Norfolk County, Massachusetts: drinking water report. Norfolk County serves about 710,000 residents in suburban communities south of Boston, including…
Norfolk County serves about 710,000 residents in suburban communities south of Boston, including Quincy, Brookline, and Weymouth. Water sources are mixed – some communities receive MWRA water from the Quabbin and Wachusett Reservoir system, while others operate independent surface water or groundwater systems. The split creates significant quality differences between neighboring towns.
MWRA communities benefit from one of the cleanest municipal water supplies in the country. Independent systems face more variable quality. Massachusetts regulates PFAS as a sum of six compounds with an MCL of 20 ppt – one of the stricter approaches nationally.
According to the Massachusetts DEP's 2024 monitoring data, four public water systems in Norfolk County reported PFAS above the state MCL, all operating independent groundwater systems. These exceedances triggered mandatory treatment installation. UCMR5 data confirms the pattern – MWRA-served communities show minimal PFAS detections, while independent groundwater systems show higher levels.
Determine whether your town receives MWRA water or operates independently. The answer shapes your entire risk profile.
Check your water to identify your provider and see data. For independent groundwater systems with PFAS detections, a reverse osmosis filter adds household protection. Our water filter guide covers which systems work. Pull your detailed report, and visit our Massachusetts page for statewide patterns.