations. Glacial deposits — including clay, silt, and sand — blanket the bedrock. As water percolates through these glacial materials and limestone-rich bedrock, it dissolves calcium and magnesium minerals, resulting in a moderately hard supply characteristic of the region. Hemlock and Canadice Lakes are oligotrophic glacial lakes with relatively stable mineral content.

At moderately hard levels, Henrietta residents may notice some scale buildup on fixtures and reduced soap lathering, though effects are less severe than in hard-water regions. Water heaters, dishwashers, and washing machines may accumulate mineral deposits over time, reducing efficiency and lifespan. A water softener is not strictly necessary but may benefit households concerned with scale prevention and appliance longevity; regular descaling and water-softening additives in washing machines can mitigate buildup. The water is fluoridated at approximately 0.7 parts per million for dental health. MCWA water quality reports confirm consistent compliance with EPA standards, though bromodichloromethane (a trihalomethane disinfection byproduct) has been detected above health guidelines in some historical samples, prompting ongoing treatment optimization.