Somerset Water Hardness & Quality Report (2026)

Somerset, New Jersey, in Somerset County — a densely populated unincorporated Somerset County community adjacent to Franklin Township and Bound Brook in the central New Jersey Raritan River corridor — receives its municipal water from New Jersey American Water or the Somerset County Water District, which draws from the Raritan River Basin reservoir system. The Raritan Basin serves this portion of the central New Jersey Piedmont through New Jersey American Water's Central Division distribution infrastructure.

The moderately hard 124.5 mg/L hardness and TDS of 276.1 mg/L reflect the Raritan Basin watershed's moderate mineral character — the same geology that produces similar readings throughout the Somerset County-Raritan corridor (mirroring Cranford's 124.5 mg/L in Union County). The Raritan River and its Somerset County tributaries drain the Triassic Newark Basin redbed formations (Brunswick Formation shale and sandstone) of the central New Jersey Piedmont, which weather moderately to contribute dissolved calcium and magnesium to the supply. The Precambrian Reading Prong Highlands metasedimentary and granitic inputs from the north-central New Jersey uplands add lower-mineral water to the blend.

At 124.5 mg/L, Somerset's water is moderately hard — consistent with the Somerset County-Raritan supply profile. Scale builds in kettles and appliances over months, the dishwasher benefits from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling of heating appliances is appropriate. The critically elevated PFAS level of 9.9 ppt warrants a certified drinking water filter — the Bound Brook-Somerset industrial corridor's long pharmaceutical and chemical manufacturing history (the former American Cyanamid, Wyeth Pharmaceuticals, and Sanofi sites in the Raritan-Bound Brook area), the Somerville depot and manufacturing legacies, and the Raritan River basin's pervasive PFAS contamination produce a seriously elevated PFAS profile. A certified reverse osmosis drinking water filter is strongly recommended.