Hanover Water Hardness & Quality Report (2026)

The Hanover Water Division, part of the Town of Hanover Department of Public Works, serves approximately 15,000 residents across Plymouth County, Massachusetts (ZIP 02339). Water is sourced from local groundwater wells and treated at the town's municipal water treatment plants. While specific well names are not detailed in available reports, the supply is managed through municipal facilities ensuring compliance with state and federal standards, serving residential, commercial, and industrial users in this suburban community south of Boston. Wellhead protection districts within the South Coastal Basin watershed safeguard local recharge areas.

Hanover's watershed lies within the South Coastal Basin, where glacial outwash sands and gravels overlie fractured metamorphic bedrock of the Blue Hills complex, with minor granitic intrusions from the Devonian period. The region overlies Cretaceous and Tertiary sediments interspersed with granitic bedrock from the Cape Cod Bay area, including the Buzzards Bay Moraine formations. These low-carbonate glacial aquifers produce naturally soft water, as the geology lacks significant limestone or evaporite layers that would otherwise elevate dissolved mineral content, characteristic of soft water in New England.

Soft water minimizes scale buildup in pipes, water heaters, dishwashers, and appliances, reducing maintenance needs for hot water systems. Soap lathers easily without excess detergent and fixtures remain cleaner longer. No water softener is typically recommended, as the naturally low mineral profile avoids hard water issues like spotting or reduced efficiency in laundry equipment. Finished water meets iron (<0.3 mg/L) and manganese (<0.05 mg/L) aesthetic standards with color under 15 units; however, independent testing detected 6 contaminants above EPA health guidelines, including PFAS compounds (PFOA, PFOS), brominated disinfection byproducts (bromoform, bromodichloromethane), and gross alpha activity. Treatment includes filtration, disinfection, and corrosion control.