ZIP Code 54474
High RiskPFAS above EPA limits detected
3 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.
14
PFAS Detected
3
Above EPA Limits
2
Water Systems
325%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 118% of limit
Detected: 4.70 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 325% of limit
Detected: 13.00 ppt
SCHOFIELD WATERWORKS
WI7370162 High RiskWater Type
Groundwater
PFAS Detected
6
Above MCL
1
State
Wisconsin
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 4.70ppt | 118% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 6.20ppt | 62% of limit
| 10 ppt | Below limit |
PFBS Perfluorobutane sulfonic acid | 11.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 9.80ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 7.80ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.30ppt | No federal limit | — | Unregulated |
WESTON MUNICIPAL UTILITIES
WI7370163 High RiskWater Type
Groundwater
PFAS Detected
8
Above MCL
2
State
Wisconsin
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 13.00ppt | 325% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 5.90ppt | 148% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 5.80ppt | 58% of limit
| 10 ppt | Below limit |
PFBS Perfluorobutane sulfonic acid | 22.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.40ppt | No federal limit | — | Unregulated |
6:2 FTS 6:2 Fluorotelomer sulfonic acid | 5.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 4.50ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 3.60ppt | No federal limit | — | Unregulated |
Note: ZIP code 54474 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.