ZIP Code 77539
Moderate10
PFAS Detected
0
Above EPA Limits
2
Water Systems
N/A
Highest % of MCL
GALVESTON COUNTY WCID 1
TX0840001 ModerateWater Type
Surface Water
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 17400.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 157.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 12.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 5.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.80ppt | No federal limit | — | Unregulated |
SAN LEON MUD
TX0840063 ModerateWater Type
Surface Water
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 17500.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 74.90ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 30.80ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.40ppt | No federal limit | — | Unregulated |
Note: ZIP code 77539 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.