Stratford Water Hardness & Quality Report (2026)

Stratford, Connecticut, in Fairfield County on Long Island Sound at the Housatonic River mouth — a major Fairfield County coastal community known for the American Shakespeare Theater (one of the largest Shakespearean festivals in North America), the short-Stratford Point Light, and a diverse working-class community with significant Puerto Rican-American and Caribbean-American populations — draws its municipal water supply from the Housatonic River watershed via the Aquarion Water Company of Connecticut Bridgeport–Stratford District. Water hardness in Stratford measures 57 mg/L — classified as moderately soft.

Stratford's moderate softness reflects the Connecticut coastal watershed's calcareous-poor geology. The Housatonic River at Stratford drains: the Connecticut Triassic–Jurassic Hartford Basin (calcareous-poor Portland Arkose red bed sandstone and Jurassic basalt trap rock of the Connecticut coastal zone); the New England Crystalline Massif (Milford Granite Gneiss and Derby Phyllite — Proterozoic–Cambrian crystalline terrain of the coastal Fairfield County); and the Long Island Sound Quaternary coastal plain outwash (quartz sand). The calcium-poor Triassic sandstone and coastal crystalline terrain produce the moderate 57 mg/L at Stratford — characteristic of the Connecticut coastal softness.

With hardness at 57 mg/L, Stratford residents enjoy moderately soft water with minimal scale challenges. Aquarion Water Company consistently delivers water meeting all Connecticut DEEP and EPA Safe Drinking Water Act requirements.