Bridgeport Water Hardness & Quality Report (2026)

Aquarion Water Company of Connecticut - Main System supplies water to approximately 373,800 people across Bridgeport and surrounding towns including Easton, Fairfield, Monroe, Newtown, Norwalk, Redding, Shelton, Stratford, Trumbull, Westport, and Weston in Fairfield County. The primary sources are eight reservoirs — Aspetuck, Easton Lake, Far Mill, Hemlocks, Means Brook, Saugatuck, Trap Falls, and West Pequonnock — providing over 95% of the average 44 million gallons per day within the Housatonic River watershed. Supplemental groundwater comes from the Westport and Coleytown well fields. Water is treated at the Bridgeport Treatment Plant using conventional filtration, disinfection, and corrosion control.

The reservoirs lie within the Housatonic River watershed in Connecticut's southwestern highlands, underlain by Precambrian and Paleozoic metamorphic rocks — gneiss and schist — with minor granitic intrusions, part of the Appalachian orogenic belt. No major carbonate aquifers are present; thin glacial deposits overlie fractured crystalline bedrock. This limestone-poor geology weathers slowly and contributes limited dissolved minerals, producing the soft supply measured at 60 mg/L. The Westport and Coleytown well fields tap glacial till and stratified drift overlying fractured crystalline bedrock aquifers, adding minor supplemental mineralization.

At 60 mg/L (soft), Bridgeport's water produces minimal scale buildup and a water softener is not typically needed. The 2023 Consumer Confidence Report confirms hardness averaging 3.5 gpg (range 2–6 gpg), with disinfection via chloramines and corrosion control via orthophosphate keeping lead and copper below action limits. Bromodichloromethane, a disinfection byproduct, exceeds health guidelines in some samples; no recent PFAS violations are noted, though monitoring continues. Treatment includes coagulation, sedimentation, filtration, and disinfection to ensure safe delivery.