Cinnaminson Water Hardness & Quality Report (2026)

Cinnaminson, New Jersey, in Burlington County — a Burlington County township adjacent to Palmyra and Moorestown on the Delaware River in southwest New Jersey — receives its water from New Jersey American Water, drawing from the Delaware River (Burlington County) through the southwest New Jersey distribution.

The moderately hard 140 mg/L hardness and TDS of 327.9 mg/L reflect the southwest New Jersey Delaware River supply's moderate Triassic and Appalachian calcareous character — consistent with other southwest New Jersey Delaware-served communities (Moorestown: ~138 mg/L; Cherry Hill: ~141 mg/L). The Delaware River at Burlington County drains the New Jersey-Pennsylvania Highlands — Triassic Brunswick Formation (calcareous redbed — primary hardness contributor), Cambrian Hardyston Quartzite (slightly calcareous), and Precambrian New Jersey Highlands crystalline (insoluble). The Triassic calcareous drainage produces the moderately hard southwest New Jersey supply.

At 140 mg/L, Cinnaminson's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 10.8 ppt warrants a certified reverse osmosis drinking water filter — McGuire Air Force Base (Burlington County — AFFF, directly in the Burlington County service zone and the dominant New Jersey PFAS source) contributes significantly to Cinnaminson's elevated readings.