ZIP Code 76548
High RiskPFAS above EPA limits detected
2 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.
10
PFAS Detected
2
Above EPA Limits
2
Water Systems
343%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 343% of limit
Detected: 13.70 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 164% of limit
Detected: 16.40 ppt
CITY OF HARKER HEIGHTS
TX0140023 Low LevelWater Type
Surface Water
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 4.80ppt | 48% of limit
| 10 ppt | Below limit |
PFBA Perfluorobutanoic acid | 8.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.40ppt | No federal limit | — | Unregulated |
439 WSC
TX0140076 High RiskWater Type
Surface Water
PFAS Detected
7
Above MCL
2
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 13.70ppt | 343% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 16.40ppt | 164% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFHxA Perfluorohexanoic acid | 11.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 10.70ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 10.00ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 5.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.70ppt | No federal limit | — | Unregulated |
Note: ZIP code 76548 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.