ZIP Code 17540
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.
16
PFAS Detected
3
Above EPA Limits
3
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 238% of limit
Detected: 9.50 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 |
UPPER LEACOCK TOWNSHIP
PA7360140 High RiskWater Type
Surface Water
PFAS Detected
9
Above MCL
2
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 9.50ppt | 238% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 8.10ppt | 203% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.70ppt | 37% of limit
| 10 ppt | Below limit |
lithium | 10200.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 12.40ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 9.30ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 9.10ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 6.50ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFBSPerfluorobutane sulfonic acid | 4.60 ppt | No federal limit |
WEST EARL WATER AUTHORITY
PA7360143 Low LevelWater Type
Surface Water
PFAS Detected
1
Above MCL
0
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFPeA Perfluoropentanoic acid | 3.30ppt | No federal limit | — | Unregulated |
Note: ZIP code 17540 is served by 3 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.