ZIP Code 19348
High RiskPFAS above EPA limits detected
7 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.
26
PFAS Detected
7
Above EPA Limits
4
Water Systems
443%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 443% of limit
Detected: 17.70 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 360% of limit
Detected: 14.40 ppt
PFNA Exceeds EPA limit
0 ppt MCL: 10 ppt 120% of limit
Detected: 12.00 ppt
KENNETT SQUARE MUN WATER WORKS
PA1150108 High RiskWater Type
Surface Water
PFAS Detected
8
Above MCL
2
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 17.70ppt | 443% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 14.40ppt | 360% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 4.20ppt | 42% of limit
| 10 ppt | Below limit |
PFBA Perfluorobutanoic acid | 18.90ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 12.60ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 11.40ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 7.80ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.50ppt | No federal limit | — | Unregulated |
CHESTER WATER AUTHORITY
PA1230004 High RiskWater Type
Surface Water
PFAS Detected
4
Above MCL
1
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 5.10ppt | 128% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFBS Perfluorobutane sulfonic acid | 4.50ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 4.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 3.90ppt | No federal limit | — | Unregulated |
NORTH PENN WATER AUTHORITY
PA1460034 High RiskWater Type
Groundwater
PFAS Detected
4
Above MCL
1
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 5.10ppt | 128% of limit
| 4 ppt | ⚠ Exceeds MCL |
lithium | 23600.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.40ppt | No federal limit | — | Unregulated |
AQUA PA MAIN SYSTEM
PA1460073 High RiskWater Type
Surface Water
PFAS Detected
10
Above MCL
3
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 12.60ppt | 315% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 9.20ppt | 230% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 12.00ppt | 120% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 7.70ppt | 77% of limit
| 10 ppt | Below limit |
lithium | 15700.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 21.80ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 17.20ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 10.10ppt | No federal limit | — | Unregulated |
Show 2 more compounds detected at low levels
| PFBSPerfluorobutane sulfonic acid | 9.50 ppt | No federal limit |
| PFHpAPerfluoroheptanoic acid | 6.90 ppt | No federal limit |
Note: ZIP code 19348 is served by 4 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.