City of Milford (balance) Water Hardness & Quality Report (2026)

The City of Milford (balance), Connecticut, receives drinking water from the South Central Connecticut Regional Water Authority (SCCWRWA), a regional utility serving New Haven County and surrounding areas. Primary sources include surface water from reservoirs such as Lake Gaillard and the West River watershed, with additional supply from groundwater wells. Treatment occurs at the Lake Gaillard Treatment Plant and other facilities, employing filtration, disinfection, and corrosion control to meet state and federal standards. The service area covers the balance population of Milford, excluding separately served enclaves.

Milford's water originates in the Mill River and West River watersheds within the broader Long Island Sound basin. Local geology features Triassic New Haven Arkose and Meriden Group volcanics, which weather to release alkaline earth metals, imparting a hard character. Where groundwater is used, it interacts with fractured metamorphic bedrock of the Central Metasedimentary Belt and glacial aquifers, enhancing mineral content. Glacial till and outwash deposits with limestone erratics from northern New England overlay bedrock, contributing variable mineralization that naturally enriches the supply.

At moderately hard levels, scale buildup occurs gradually in water heaters, dishwashers, washing machines, and boilers over time, reducing efficiency. Bathroom fixtures develop soap scum and coffee makers show spotting. Annual descaling of appliances, vinegar soaks for faucets, and mesh screens in aerators are recommended; a whole-house softener is advised for households with high-use appliances. Water quality adheres to EPA standards with typical pH 7.2–8.0 and full lead/copper rule compliance. Disinfection byproducts such as TTHMs are tracked quarterly against the 80 ppb MCL. Treatment includes coagulation, sedimentation, dual-media filtration, chlorination, and fluoride addition.