PFAS · Texas

PFAS in Texas drinking water: EPA’s final survey results

EPA’s national PFAS survey (UCMR 5) tested 1,131 of the community water systems that serve homes in Texas. 615 found at least one of 29 PFAS above the laboratory reporting level, and 27 had a PFOA or PFOS sampling-location yearly average at or above EPA’s 4.0 ppt limit. Samples were collected from January 2023 to June 2026.

In focus54%of surveyed systems found PFAS

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

1,131

Texas community systems in EPA’s survey

serving about 29,886,160 people

615

found at least one PFAS

54% of surveyed systems; about 25,261,595 people served

PFOA or PFOS yearly average at or above the MCL

compared the way EPA does: the average of a complete sampling set

787

lithium at or above EPA’s health reference level

lithium was part of the same survey

PFBA was the compound Texas community systems found most often: 548 of 1,131 tested systems measured it above the reporting level. Across the country, 35% of surveyed community systems found at least one PFAS; in Texas the share is 54%. The largest Texas system with a detection, City of Houston, serves 2,970,543 people and found 4 of the 29 compounds.

Which PFAS were found most often in Texas

Each row counts the Texas community water systems where that compound was measured above the reporting level at least once. A detection is a measurement, not a violation: most of these compounds have no federal limit.

Compound	Systems where found	Systems tested	Share
PFBA	548	1,131	48%
PFPeA	421	1,131	37%
PFHxA	369	1,131	33%
PFBS	281	1,131	25%
PFHxS	150	1,131	13%
PFOS	97	1,131	9%
6:2 FTS	53	1,131	5%
PFOA	40	1,131	4%
PFHpA	39	1,131	3%
NFDHA	4	1,131	0%
PFNA	3	1,131	0%
PFPeS	3	1,131	0%

Texas systems with the most PFAS found

The 10 surveyed community water systems that found the most different PFAS, with PFOA and PFOS compared to EPA’s 4.0 ppt limits on the yearly average at the highest sampling location. Larger systems come first when counts tie.

Water system	People served	PFAS found (of 29)	PFOA	PFOS
City of Pflugerville TX2270014	63,464	10	6.3 ppt at or above the MCL	14.0 ppt at or above the MCL
Manville WSC TX2270033	39,648	10	2.9 ppt below the MCL	11.0 ppt at or above the MCL
City of Cameron TX1660001	5,489	10	2.3 ppt below the MCL	1.1 ppt below the MCL
City of Abilene TX2210001	130,501	9	6.9 ppt at or above the MCL	25.3 ppt at or above the MCL
Hawley WSC TX1270006	8,436	9	5.3 ppt at or above the MCL	20.9 ppt at or above the MCL
City of Clyde TX0300002	3,820	9	1.4 ppt below the MCL	5.8 ppt at or above the MCL
City of Tye TX2210011	1,176	9	2.2 ppt below the MCL	8.1 ppt at or above the MCL
Dallas Water Utility TX0570004	1,356,479	8	3.8 ppt below the MCL	2.4 ppt below the MCL
City of Irving TX0570050	264,546	8	2.3 ppt below the MCL	1.0 ppt below the MCL
City of Grand Prairie TX0570048	201,843	8	1.2 ppt below the MCL	22.6 ppt at or above the MCL

Counties with the most systems that found PFAS

Harris County 130 of 256 surveyed systems
Fort Bend County 34 of 65 surveyed systems
Dallas County 26 of 26 surveyed systems
Tarrant County 24 of 27 surveyed systems
Collin County 23 of 23 surveyed systems
Denton County 21 of 27 surveyed systems
Travis County 16 of 19 surveyed systems
Kaufman County 15 of 16 surveyed systems

How to read these numbers

UCMR 5 asked every community and non-transient non-community water system serving 3,300 or more people, and a sample of smaller ones, to test for 29 PFAS and lithium. EPA published the final data in August 2026; its samples were collected from January 2023 to June 2026. A system that was not in the survey has no result here; that is not the same as having no PFAS.

UCMR 5 is a one-time national monitoring survey. Its results do not indicate compliance or non-compliance with the PFAS Maximum Contaminant Levels, which are enforced on running annual averages and take effect in 2029 (EPA has proposed allowing extensions to 2031). A single result above a limit on this page is a measurement, not a violation.

See how to read UCMR 5 results and our methodology for how systems are matched to places.

After Texas’s PFAS results

Find your system. Then read its report.

State recordsAll Texas water recordsCounties, ZIP reports, lead results and violations for the whole state.FiltersChoosing a PFAS filterHow to check a filter’s certified PFAS reduction before you buy.Your utilityFind your annual water reportYour utility’s Consumer Confidence Report will list its own PFAS results and any treatment plans.

County pages

Texas water records

Sources

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.