ZIP Code 18914
High RiskPFAS above EPA limits detected
10 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.
43
PFAS Detected
10
Above EPA Limits
6
Water Systems
845%
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
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 106% of limit
Detected: 10.60 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 |
NWWA WARRINGTON TOWNSHIP
PA1090070 Low LevelWater Type
Surface Water
PFAS Detected
2
Above MCL
0
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 20600.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.00ppt | No federal limit | — | Unregulated |
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 |
HORSHAM WATER&SEWER AUTHORITY
PA1460033 High RiskWater Type
Surface Water
PFAS Detected
9
Above MCL
3
State
Pennsylvania
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 33.80ppt | 845% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 17.50ppt | 438% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 10.60ppt | 106% of limit
| 10 ppt | ⚠ Exceeds MCL |
lithium | 13900.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 65.30ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 41.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 7.10ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 5.70ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 4.40 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 |
NORTH WALES WATER AUTHORITY
PA1460048 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 | 13.00ppt | 325% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 11.10ppt | 278% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 5.60ppt | 56% of limit
| 10 ppt | Below limit |
PFHxS Perfluorohexane sulfonic acid | 3.70ppt | 37% of limit
| 10 ppt | Below limit |
lithium | 9650.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 9.30ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 8.10ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 6.80ppt | No federal limit | — | Unregulated |
Show 2 more compounds detected at low levels
| PFBSPerfluorobutane sulfonic acid | 6.40 ppt | No federal limit |
| PFHpAPerfluoroheptanoic acid | 5.80 ppt | No federal limit |
Note: ZIP code 18914 is served by 6 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.