PFAS in Texas drinking water
EPA's final UCMR 5 data covers 1154 public water systems in Texas, serving about 30 million people. PFAS turned up in 622 of them (54%). 30 averaged above at least one EPA limit at a sampling point, affecting about 2.9 million people.
Highest PFOA and PFOS averages among systems serving 1,000 or more: City of Abilene (6.9 / 25.3 ppt), City of Grand Prairie (1.2 / 22.6 ppt), Dyess Air Force Base (5.6 / 17.9 ppt), Potosi WSC (4.5 / 18.1 ppt) and City of Pflugerville (6.3 / 13.9 ppt).
Every tested system in Texas
Largest first. PFOA and PFOS columns show the average at each system's worst sampling point; EPA's limit for each is 4 ppt. Filter by name:
| Water system | People | PFOA | PFOS | PFAS found | Result |
|---|---|---|---|---|---|
| City of Houston · Houston | 2,970,543 | - | - | 4 | Below limits |
| San Antonio Water System · San Antonio | 2,643,729 | - | - | 3 | Below limits |
| Dallas Water Utility · Dallas | 1,356,479 | 3.8 | 2.4 | 8 | Sample at limit |
| City of Austin Water & Wastewater · Austin | 1,115,323 | - | 1.2 | 6 | Sample at limit |
| City of Fort Worth · Fort Worth | 955,900 | 5.9 | 6.2 | 7 | Above limit |
| El Paso Water Utilities Public Service B · El Paso | 747,168 | - | 6.4 | 6 | Above limit |
| City of Arlington · Arlington | 413,955 | - | 3.2 | 5 | Sample at limit |
| City of Corpus Christi · Corpus Christi | 318,387 | - | - | 3 | Below limits |
| City of Plano · Plano | 292,059 | - | - | 4 | Below limits |
| Lubbock Public Water System · Lubbock | 275,041 | - | - | 1 | Below limits |
| City of Irving · Irving | 264,546 | 2.2 | 1.0 | 8 | Sample at limit |
| City of Laredo · Laredo | 260,046 | - | - | 1 | Below limits |
| City of Garland · Garland | 248,822 | - | - | 4 | Below limits |
| City of Frisco · Frisco | 231,910 | - | - | 4 | Below limits |
| City of Mckinney · Mckinney | 224,043 | - | - | 1 | Below limits |
| City of Grand Prairie · Grand Prairie | 201,843 | 1.2 | 22.6 | 8 | Above limit |
| Amarillo Municipal Water System · Amarillo | 201,291 | - | - | 1 | Below limits |
| Brownsville Public Utilities Board · Brownsville | 201,249 | 1.2 | 6.5 | 7 | Above limit |
| City of Georgetown · Georgetown | 191,639 | 1.2 | 3.6 | 7 | Sample at limit |
| Mcallen Public Utility · Mcallen | 189,957 | - | - | 1 | Below limits |
| Dallas Fort Worth International Airport · Dallas | 177,673 | - | - | 3 | Below limits |
| North Alamo WSC · Edinburg | 171,195 | - | - | 5 | Below limits |
| City of Killeen · Killeen | 161,027 | - | - | 3 | Below limits |
| City of Midland Water Purification Plant · Midland | 157,000 | - | 1.1 | 6 | Sample at limit |
| City of Mesquite · Mesquite | 152,020 | - | - | 4 | Below limits |
| City of Pasadena · Pasadena | 152,000 | - | 3.3 | 7 | Sample at limit |
| City of Denton · Denton | 150,037 | - | - | 4 | Below limits |
| City of League City · League City | 149,557 | - | 2.2 | 6 | Sample at limit |
| City of Waco · Waco | 146,241 | - | - | 1 | Below limits |
| City of Lewisville · Lewisville | 140,880 | - | - | 4 | Below limits |
| City of Carrollton · Carrollton | 136,170 | - | - | 4 | Below limits |
| City of Round Rock · Round Rock | 130,662 | - | - | 4 | Below limits |
| City of Abilene · Abilene | 130,501 | 6.9 | 25.3 | 9 | Above limit |
| City of Pearland · Pearland | 125,828 | - | 2.2 | 6 | Sample at limit |
| City of Odessa · Odessa | 123,334 | - | - | 3 | Below limits |
| City of Richardson · Richardson | 122,615 | - | - | 4 | Below limits |
