ZIP Code 77386
Low Level11
PFAS Detected
0
Above EPA Limits
10
Water Systems
N/A
Highest % of MCL
EL DORADO UTILITY DISTRICT
TX1010471 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 | 19900.00ppt | No federal limit | — | Unregulated |
HARRIS COUNTY WCID 110
TX1010482 Low LevelWater Type
Groundwater
PFAS Detected
2
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 28800.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 8.00ppt | No federal limit | — | Unregulated |
HARRIS COUNTY IMPROVEMENT DISTRICT 18
TX1013479 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 | 44600.00ppt | No federal limit | — | Unregulated |
CITY OF OAK RIDGE NORTH
TX1700025 Low LevelWater Type
Surface Water
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 24800.00ppt | No federal limit | — | Unregulated |
SOUTHERN MONTGOMERY COUNTY MUD
TX1700073 Low LevelWater Type
MX
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 24600.00ppt | No federal limit | — | Unregulated |
SPRING CREEK UTILITY DISTRICT
TX1700133 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 | 14600.00ppt | No federal limit | — | Unregulated |
RAYFORD ROAD MUD
TX1700334 Low LevelWater Type
MX
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 11600.00ppt | No federal limit | — | Unregulated |
MONTGOMERY COUNTY MUD 94
TX1700716 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 | 28700.00ppt | No federal limit | — | Unregulated |
MONTGOMERY COUNTY MUD 89
TX1700717 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 | 28000.00ppt | No federal limit | — | Unregulated |
MONTGOMERY COUNTY MUD 119 SPRING TRAILS
TX1700773 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 | 24800.00ppt | No federal limit | — | Unregulated |
Note: ZIP code 77386 is served by 10 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.