Salem Water Hardness & Quality Report (2026)

The Salem Water Department, in partnership with the Salem and Beverly Water Supply Board (SBWSB), provides drinking water to approximately 44,480 residents in Salem, Massachusetts, Essex County. Primary sources are surface water from Wenham Lake and Longham Reservoir, treated via conventional filtration and hypochlorite disinfection at facilities in Beverly before being distributed throughout the service area. The utility operates from 98 Washington St, 2nd Floor, Salem, MA 01970 and is contactable at 978-619-5673.

The supply originates in the Ipswich River watershed, characterized by glacial deposits and underlying volcanic bedrock formations including the Lynn Volcanics and Mattapan Volcanic Complex from the late Proterozoic era. These geological features impart a moderately mineralised character through natural leaching of minerals, distinguishing the supply from the softer waters found in more granitic New England terrains. No specific aquifer is involved, as this is a surface water system influenced by local till and outwash deposits.

At moderately hard levels, scale buildup occurs noticeably in dishwashers, washing machines, and water heaters, reducing efficiency and lifespan. Kettles and faucets may develop visible deposits, and laundry feels less soft without treatment. Regular vinegar descaling is helpful, and for households with hard water concerns a whole-home water softener is often recommended to prevent appliance strain. Water quality meets all EPA standards with alkalinity ranging 25–35 mg/L as CaCO3; lead and copper at 90th percentile levels comply, with nine of ten homes below action thresholds, and no PFAS or notable contaminants above guidelines were reported.