Texas PFAS results from EPA's final data
Report published Nov 14, 2026 · EPA UCMR 5 final data file of Oct 15, 2026 (samples collected 2023–2025) · Method · National results →
28 Texas water systems serving 2.8 million people had PFAS above a 2024 federal limit in EPA's final round of nationwide PFAS testing: 2% of the 1130 Texas systems tested, compared with 11% nationally.
Highest PFOA or PFOS averages in Texas
- City of Abilene Abilene · PFOS25.3 ppt
- City of Grand Prairie Grand Prairie · PFOS22.6 ppt
- Hawley Water Supply Corporation Hawley · PFOS20.9 ppt
- Potosi Water Supply Corporation Abilene · PFOS18.1 ppt
- Dyess Air Force Base Water System Abilene · PFOS17.9 ppt
- City of Boerne Boerne · PFOS16.7 ppt
- Town of Anthony Anthony · PFOS16.5 ppt
- City of Pflugerville Pflugerville · PFOS14 ppt
- Manville Water Supply Corporation Round Rock · PFOS11 ppt
- City of Tye Tye · PFOS8.13 ppt
- Windermere Community Water System Round Rock · PFOS7.35 ppt
- City of Terrell Terrell · PFOS7.22 ppt
- City of Huntsville Huntsville · PFOS7.1 ppt
- Brownsville Public Utilities Board Brownsville · PFOS6.55 ppt
- El Paso Water Utilities El Paso · PFOS6.4 ppt
Chart data as a table
| System | ppt |
|---|---|
| City of Abilene · Abilene · PFOS | 25.3 |
| City of Grand Prairie · Grand Prairie · PFOS | 22.6 |
| Hawley Water Supply Corporation · Hawley · PFOS | 20.9 |
| Potosi Water Supply Corporation · Abilene · PFOS | 18.1 |
| Dyess Air Force Base Water System · Abilene · PFOS | 17.9 |
| City of Boerne · Boerne · PFOS | 16.7 |
| Town of Anthony · Anthony · PFOS | 16.5 |
| City of Pflugerville · Pflugerville · PFOS | 14 |
| Manville Water Supply Corporation · Round Rock · PFOS | 11 |
| City of Tye · Tye · PFOS | 8.13 |
| Windermere Community Water System · Round Rock · PFOS | 7.35 |
| City of Terrell · Terrell · PFOS | 7.22 |
| City of Huntsville · Huntsville · PFOS | 7.1 |
| Brownsville Public Utilities Board · Brownsville · PFOS | 6.55 |
| El Paso Water Utilities · El Paso · PFOS | 6.4 |
Largest systems above a limit
| # | System | People served |
|---|---|---|
| 1 | City of Fort Worth Fort Worth Above: PFOA, PFOS, PFHxS, Hazard Index | 955,900 |
| 2 | El Paso Water Utilities El Paso Above: PFOS | 747,168 |
| 3 | City of Grand Prairie Grand Prairie Above: PFOS | 201,843 |
| 4 | Brownsville Public Utilities Board Brownsville Above: PFOS | 201,249 |
| 5 | City of Abilene Abilene Above: PFOA, PFOS, PFHxS, Hazard Index | 130,501 |
| 6 | Clear Lake City Water Authority Houston Above: PFOS | 89,702 |
| 7 | City of Baytown Baytown Above: PFOS | 86,004 |
| 8 | City of Pflugerville Pflugerville Above: PFOA, PFOS, PFNA, Hazard Index | 63,464 |
| 9 | City of Huntsville Huntsville Above: PFOS | 48,522 |
| 10 | City of Haltom City Haltom City Above: PFOS, PFHxS, Hazard Index | 47,014 |
All 28 Texas systems above a limit
Every Texas community water system whose UCMR 5 results averaged above a 2024 federal PFAS limit, largest first. Systems that were not tested are not listed: not tested is not the same as not detected.