| New Braunfels Utilities · New Braunfels | 116,477 | - | - | 4 | Below limits |
| City of Beaumont Water Utility Dept · Beaumont | 115,282 | - | - | 0 | None found |
| City of Conroe · Conroe | 113,912 | - | - | 0 | None found |
| City of Allen · Allen | 113,746 | - | - | 4 | Below limits |
| Mustang SUD · Aubrey | 110,826 | - | - | 3 | Below limits |
| City of Tyler · Tyler | 107,000 | - | - | 2 | Below limits |
| City of San Angelo · San Angelo | 105,229 | - | - | 5 | Below limits |
| City of College Station · College Station | 104,103 | - | - | 4 | Below limits |
| City of Wichita Falls · Wichita Falls | 102,316 | - | - | 3 | Below limits |
| City of Leander · Leander | 98,330 | - | - | 1 | Below limits |
| City of Temple · Temple | 94,935 | - | 1.2 | 6 | Sample at limit |
| City of Bryan · Bryan | 91,031 | - | - | 0 | None found |
| City of Sugar Land · Sugar Land | 90,909 | 1.0 | - | 8 | Sample at limit |
| Clear Lake City Water Authority · Houston | 89,702 | 1.0 | 5.7 | 8 | Above limit |
| City of Mansfield · Mansfield | 89,227 | - | - | 3 | Below limits |
| City of Cedar Park · Cedar Park | 86,939 | - | - | 1 | Below limits |
| Aqua WSC · Bastrop | 86,325 | - | - | 0 | None found |
| City of Baytown · Baytown | 86,004 | - | 4.7 | 7 | Above limit |
| Harlingen Water Works System · Harlingen | 85,900 | - | - | 3 | Below limits |
| City of Edinburg · Edinburg | 85,224 | - | 1.1 | 3 | Sample at limit |
| City of Longview · Longview | 83,236 | - | - | 0 | None found |
| City of Houston UD 5 - Kingwood · Houston | 80,073 | - | - | 0 | None found |
| Town of Flower Mound · Flower Mound | 80,000 | 1.1 | - | 6 | Sample at limit |
| City of Pharr · Pharr | 79,715 | - | - | 1 | Below limits |
| City of Mission · Mission | 77,058 | - | - | 1 | Below limits |
| City of North Richland Hills · North Richland Hills | 74,859 | 1.1 | 1.1 | 7 | Sample at limit |
| City of San Marcos · San Marcos | 72,970 | - | - | 3 | Below limits |
| Southern Utilities · Tyler | 69,735 | - | - | 1 | Below limits |
| Sharyland WSC · Mission | 68,562 | 1.1 | 2.9 | 8 | Sample at limit |
| City of Rowlett · Rowlett | 68,123 | - | - | 4 | Below limits |
| City of Victoria · Victoria | 66,932 | - | - | 1 | Below limits |
| Johnson County SUD · Joshua | 65,517 | - | - | 4 | Below limits |
| City of Pflugerville · Pflugerville | 63,464 | 6.3 | 13.9 | 10 | Above limit |
| City of Euless · Euless | 61,601 | - | - | 4 | Below limits |
| City of Texas City · Texas City | 61,541 | - | - | 4 | Below limits |
| Lower Valley Water District · Clint | 59,049 | - | - | 3 | Below limits |
| Texas A&m University Main Campus · College Station | 58,500 | - | - | 0 | None found |
| City of Desoto · Desoto | 57,999 | - | - | 4 | Below limits |
| City of Port Arthur · Port Arthur | 56,039 | - | - | 1 | Below limits |
| City of Rockwall · Rockwall | 55,250 | - | - | 4 | Below limits |
| City of Eagle Pass · Eagle Pass | 54,900 | - | - | 0 | None found |
| Agua SUD · Mission | 53,796 | - | - | 3 | Below limits |
| City of Burleson · Burleson | 53,381 | - | - | 4 | Below limits |
| City of Celina · Celina | 52,701 | - | - | 1 | Below limits |
| Green Valley SUD · Marion | 52,497 | - | - | 1 | Below limits |
| City of Grapevine · Grapevine | 52,346 | 3.4 | 2.5 | 7 | Sample at limit |
| City of Galveston · Galveston | 52,326 | - | - | 4 | Below limits |
| City of Kyle · Kyle | 52,000 | - | - | 3 | Below limits |
| City of Lufkin · Lufkin | 51,236 | - | - | 1 | Below limits |
