CITY OF AUSTIN WATER & WASTEWATER
High Risk1 PFAS compound(s) exceed EPA Maximum Contaminant Levels
This utility has until 2029 to install treatment under the EPA's April 2024 PFAS rule. In the meantime, a point-of-use filter certified NSF/ANSI 58 for PFOA/PFOS provides reliable interim protection.
6
PFAS Detected
1
Above EPA Limits
48
ZIPs Served
Surface
Water Source
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 |
ZIP Codes Served by This Utility
78610 78613 78617 78652 78653 78660 78681 78701 78702 78703 78704 78705 78712 78717 78719 78721 78722 78723 78724 78725 78726 78727 78728 78729 78730 78731 78732 78735 78736 78737 78739 78741 78742 78744 78745 78746 78747 78748 78749 78750 78751 78752 78753 78754 78756 78757 78758 78759
Click any ZIP to see the full result page for that area.
About this data
Source
EPA UCMR 5 — January 2026 release
Sampling period
January 2023 – December 2025
Water system ID (PWSID)
TX2270001
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor