Ewing Water Hardness & Quality Report (2026)

Trenton Water Works (TWW) serves Ewing Township, New Jersey, drawing raw surface water from the Delaware River. The utility treats and distributes drinking water to more than 200,000 people across the Trenton metropolitan area, including portions of Ewing, Hamilton, Hopewell, and Lawrence in Mercer County. Water is treated at a central facility using standard coagulation, filtration, and disinfection processes before distribution to the service area. Trenton Water Works has faced recent monitoring compliance challenges, with reports of violations in water quality testing obligations.

The Delaware River watershed drains portions of New York, Pennsylvania, and New Jersey, flowing through terrain underlain by Paleozoic sedimentary rocks — including the Martinsburg Shale and Kittatinny Limestone formations. These carbonate-rich geological units naturally dissolve calcium and magnesium into the river water throughout the basin. Contributions from tributaries and groundwater seepage integrate across the watershed, producing a consistently moderately mineralised water chemistry that reflects the carbonate geology of the upper Delaware basin.

At 75 mg/L, Ewing's water is moderately soft and scale buildup in kettles, coffee makers, and shower heads develops only gradually. Water heaters and dishwashers can accumulate mineral deposits over time; periodic descaling is recommended. Most soaps and detergents perform adequately at this hardness level, though slightly higher doses may improve cleaning. A water softener is optional rather than essential. The utility's supply has been detected with arsenic above health guidelines, occurring naturally from soil and bedrock sources; residents should consult the latest Consumer Confidence Report for current contaminant data and any advisories.