Dobbs Ferry Water Hardness & Quality Report (2026)

SUEZ Water Westchester County supplies drinking water to Dobbs Ferry, Hastings-on-Hudson, and Ardsley. The primary sources are surface water from the New York City Croton System, including Croton Lake and Titicus Reservoirs, with supplemental water from local groundwater wells. Treatment takes place at the Croton Filtration Plant and other SUEZ facilities, ensuring compliance with state and federal drinking water standards for the roughly 11,000 residents in Dobbs Ferry's 3-square-mile service area.

The region's water originates from the Croton Watershed, a 375-square-mile area north of New York City. The underlying geology features Precambrian gneiss and schist in the uplands, along with Fordham Gneiss and Manhattan Schist formations. Groundwater is drawn from glacial outwash sands and fractured bedrock aquifers within the Kensico-Croton system. This mixed geology results in a moderately mineralized water profile, as surface water picks up ions from sedimentary layers and well water reflects local mineral dissolution.

Scale buildup in appliances like dishwashers, washing machines, and water heaters is a common consequence of this water's mineral content, potentially reducing efficiency and increasing energy costs over time. Homeowners might notice clogged faucet aerators and coffee makers, leading to spotty dishes. For households experiencing appliance wear or spotting, a whole-home water softener is advisable. Regular descaling with vinegar can help manage mineral deposits. SUEZ's reports indicate compliance with EPA standards for parameters like pH, lead, copper, and disinfection byproducts, with ongoing monitoring for PFAS monitoring for substances such as PFAS.