Seaside Water Hardness & Quality Report (2026)

Seaside, New York, in Queens County — a Queens County neighborhood adjacent to Far Rockaway and Arverne on the south shore of Queens in New York City — receives its water from NYC DEP, drawing from the Catskill and Delaware reservoir system (Queens County) through the New York City distribution.

The moderately soft 98 mg/L hardness and TDS of 182.2 mg/L are consistent with the NYC DEP Catskill-Delaware supply reaching the south Queens shore (compare Fallsburg NY: 98 mg/L at the source; Arrochar NY: 134 mg/L at the Staten Island distribution end). Seaside's Queens position receives moderate NYC DEP supply slightly harder than Manhattan/Brooklyn (typically ~60-80 mg/L) from distribution residence time and local contact. The Catskill-Delaware system at Queens County — Devonian Catskill Formation (insoluble — primary dilutant from upper watershed), Cambrian Wappinger Limestone (calcareous — hardness contributor), and Quaternary NYC distribution pipe contact (calcareous — minor TDS).

At 98 mg/L, Seaside's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and no softening is needed. Annual descaling is appropriate. The PFAS level of 4.8 ppt warrants a certified drinking water filter — the Queens County south shore industrial and former Floyd Bennett Field corridor contribute to Seaside's readings.