Full list: 28 systems, largest first
| System | People served |
|---|---|
| City of Fort Worth Fort Worth Above: PFOA, PFOS, PFHxS, Hazard Index | 955,900 |
| El Paso Water Utilities El Paso Above: PFOS | 747,168 |
| City of Grand Prairie Grand Prairie Above: PFOS | 201,843 |
| Brownsville Public Utilities Board Brownsville Above: PFOS | 201,249 |
| City of Abilene Abilene Above: PFOA, PFOS, PFHxS, Hazard Index | 130,501 |
| Clear Lake City Water Authority Houston Above: PFOS | 89,702 |
| City of Baytown Baytown Above: PFOS | 86,004 |
| City of Pflugerville Pflugerville Above: PFOA, PFOS, PFNA, Hazard Index | 63,464 |
| City of Huntsville Huntsville Above: PFOS | 48,522 |
| City of Haltom City Haltom City Above: PFOS, PFHxS, Hazard Index | 47,014 |
| Manville Water Supply Corporation Round Rock Above: PFOS, PFNA, Hazard Index | 39,648 |
| City of Greenville Greenville Above: PFOS | 33,354 |
| Sjwtx Triple Peak Plant Canyon Lake Above: PFOS | 32,973 |
| Cash Special Utility District Greenville Above: PFOS | 25,875 |
| City of Boerne Boerne Above: PFOS, PFHxS, Hazard Index | 24,769 |
| Windermere Community Water System Round Rock Above: PFOS | 21,231 |
| City of Terrell Terrell Above: PFOS | 18,432 |
| City of Livingston Livingston Above: PFOS | 15,199 |
| City of Webster Webster Above: PFOS | 13,710 |
| Hawley Water Supply Corporation Hawley Above: PFOA, PFOS, PFHxS, Hazard Index | 8,436 |
| Potosi Water Supply Corporation Abilene Above: PFOA, PFOS, PFHxS, Hazard Index | 7,413 |
| Dyess Air Force Base Water System Abilene Above: PFOA, PFOS, PFHxS, Hazard Index | 7,183 |
| Town of Anthony Anthony Above: PFOA, PFOS | 5,555 |
| Tanglewood on Texoma Water System Austin Above: PFHxS, Hazard Index | 4,341 |
| Eula Water Supply Corporation Clyde Above: PFOS | 3,918 |
| City of Clyde Clyde Above: PFOS | 3,820 |
| City of Dublin Dublin Above: PFOS | 3,388 |
| City of Tye Tye Above: PFOS | 1,176 |
The same list, with PFOA and PFOS averages, is in the data download.
Which limits were exceeded
| PFAS | Federal limit | Systems above it |
|---|---|---|
| PFOA 1.2 million people | 4 ppt | 7 |
| PFOS 2.8 million people | 4 ppt | 27 |
| PFHxS 1.2 million people | 10 ppt | 8 |
| PFNA 103,112 people | 10 ppt | 2 |
| GenX (HFPO-DA) | 10 ppt | 0 |
| Hazard Index 1.3 million people | 1 | 10 |
"–" in the table above means not detected. A system can be above more than one limit. EPA proposed in May 2026 to rescind the PFHxS, PFNA, GenX and Hazard Index limits. That proposal is not final.
Data and how to cite it
- Download every Texas water system as CSV (PFOA and PFOS averages, systems above a limit, lead, violations).
- EPA's source file: UCMR 5 occurrence data.
Suggested citation:
Tap Water Results, "Texas PFAS results from EPA's final UCMR 5 data" (published Nov 14, 2026, EPA data file of Oct 15, 2026). https://tapwaterresults.com/pfas/texas/
You're welcome to quote and republish these figures with a link back. Questions from reporters: see contact.
Method
For each system we average each entry point's UCMR 5 results (non-detects count as zero, complete sets of samples only) and compare the highest entry-point average with the 2024 federal limit, using EPA's rounding. This is how EPA compares UCMR 5 results to the limits in its own data summary, and our national counts match EPA's published table within 2% (how we check). Results are monitoring data from 2023–2025, not compliance determinations, and treatment installed since then is not reflected. Full method.
Questions
How many Texas water systems have PFAS above the limit?
28 of the 1130 Texas community water systems EPA tested in 2023–2025 (2%) had at least one entry-point average above a 2024 federal PFAS limit. They serve 2.8 million people. Nationally the share is 11%.
Are these systems violating the law?
Not yet. Systems have until 2029 to meet the 2024 limits, and EPA has proposed moving the PFOA and PFOS deadline to 2031 and rescinding the other limits. EPA's UCMR 5 results are monitoring data and do not determine compliance.
Which systems were tested?
EPA's UCMR 5 tested every community water system serving more than 3,300 people and a representative sample of smaller ones. Systems that were not tested have no federal result, which is not the same as having no PFAS.
All Texas water systems → · National results → · PFAS results for every state →
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.