Hillside Water Hardness & Quality Report (2026)

Hillside Acres Public Water Supply System (P.W.S.) serves the Hillside Acres community in Nassau County, New York, operating as a private or small public system under New York State Department of Public Service oversight. Water is sourced from local groundwater wells tapping Long Island's aquifers. Treatment occurs at the system's facilities using filtration, chlorination, and ultraviolet disinfection to address pathogens including Cryptosporidium and Giardia. No specific treatment plant names are detailed in available reports, but the 2024 Annual Drinking Water Quality Report confirms full compliance with state standards across over 80 tested parameters.

The supply originates from Long Island's glacial aquifer system. Key formations include the Upper Glacial aquifer — sands and gravels deposited during the last ice age — and the underlying Magothy aquifer, both recharged by precipitation and limited surface runoff. The Pleistocene Magothy Formation consists of deltaic sands and clays. This geology features limited limestone or dolomite, yielding naturally soft water with low dissolved solids due to the predominance of siliceous sands over carbonate rocks.

As a soft water supply, Hillside Acres experiences negligible scale buildup in pipes and appliances, reducing maintenance demands on water heaters, dishwashers, and laundry machines. Soap and detergents lather efficiently without excess use, and no significant spotting occurs on glassware. A water softener is not recommended and could unnecessarily strip beneficial minerals; routine filter changes and chlorine monitoring for taste are sufficient. No E. coli, Cryptosporidium, or Giardia were detected in source water; specific pH, lead/copper, or PFAS data are unavailable in summaries, but the system met all health benchmarks.