Westbury Water Hardness & Quality Report (2026)

The Westbury Water District draws all its drinking water from groundwater wells tapping into the Magothy Aquifer beneath Long Island, New York. This district serves residential and commercial customers within Westbury and nearby areas like the Village of Old Westbury, which also utilizes the Magothy Aquifer. Instead of surface water treatment plants, Westbury treats its water directly at wellheads to meet state and federal drinking water standards. The Long Island groundwater basin, specifically the Magothy Aquifer, acts as the watershed for this supply.

The Magothy Aquifer, part of the Long Island aquifer system, is characterized by unconsolidated sands and gravels from the Cretaceous period, formed in ancient coastal plain and deltaic environments. This geology, particularly the Magothy and underlying Raritan Formations, contains sediments rich in calcium and magnesium. As groundwater interacts with these materials, it dissolves these minerals, resulting in a moderately mineralized and moderately hard water supply typical of such sandy aquifer systems. Precipitation recharges the aquifer after percolating through overlying deposits.

Moderately hard water in Westbury can contribute to noticeable scale buildup in appliances such as water heaters and coffee makers, potentially reducing their efficiency and lifespan over time. You might also find that laundry feels stiffer, and soaps and detergents aren't quite as effective, requiring slightly more product for cleaning. Homeowners experiencing these issues often find relief by descaling fixtures annually or considering a water softener to help extend appliance life and improve cleaning. Westbury's tap water is safe to drink, meeting all EPA MCLGs, with extensive testing confirming compliance with state regulations.