Piscataway Water Hardness & Quality Report (2026)

Piscataway Township, New Jersey, in Middlesex County on the Raritan River across from New Brunswick — home of Rutgers University's main campus (Busch–Livingston and College Avenue campuses), the Rutgers Athletic Campus, and significant pharmaceutical and chemical research (BASF, Johnson & Johnson research facilities) — draws its municipal water supply from the Raritan River via the New Jersey American Water Raritan District. Water hardness in Piscataway measures 156 mg/L — classified as hard, notably harder than neighboring New Brunswick (98 mg/L).

Piscataway's hard supply — harder than New Brunswick (98 mg/L) on the same Raritan River source — reflects the Piscataway distribution infrastructure in the central Middlesex County Rutgers corridor. The Piscataway Township distribution system serves both the original Piscataway residential areas (dating from the late 19th–early 20th century manufacturing expansion) and the extensive Rutgers University campus infrastructure. The Rutgers University campus water distribution — including extensive laboratory, dormitory, and athletic facility connections — includes infrastructure of the 1920s–1960s Rutgers expansion era with cast-iron campus mains of substantial vintage. The combined Piscataway municipal and Rutgers campus distribution infrastructure produces the hard 156 mg/L, elevated above the Raritan River source hardness.

At 156 mg/L, Piscataway residents face regular hard water challenges. Scale deposits form on faucet aerators, showerheads, and appliances within weeks — monthly descaling with citric acid solution is standard maintenance. New Jersey American Water consistently delivers water meeting all New Jersey DEP and EPA Safe Drinking Water Act requirements.