Kingsessing Water Hardness & Quality Report (2026)

Kingsessing, Pennsylvania, in Philadelphia County — a Southwest Philadelphia neighborhood adjacent to Eastwick and the Cobbs Creek corridor, one of the city's westernmost residential communities bordering Delaware County — receives its municipal water from the Philadelphia Water Department (PWD), drawing from the Schuylkill River at the Belmont Water Treatment Plant serving Southwest Philadelphia.

The moderately soft 96 mg/L hardness and TDS of 153.4 mg/L are strikingly softer than most other Philadelphia neighborhoods (Hartranft: 207.5 mg/L, Haddington: 204 mg/L, Fox Chase: 183.5 mg/L) — suggesting a significantly different distribution zone chemistry or source blend ratio in Southwest Philadelphia. The Belmont WTP serves the southwestern distribution zones, and the local mixing within the Kingsessing pressure district may have a higher proportion of softer Schuylkill source water with less lime-corrosion-control hardness addition, or a unique pressure zone fed by a different treated water blend.

At 96 mg/L, Kingsessing's water is moderately soft — comfortable for household use. Scale forms slowly, soap lathers well, and appliances operate efficiently. Semi-annual descaling is adequate. The PFAS level of 4.8 ppt warrants a certified drinking water filter — the Philadelphia Naval Shipyard (the South Philadelphia Delaware River industrial complex — AFFF legacy), the Southwest Philadelphia industrial corridor, and the Schuylkill-Delaware Valley PFAS complex contribute to Kingsessing's readings.