Millbury Water Hardness & Quality Report (2026)

Aquarion Water Company supplies Millbury, Massachusetts, drawing its drinking water exclusively from local groundwater wells. Key sources include the Millbury Avenue well, which benefits from filtration at the Millbury Avenue Water Treatment Facility, and the Oak Pond Well. These wells tap into aquifers within the Millbury area, part of the Blackstone River Basin watershed. Unlike many communities, Millbury does not rely on surface water from reservoirs or rivers for its water supply, ensuring a consistent groundwater-based provision for its residents.

Geologically, the Millbury water supply is rooted in the Central Uplands physiographic province. The region's aquifers are primarily composed of Pleistocene glacial drift—layers of sand, gravel, and till—lying atop older, fractured bedrock. This bedrock includes Paleozoic-era metamorphic and sedimentary rocks such as phyllite and quartzite, characteristic of the Worcester Coal Field. Crucially, the absence of significant limestone or dolomite formations means the groundwater doesn't dissolve many hardness minerals. This geological makeup, combined with rapid water movement through the glacial deposits, naturally results in a soft water profile.

Homeowners in Millbury will notice the practical benefits of this soft water daily. Scale buildup on appliances like water heaters, dishwashers, and washing machines is significantly reduced, potentially extending their lifespan and improving efficiency. You'll find that soap lathers more easily, and you'll experience less spotting on faucets and showerheads. Routine maintenance is simplified, with minimal need for descaling efforts. Because the water is naturally soft, installing a water softener is generally unnecessary and could even strip beneficial minerals. Aquarion Water Company confirms compliance with EPA health standards, though voluntary testing did detect PFAS at the Oak Pond Well in 2019.