North Merrick Water Hardness & Quality Report (2026)

New York American Water supplies approximately 22,097 residents in North Merrick, Merrick, Bellmore, North Bellmore, Seaford, Wantagh, and parts of Levittown, Massapequa, and East Massapequa in Nassau County, New York. Their water originates from 16 groundwater wells drawing from the local aquifer system beneath Long Island. Standard groundwater treatment, including disinfection and corrosion control, occurs at wellhead facilities, as there are no surface water treatment plants. The watershed is essentially Long Island's groundwater recharge area, where precipitation filters through glacial deposits into the subsurface aquifers.

The water comes from the Upper Glacial aquifer, composed of Pleistocene sands and gravels, and the deeper Magothy aquifer, part of the Northern Atlantic Coastal Plain. This geology, characterized by sandy strata with minimal limestone, naturally results in soft water. The low concentration of dissolved minerals like calcium and magnesium means little mineral pickup, giving the water a low total dissolved solids (TDS) character that requires no significant softening.

Because the water is soft, you'll find it poses minimal risk of scaling in your plumbing, leaving little to no mineral deposits on pipes or fixtures. Appliances such as water heaters and dishwashers should see extended lifespans without the buildup typically caused by hard water. Soap lathers easily, so you won't need to use excessive amounts of detergent. While a water softener isn't necessary, basic filtration might be considered if you have concerns about taste. Routine checks for corrosion are advisable, as very soft water can sometimes be aggressive toward metal pipes. The supply's pH averages 7.06, which is neutral, and it meets federal standards for lead and copper.