ZIP Code 56379
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.
9
PFAS Detected
3
Above EPA Limits
1
Water System
342%
Highest % of MCL
Compounds Exceeding EPA Limits
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 342% of limit
Detected: 34.20 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 300% of limit
Detected: 12.00 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 203% of limit
Detected: 8.10 ppt
Sauk Rapids
MN1050004 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
3
State
Minnesota
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 34.20ppt | 342% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 12.00ppt | 300% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 8.10ppt | 203% of limit
| 4 ppt | ⚠ Exceeds MCL |
lithium | 9100.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 14.60ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 7.40ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 6.00ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 3.60 ppt | No federal limit |
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.