South Ozone Park Water Hardness & Quality Report (2026)

South Ozone Park, in Queens County, New York, is served by the New York City Department of Environmental Protection (NYC DEP), supplying over 8 million residents across the five boroughs and parts of Westchester County. Water originates from 19 reservoirs and 3 controlled lakes in the Catskill/Delaware and Croton watersheds, totaling over 500 billion gallons of storage capacity. Key sources include the Catskill/Delaware system — including Ashokan, Schoharie, and Rondout reservoirs — providing roughly 90% of supply, and the Croton system including New Croton Lake. Treatment employs UV disinfection at the Delaware Aqueduct and chlorination for distribution; fluoridation is applied at 0.7 mg/L.

The Catskill/Delaware Watershed spans 1,600 square miles across Ulster, Greene, Delaware, and Schoharie counties, underlain by Devonian-age shales and sandstones of the Catskill Formation with minor limestone lenses — limiting mineral dissolution for a soft baseline. The Croton Watershed covers 375 square miles in Putnam and Westchester counties, featuring crystalline bedrock of the Fordham Gneiss and Manhattan Schist (Proterozoic age), which weather slowly to impart moderate mineralisation. Blending these supplies in Queens distribution systems produces a moderately mineralised character overall.

Moderately hard water leads to moderate scale buildup on fixtures, kettles, and glassware, reducing soap lather and spotting dishes. Dishwashers, washing machines, coffee makers, and water heaters are most affected — mineral deposits can cut efficiency by 20–30% over time. Monthly vinegar cleaning of showerheads, rinse aids in dishwashers, and low-flow aerators are recommended. A water softener is advisable for households noticing dry skin or soap scum. NYC DEP water meets or exceeds EPA standards; PFAS levels are low (below 4 ppt), lead/copper compliance is strong via orthophosphate dosing, and TTHMs and haloacetic acids are well below MCLs.