| City of Cedar Hill · Cedar Hill | 50,904 | - | - | 4 | Below limits |
| City of Waxahachie · Waxahachie | 50,814 | - | - | 4 | Below limits |
| City of Nacogdoches · Nacogdoches | 50,226 | - | - | 0 | None found |
| City of Bedford · Bedford | 49,941 | - | 0.9 | 5 | Sample at limit |
| Fort Bend County Wcid 2 · Stafford | 49,173 | - | - | 4 | Below limits |
| City of Huntsville · Huntsville | 48,522 | 2.5 | 7.1 | 8 | Above limit |
| City of Wylie · Wylie | 48,393 | - | - | 4 | Below limits |
| Laguna Madre Water District · Port Isabel | 46,674 | - | - | 3 | Below limits |
| Rockett SUD · Red Oak | 46,614 | - | - | 4 | Below limits |
| City of Keller · Keller | 46,308 | - | 2.5 | 6 | Sample at limit |
| City of Haltom City · Haltom City | 46,260 | 3.8 | 6.0 | 7 | Above limit |
| City of the Colony · The Colony | 45,367 | - | - | 4 | Below limits |
| Travis County Wcid 17 · Austin | 45,165 | - | - | 1 | Below limits |
| Clwsc Canyon Lake Shores · Canyon Lake | 44,196 | - | - | 1 | Below limits |
| City of Sherman · Sherman | 43,645 | - | - | 3 | Below limits |
| Texas State University - San Marcos · San Marcos | 43,552 | - | - | 0 | None found |
| City of Coppell · Coppell | 43,193 | - | - | 4 | Below limits |
| City of Friendswood · Friendswood | 43,190 | - | - | 3 | Below limits |
| City of Rosenberg · Rosenberg | 43,158 | - | - | 4 | Below limits |
| Town of Prosper · Prosper | 42,598 | - | 1.2 | 6 | Sample at limit |
| City of Schertz · Schertz | 41,948 | - | - | 0 | None found |
| City of Copperas Cove · Copperas Cove | 41,669 | - | 1.0 | 5 | Sample at limit |
| Town of Little Elm · Little Elm | 41,000 | - | - | 4 | Below limits |
| Harris County MUD 165 · Houston | 40,503 | - | - | 2 | Below limits |
| City of Hurst · Hurst | 40,454 | - | - | 3 | Below limits |
| City of Lancaster · Lancaster | 40,449 | - | - | 4 | Below limits |
| City of Farmers Branch · Farmers Branch | 40,246 | 2.2 | - | 6 | Sample at limit |
| City of Weslaco · Weslaco | 40,033 | - | 5.3 | 6 | Above limit |
| Manville WSC · Coupland | 39,648 | 2.9 | 11.0 | 10 | Above limit |
| City of Duncanville · Duncanville | 39,413 | - | 1.1 | 5 | Sample at limit |
| Jbsa - Sam Houston · San Antonio | 37,563 | - | - | 0 | None found |
| City of Princeton · Princeton | 37,019 | - | - | 1 | Below limits |
| Texarkana Water Utilities · Texarkana | 37,000 | - | - | 0 | None found |
| Paseo Del Este MUD 1 · Austin | 36,773 | - | - | 1 | Below limits |
| City of La Porte · La Porte | 36,569 | - | - | 3 | Below limits |
| Del Rio Utilities Commission · Del Rio | 36,506 | - | - | 0 | None found |
| City of Harker Heights · Harker Heights | 35,957 | - | - | 3 | Below limits |
| City of Weatherford · Weatherford | 35,903 | - | 2.4 | 5 | Sample at limit |
| Us Army South Fort Hood · Fort Hood | 35,669 | - | - | 4 | Below limits |
| West Travis County Public Utility Agency · Austin | 35,664 | - | - | 1 | Below limits |
| Springs Hill WSC · Seguin | 35,541 | - | 1.1 | 3 | Sample at limit |
| Goforth SUD · Niederwald | 34,893 | - | - | 5 | Below limits |
| City of Deer Park · Deer Park | 34,495 | - | 2.2 | 6 | Sample at limit |
| City of Cleburne · Cleburne | 34,075 | - | - | 1 | Below limits |
| City of Fulshear · Fulshear | 34,000 | - | - | 0 | None found |
| Bethesda WSC · Burleson | 33,441 | - | - | 1 | Below limits |
| City of Greenville · Greenville | 33,354 | - | 6.0 | 5 | Above limit |
| Sjwtx Triple Peak Plant · Canyon Lake | 32,973 | - | 4.7 | 3 | Above limit |
