ZIP Code 77320
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.
12
PFAS Detected
2
Above EPA Limits
2
Water Systems
223%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 223% of limit
Detected: 8.90 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 150% of limit
Detected: 6.00 ppt
CITY OF HUNTSVILLE
TX2360001 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
2
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 8.90ppt | 223% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 6.00ppt | 150% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 8.30ppt | 83% of limit
| 10 ppt | Below limit |
lithium | 60200.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 19.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 17.90ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 12.90ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.50ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 6.70 ppt | No federal limit |
RIVERSIDE SUD
TX2360010 Low LevelWater Type
Groundwater
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 60300.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 6.60ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.30ppt | No federal limit | — | Unregulated |
Note: ZIP code 77320 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.