Milford Water Hardness & Quality Report (2026)

Milford, Massachusetts, in Worcester County in the Blackstone Valley, receives its municipal water from the Milford Water Company, which draws from local surface water reservoirs impounded in the Blackstone River watershed — including Louisa Lake, Cedar Swamp Pond, and associated watershed impoundments in the Milford area. The Milford Water Company operates as a local utility serving this historic textile and manufacturing town, treating reservoir water through conventional methods before distribution through the city's municipal grid.

The very soft 48 mg/L hardness reflects the geology of the Milford Granite and surrounding Paleozoic metamorphic terrain in central Massachusetts. The watershed overlies Precambrian to Paleozoic crystalline rock — including the Milford Granite (a distinctive pink granite) and surrounding schists, gneisses, and amphibolites — siliceous igneous and metamorphic formations that contain essentially no soluble carbonate minerals. New England's ancient crystalline basement is remarkably carbonate-poor throughout, producing the characteristically soft, low-mineral water found in watershed-sourced supplies across the region.

At 48 mg/L, Milford's water is soft — comfortable for all household uses without treatment. Soap lathers abundantly, appliances remain scale-free for extended periods, and glassware from the dishwasher emerges spotless. Kettles may need descaling only once a year under normal use. The primary concern for Milford residents is the elevated PFAS of 6.4 ppt — reflecting the Blackstone Valley's long industrial manufacturing history — and residents are advised to use a certified NSF/ANSI 58 reverse osmosis or activated carbon block filter for drinking and cooking water as a precautionary measure against PFAS accumulation.