ZIP Code 78641
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
4
Water Systems
143%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 143% of limit
Detected: 5.70 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 123% of limit
Detected: 4.90 ppt
SANDY CREEK RANCHES SUBDIVISION
TX2270054 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 | 62000.00ppt | No federal limit | — | Unregulated |
CITY OF GEORGETOWN
TX2460001 High RiskWater Type
GU
PFAS Detected
8
Above MCL
2
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 5.70ppt | 143% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 4.90ppt | 123% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 4.70ppt | 47% of limit
| 10 ppt | Below limit |
lithium | 17400.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 33.80ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 18.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 10.10ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.60ppt | No federal limit | — | Unregulated |
CITY OF LEANDER
TX2460012 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 |
|---|---|---|---|---|
PFBA Perfluorobutanoic acid | 5.10ppt | No federal limit | — | Unregulated |
BLOCK HOUSE MUD
TX2460110 Low LevelWater Type
Surface Water
PFAS Detected
2
Above MCL
0
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 9260.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.00ppt | No federal limit | — | Unregulated |
Note: ZIP code 78641 is served by 4 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.