ZIP Code 77459
Moderate19
PFAS Detected
0
Above EPA Limits
9
Water Systems
N/A
Highest % of MCL
QUAIL VALLEY UTILITY DISTRICT
TX0790028 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 15700.00ppt | No federal limit | — | Unregulated |
THUNDERBIRD UTILITY DISTRICT 1
TX0790033 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 21000.00ppt | No federal limit | — | Unregulated |
FORT BEND COUNTY MUD 26 QUAIL GREEN WEST
TX0790137 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 17000.00ppt | No federal limit | — | Unregulated |
FIRST COLONY MUD 9
TX0790230 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 17600.00ppt | No federal limit | — | Unregulated |
FORT BEND COUNTY MUD 42 WAT PLAT
TX0790254 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 15000.00ppt | No federal limit | — | Unregulated |
FORT BEND COUNTY MUD 48
TX0790267 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 20900.00ppt | No federal limit | — | Unregulated |
SIENNA PLANTATION MUD 2
TX0790345 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 | 16400.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 38.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 17.90ppt | No federal limit | — | Unregulated |
SIENNA PLANTATION MUD 3
TX0790376 ModerateWater Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 25000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 130.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 23.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.70ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.20ppt | No federal limit | — | Unregulated |
SIENNA PLANTATION MUD 10
TX0790452 ModerateWater Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 19200.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 194.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 9.60ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 5.70ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.70ppt | No federal limit | — | Unregulated |
Note: ZIP code 77459 is served by 9 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.