ZIP Code 53024
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.
10
PFAS Detected
3
Above EPA Limits
2
Water Systems
775%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 775% of limit
Detected: 31.00 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 730% of limit
Detected: 73.00 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 105% of limit
Detected: 4.20 ppt
GRAFTON WATERWORKS
WI2460111 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Wisconsin
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 9000.00ppt | No federal limit | — | Unregulated |
SAUKVILLE WATERWORKS
WI2460134 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
3
State
Wisconsin
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 31.00ppt | 775% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 73.00ppt | 730% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 4.20ppt | 105% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFPeS | 30.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 29.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 21.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 12.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 6.40ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 3.70 ppt | No federal limit |
Note: ZIP code 53024 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.