ZIP Code 17520
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.
13
PFAS Detected
3
Above EPA Limits
2
Water Systems
595%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 595% of limit
Detected: 23.80 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 380% of limit
Detected: 15.20 ppt
CITY OF LANCASTER, PA
PA7360058 High RiskWater Type
Surface Water
PFAS Detected
6
Above MCL
1
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 23.80ppt | 595% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxA Perfluorohexanoic acid | 28.80ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 22.30ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 15.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.80ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 8.10ppt | No federal limit | — | Unregulated |
EAST PETERSBURG BOROUGH
PA7360135 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
2
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 15.20ppt | 380% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 6.30ppt | 158% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.40ppt | 34% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 6.90ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 6.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 6.30ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.30ppt | No federal limit | — | Unregulated |
Note: ZIP code 17520 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.