ZIP Code 02071
Moderate6
PFAS Detected
0
Above EPA Limits
1
Water System
100%
Highest % of MCL
WALPOLE WATER DEPT
MA4307000 ModerateWater Type
Groundwater
PFAS Detected
6
Above MCL
0
State
Massachusetts
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 4.00ppt | 100% of limit
| 4 ppt | Below limit |
PFOA Perfluorooctanoic acid | 4.00ppt | 100% of limit
| 4 ppt | Below limit |
PFBA Perfluorobutanoic acid | 16.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 12.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 7.00ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.00ppt | No federal limit | — | Unregulated |
Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.
UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.
Detection values represent the highest single-sample result measured at entry points to the distribution system.