Baychester Water Hardness & Quality Report (2026)

Baychester, New York, in Bronx County — a Bronx County neighborhood adjacent to Wakefield and Eastchester in the north Bronx — receives its municipal water from New York City DEP, drawing from the Croton Reservoir system (New Croton Aqueduct delivery — the primary north Bronx supply) and the Catskill-Delaware watersheds (Bronx County).

The hard 170.5 mg/L hardness and elevated TDS of 445.5 mg/L are dramatically harder than the Delaware/Catskill-dominant Manhattan or west Bronx supplies (North Valley Stream: 74 mg/L), reflecting the north Bronx's Croton watershed supply. The Croton watershed drains the Hudson Highlands — Cambrian Poughkeepsie-Wappinger calcareous limestone, Ordovician Trenton Group carbonate (calcareous), and Ordovician Lowville Limestone (hard calcareous), in contrast to the insoluble Catskill-Delaware Devonian sandstone. The Croton's calcareous Hudson Highlands geology produces the hard north Bronx supply.

At 170.5 mg/L, Baychester's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 8.2 ppt warrants a certified reverse osmosis drinking water filter — the Bronx County north New York City industrial corridor, the Croton watershed PFAS from Westchester County sources, and the New York City metro PFAS complex contribute to Baychester's elevated readings.