ZIP Code 21157
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.
8
PFAS Detected
2
Above EPA Limits
1
Water System
310%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 310% of limit
Detected: 12.40 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 173% of limit
Detected: 6.90 ppt
CITY OF WESTMINSTER, MD
MD0060015 High RiskWater Type
GU
PFAS Detected
8
Above MCL
2
State
Maryland
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 12.40ppt | 310% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 6.90ppt | 173% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 4.20ppt | 42% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 66.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 24.60ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 20.10ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 8.60ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 8.10ppt | 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.