ZIP Code 78660
High RiskPFAS above EPA limits detected
8 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.
36
PFAS Detected
8
Above EPA Limits
5
Water Systems
360%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 120% of limit
Detected: 4.80 ppt
PFNA Exceeds EPA limit
0 ppt MCL: 10 ppt 252% of limit
Detected: 25.20 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 158% of limit
Detected: 6.30 ppt
CITY OF AUSTIN WATER & WASTEWATER
TX2270001 High RiskWater Type
Surface Water
PFAS Detected
6
Above MCL
1
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 4.80ppt | 120% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 6.20ppt | 62% of limit
| 10 ppt | Below limit |
PFBA Perfluorobutanoic acid | 8.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 5.10ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 4.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 3.30ppt | No federal limit | — | Unregulated |
CITY OF PFLUGERVILLE
TX2270014 High RiskWater Type
Surface Water
PFAS Detected
11
Above MCL
3
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 14.40ppt | 360% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 25.20ppt | 252% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 6.30ppt | 158% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 7.20ppt | 72% of limit
| 10 ppt | Below limit |
lithium | 13900.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 13.30ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 9.30ppt | No federal limit | — | Unregulated |
Show 3 more compounds detected at low levels
| PFBAPerfluorobutanoic acid | 8.10 ppt | No federal limit |
| PFHpAPerfluoroheptanoic acid | 4.90 ppt | No federal limit |
| PFUnAPerfluoroundecanoic acid | 2.70 ppt | No federal limit |
MANVILLE WSC
TX2270033 High RiskWater Type
Groundwater
PFAS Detected
11
Above MCL
3
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 12.40ppt | 310% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 24.30ppt | 243% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 5.90ppt | 148% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 7.00ppt | 70% of limit
| 10 ppt | Below limit |
lithium | 83800.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 10.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 9.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 8.70ppt | No federal limit | — | Unregulated |
Show 3 more compounds detected at low levels
| PFBAPerfluorobutanoic acid | 7.40 ppt | No federal limit |
| PFHpAPerfluoroheptanoic acid | 4.30 ppt | No federal limit |
| PFUnAPerfluoroundecanoic acid | 2.70 ppt | No federal limit |
WINDERMERE COMMUNITY
TX2270161 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
1
State
Texas
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 7.50ppt | 188% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 6.50ppt | 65% of limit
| 10 ppt | Below limit |
lithium | 33700.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.90ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 3.90ppt | No federal limit | — | Unregulated |
NORTHTOWN MUD
TX2270264 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 | 5.90ppt | No federal limit | — | Unregulated |
Note: ZIP code 78660 is served by 5 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.