ZIP Code 18901
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.
32
PFAS Detected
7
Above EPA Limits
4
Water Systems
475%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 475% of limit
Detected: 19.00 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 220% of limit
Detected: 8.80 ppt
AQUA PA CHALFONT
PA1090005 High RiskWater Type
Groundwater
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 | 19.00ppt | 475% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 8.80ppt | 220% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.10ppt | 31% of limit
| 10 ppt | Below limit |
lithium | 9670.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 18.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 18.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 9.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 5.50ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 3.10 ppt | No federal limit |
DOYLESTOWN BORO WATER DEPT
PA1090081 High RiskWater Type
Groundwater
PFAS Detected
10
Above MCL
2
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 14.60ppt | 365% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 11.30ppt | 283% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 6.40ppt | 64% of limit
| 10 ppt | Below limit |
PFNA Perfluorononanoic acid | 5.20ppt | 52% of limit
| 10 ppt | Below limit |
PFHxA Perfluorohexanoic acid | 8.60ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 8.50ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 7.50ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.70ppt | No federal limit | — | Unregulated |
Show 2 more compounds detected at low levels
| PFHpAPerfluoroheptanoic acid | 5.20 ppt | No federal limit |
| PFUnAPerfluoroundecanoic acid | 3.00 ppt | No federal limit |
DTMA MAIN SYSTEM
PA1090128 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
2
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 14.20ppt | 355% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 13.40ppt | 335% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 7.40ppt | 74% of limit
| 10 ppt | Below limit |
lithium | 15100.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 10.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.80ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 8.40ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 7.20ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFBAPerfluorobutanoic acid | 6.30 ppt | No federal limit |
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 |
Note: ZIP code 18901 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.