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EPA WATER QUALITY DATA · MA

Massachusetts Tap Water Quality by City

EPA UCMR5 PFAS monitoring data, violation history, and filter recommendations for 2 cities across Massachusetts. All data sourced directly from federal EPA databases.

2
Cities tracked
2
With PFAS violations
92 ppt
Highest PFAS detected
Highest contamination in Massachusetts: Boston — detected at 92 ppt (23× the EPA limit for PFOA/PFOS)
MASSACHUSETTS CITIES — TAP WATER REPORTS
BostonMEDIUM RISK1 MCL VIOLATION
MWRA -- Boston Distribution · Pop. 675K
92
ppt PFAS
WorcesterMEDIUM RISK1 MCL VIOLATION
Worcester Department of Public Works · Pop. 200K
92
ppt PFAS
ABOUT WATER QUALITY IN MASSACHUSETTS

Massachusetts water quality varies significantly by city and water system. The EPA's UCMR5 monitoring program tested all systems serving 3,300+ people for 29 PFAS compounds between 2023 and 2025. In Massachusetts, 2 of the 2 tracked cities returned results with active MCL violations — meaning detected PFAS levels exceed the EPA's legally enforceable maximum.

Click any city above for a full breakdown of detected compounds, violation history, water hardness data, and certified filter recommendations matched to the actual contaminant profile of that system.

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