Haverstraw Water Hardness & Quality Report (2026)

Haverstraw, New York, in Rockland County — a Rockland County village adjacent to Stony Point on the Hudson River in southeast New York — receives its water from the United Water Rockland, drawing from Rockland Lake (Rockland County) through the southeast New York distribution.

The moderately hard 132.5 mg/L hardness and TDS of 293.9 mg/L reflect the southeast New York Rockland County supply's moderate character — the Precambrian Highlands Gneiss and Cambrian Poughquag Quartzite contribute insoluble dilution producing softer water than the Triassic-influenced Rockland communities, though harder than upstate New York sources (compare New City NY: 89/196 in Rockland County softer from the Ramapo supply; Haverstraw harder from the Hudson River corridor distribution). The Rockland Lake system — Precambrian Highlands Gneiss (insoluble — primary dilutant), Cambrian Poughquag Quartzite (insoluble — secondary dilutant), and Triassic Newark Basin limestone (calcareous — primary hardness contributor).

At 132.5 mg/L with TDS 294, Haverstraw's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid. Quarterly descaling is appropriate. The PFAS level of 6.4 ppt warrants a certified drinking water filter — the Rockland County southeast New York industrial corridor contribute to Haverstraw's elevated readings.