Texas tap water

State answer

28 of 1100 Texas water systems with full PFAS testing (3%) averaged above a 2024 federal PFAS level at one or more sampling points.

4,673 active community water systems in the EPA file; 1,009 serve 3,300+ people and have a full PFAS set.
1,479 systems had at least one health-based violation since 2021-10-26.
7 systems report a lead 90th percentile above 15 ppb (some results are old; check each system page).

Largest systems

System	People served	PFAS above a 2024 level?	Health-based violations since 2021-10-26
City of Houston	2,970,543	No	1
San Antonio Water System	2,643,729	No	0
Dallas Water Utility	1,356,479	No	0
City of Austin Water & Wastewater	1,115,323	No	1
City of Fort Worth	955,900	Yes, at one or more sampling points	0
El Paso Water Utilities	747,168	Yes, at one or more sampling points	0
City of Arlington	413,955	No	0
City of Corpus Christi	317,247	No	0

Counties

All 104 utilities with a page in Texas

Agua Sud 53,796
Amarillo Municipal Water System 201,291
Aqua Wsc 86,325
Brownsville Public Utilities Board 201,249
City of Abilene 130,501
City of Allen 113,746
City of Arlington 413,955
City of Austin Water & Wastewater 1,115,323
City of Baytown 86,004
City of Beaumont Water Utility dept 113,567
City of Bedford 49,941
City of Bryan 91,031
City of Burleson 53,381
City of Carrollton 136,170
City of Cedar Hill 50,904
City of Cedar Park 86,939
City of College Station 104,103
City of Conroe 113,912
City of Coppell 43,193
City of Copperas Cove 41,669
City of Corpus Christi 317,247
City of Denton 150,037
City of Desoto 57,999
City of Eagle Pass 54,900
City of Edinburg 85,224
City of Euless 61,601
City of Fort Worth 955,900
City of Friendswood 43,190
City of Frisco 231,910
City of Galveston 52,326
City of Garland 248,822
City of Georgetown 191,639
City of Grand Prairie 201,843
City of Grapevine 52,346
City of Haltom City 47,014
City of Houston 2,970,543
City of Houston Ud 5 - Kingwood 80,073
City of Huntsville 48,522
City of Irving 264,546
City of Keller 46,308
City of Killeen 161,027
City of Kyle 52,000
City of Laredo 260,046
City of League City 149,557
City of Leander 98,330
City of Lewisville 140,880
City of Longview 83,236
City of Lufkin 51,236
City of Mansfield 89,227
City of Mckinney 224,043
City of Mesquite 158,412
City of Midland Water Purification Plant 157,000
City of Mission 77,058
City of Nacogdoches 50,226
City of North Richland Hills 74,859
City of Odessa 123,334
City of Pasadena 152,000
City of Pearland 125,828
City of Pflugerville 63,464
City of Pharr 79,715
City of Plano 292,059
City of Richardson 122,615
City of Rockwall 55,250
City of Rosenberg 43,158
City of Round Rock 130,662
City of San Angelo 105,229
City of San Marcos 72,970
City of Schertz 41,948
City of Sherman 43,645
City of Sugar Land 80,381
City of Temple 94,935
City of Texas City 61,541
City of the Colony 45,367
City of Tyler 107,000
City of Victoria 66,932
City of Waco 146,241
City of Waxahachie 50,814
City of Wichita Falls 101,915
City of Wylie 48,393
Clear Lake City Water Authority 89,702
Clwsc Canyon Lake Shores 44,196
Dallas Water Utility 1,356,479
El Paso Water Utilities 747,168
Fort Bend County Wcid 2 49,173
Green Valley Sud 52,497
Harlingen Water Works System 85,900
Johnson County Sud 65,517
Laguna Madre Water District 46,674
Lower Valley Water District 59,049
Lubbock Public Water System 266,450
Mcallen Public Utility 145,050
Mustang Sud 127,911
New Braunfels Utilities 116,477
North Alamo Wsc 171,195
Rockett Sud 46,614
San Antonio Water System 2,643,729
Sharyland Wsc 68,562
Southern Utilities 69,735
Texas A&m University Main Campus 58,500
Texas State University - San Marcos 43,552
Town of Flower Mound 80,000
Town of Little Elm 43,348
Town of Prosper 42,598
Travis County Wcid 17 45,165

Why not "the state's water quality"? You drink from one utility, not a state. Rollups count systems, not people, so one large utility counts the same as a small one. Use the system pages for your actual water.

Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.

Sources and freshness

Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.