Pompton Lakes Water Hardness & Quality Report (2026)

Pompton Lakes, New Jersey, in Passaic County — a Passaic County borough adjacent to Riverdale and Wayne on the Pompton River in north New Jersey — receives its water from Suez Water New Jersey, drawing from Pompton Lake and the Wanaque Reservoir system through the north New Jersey distribution.

The hard 162.5 mg/L hardness and TDS of 409.5 mg/L are elevated for a Highlands region supply — the Precambrian Highlands Gneiss provides insoluble dilution, but Triassic Hammer Creek Formation and Newark Basin calcareous formations contribute significant dissolved mineral content to the Pompton watershed (compare Riverdale NJ: 159/401 in Passaic County comparable; Wayne NJ: 165/418 in Passaic County comparable; Pompton Lakes consistent hard from the same Passaic County Pompton Lake Precambrian Highlands supply). The Pompton River watershed — Precambrian Highlands Gneiss (insoluble — primary dilutant), Triassic Hammer Creek Formation (slightly calcareous — primary hardness contributor), and Quaternary Pompton River alluvium (calcareous — TDS contributor).

At 162.5 mg/L with TDS 410, Pompton Lakes' water is hard — scale builds in appliances. Quarterly descaling is appropriate. The PFAS level of 12.0 ppt is very high — a certified filter with PFAS removal is strongly recommended — the Passaic County DuPont Pompton Lakes Works Superfund site is among the most documented industrial PFAS sources in New Jersey. Pompton Lakes residents are strongly encouraged to use certified point-of-use filtration.