Kensington Water Hardness & Quality Report (2026)

Kensington, Brooklyn is served by the New York City Department of Environmental Protection (DEP), which supplies water to all five boroughs including Kings County. Primary sources are the Catskill/Delaware upstate reservoirs — including Ashokan, Schoharie, Rondout, and Neversink — blended with Croton watershed reservoirs such as New Croton Lake. Water is treated at major facilities including the Catskill/Delaware Ultraviolet Disinfection Facility and Croton Watershed filtration plants before distribution through city tunnels and aqueducts to Brooklyn's local mains.

The Catskill/Delaware watershed spans the Catskill Mountains and Delaware River basin, underlain by metamorphic and sedimentary rocks including Hudson River shales and sandstones from the Ordovician–Devonian periods. The Croton system draws from igneous and metamorphic bedrock in the Hudson Highlands. This geology of Precambrian–Paleozoic schist, gneiss, and glacial till with Devonian sandstones involves minimal limestone contact, yielding naturally soft water from the Catskill/Delaware supply; blended with the moderately mineralised Croton component, the result is a soft to moderately hard character citywide, with protected forested lands enhancing source purity.

As soft to moderately hard water, Kensington's supply minimizes scale buildup in pipes, water heaters, and dishwashers, though blended areas may see minor deposits on coffee makers and washing machines. Regular vinegar rinses or deliming help manage minor scale; full water softeners are rarely needed given the low mineral content. NYC DEP maintains EPA compliance with pH typically 6.5–8.5, lead and copper rules met via corrosion control and pipe replacement, and no widespread PFAS exceedances reported. Treatment includes UV disinfection, chlorination, fluoridation, and pH adjustment — no filtration required for Catskill/Delaware due to pristine source — with annual Drinking Water Supply and Quality Reports confirming full compliance.