ZIP Code 02675
High RiskPFAS above EPA limits detected
2 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.
11
PFAS Detected
2
Above EPA Limits
2
Water Systems
178%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 178% of limit
Detected: 7.10 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 110% of limit
Detected: 4.40 ppt
BARNSTABLE FIRE DISTRICT
MA4020000 High RiskWater Type
Groundwater
PFAS Detected
6
Above MCL
2
State
Massachusetts
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 7.10ppt | 178% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 4.40ppt | 110% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.60ppt | 36% of limit
| 10 ppt | Below limit |
PFBS Perfluorobutane sulfonic acid | 18.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.50ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.10ppt | No federal limit | — | Unregulated |
YARMOUTH WATER DEPARTMENT
MA4351000 ModerateWater Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Massachusetts
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.10ppt | 31% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 59.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 40.60ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 12.70ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 7.70ppt | No federal limit | — | Unregulated |
Note: ZIP code 02675 is served by 2 separate water utilities.
Results above show data for each system independently.
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.