North Branford Water Hardness & Quality Report (2026)

North Branford, Connecticut, in New Haven County (South Central Connecticut Planning Region) — a New Haven County town adjacent to Branford and North Haven in south-central Connecticut — receives its water from the South Central Connecticut Regional Water Authority (SCCRWA), drawing from Lake Gaillard (New Haven County) through the south-central Connecticut distribution.

The moderately hard 91.5 mg/L hardness and TDS of 230.6 mg/L reflect the south-central Connecticut Lake Gaillard supply's moderate New England crystalline character — consistent with other SCCRWA New Haven County communities (North Haven: ~90 mg/L; Hamden: ~91 mg/L). The Lake Gaillard watershed at New Haven County drains the Connecticut New England Upland — Precambrian Eastern Highland Gneiss (insoluble), Precambrian Stony Creek Granite (insoluble), and Triassic Hartford Basin fringe (slightly calcareous — minor hardness contributor), plus Pleistocene calcareous glacial till (calcareous — primary hardness contributor).

At 91.5 mg/L, North Branford's water is moderately hard — light scale forms slowly in appliances, dishwashers benefit from rinse aid, and faucet aerators need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 11.2 ppt warrants a certified reverse osmosis drinking water filter — Naval Submarine Base New London (New London County — AFFF) and the Sikorsky Aircraft (Stratford, Fairfield County — PFAS industrial) corridor contribute to North Branford's elevated readings.