| City of Seguin · Seguin | 32,736 | - | - | 2 | Below limits |
| Benton City WSC · Lytle | 32,000 | - | - | 0 | None found |
| City of Southlake · Southlake | 31,576 | - | 2.0 | 6 | Sample at limit |
| Horizon Regional MUD · Horizon City | 31,542 | - | - | 0 | None found |
| Lumberton MUD · Lumberton | 31,428 | - | - | 0 | None found |
| City of Palestine · Palestine | 31,272 | - | - | 1 | Below limits |
| City of Sachse · Sachse | 30,630 | - | - | 4 | Below limits |
| Galveston County Wcid 1 · Dickinson | 30,399 | - | - | 4 | Below limits |
| Walnut Creek SUD · Springtown | 30,364 | - | - | 1 | Below limits |
| City of San Juan · San Juan | 30,000 | - | 1.1 | 6 | Sample at limit |
| Jonah Water SUD · Hutto | 29,861 | 1.3 | 2.9 | 7 | Sample at limit |
| City of Converse · Converse | 29,709 | - | - | 0 | None found |
| City of Forney · Forney | 29,692 | - | 3.6 | 6 | Sample at limit |
| City of Hutto · Hutto | 29,580 | - | - | 0 | None found |
| City of Fate · Fate | 29,285 | - | - | 4 | Below limits |
| City of Balch Springs · Balch Springs | 28,300 | - | 1.1 | 5 | Sample at limit |
| Fort Bliss Main Post Area · San Dimas | 28,000 | - | - | 2 | Below limits |
| City of Midlothian · Midlothian | 27,699 | 1.6 | - | 6 | Sample at limit |
| City of Denison · Denison | 27,500 | - | - | 0 | None found |
| City of Lake Jackson · Lake Jackson | 27,314 | - | - | 3 | Below limits |
| City of Big Spring · Big Spring | 27,282 | - | 1.1 | 5 | Sample at limit |
| City of Colleyville · Colleyville | 26,599 | - | 2.5 | 6 | Sample at limit |
| Porter SUD · Porter | 26,388 | - | - | 0 | None found |
| City of Alvin · Alvin | 26,244 | - | - | 0 | None found |
| City of Melissa · Melissa | 26,234 | - | - | 1 | Below limits |
| East Central SUD · Adkins | 26,137 | - | - | 0 | None found |
| Montgomery Trace · Navasota | 25,917 | 2.4 | - | 1 | Sample at limit |
| City of Corsicana · Corsicana | 25,885 | - | - | 3 | Below limits |
| Cash SUD · Greenville | 25,875 | - | 4.4 | 6 | Above limit |
| City of University Park · Dallas | 25,617 | 2.5 | 1.1 | 8 | Sample at limit |
| Benbrook Water Authority · Benbrook | 25,616 | - | - | 3 | Below limits |
| Lamar County Water Supply District · Paris | 25,569 | - | - | 0 | None found |
| City of Paris · Paris | 25,498 | - | - | 0 | None found |
| Northwest Harris County MUD 5 · Houston | 25,425 | - | - | 3 | Below limits |
| City of Kingsville · Kingsville | 25,402 | - | - | 4 | Below limits |
| City of Richmond · Richmond | 25,326 | - | - | 4 | Below limits |
| City of Katy · Katy | 25,253 | - | - | 0 | None found |
| Wellborn SUD · Wellborn | 25,092 | - | - | 1 | Below limits |
| City of Ennis · Ennis | 24,891 | - | - | 4 | Below limits |
| City of Boerne · Boerne | 24,769 | 3.0 | 16.7 | 7 | Above limit |
| East Rio Hondo WSC · Rio Hondo | 24,756 | 1.4 | 3.8 | 8 | Sample at limit |
| Culleoka WSC · Princeton | 24,615 | - | - | 2 | Below limits |
| Bridgestone MUD · Houston | 24,528 | - | - | 1 | Below limits |
| Timber Lane Utility District · Houston | 24,507 | - | - | 0 | None found |
| West Cedar Creek MUD · Tool | 24,414 | - | - | 1 | Below limits |
| Montgomery County MUD 46 · The Woodlands | 24,399 | - | - | 1 | Below limits |
| City of Royse City · Royse City | 24,313 | - | - | 4 | Below limits |
| City of San Benito · San Benito | 24,250 | - | 2.3 | 6 | Sample at limit |
| Montgomery County MUD 47 · The Woodlands | 24,171 | - | - | 0 | None found |
| Mountain Peak SUD · Midlothian | 23,988 | - | 3.1 | 5 | Sample at limit |
| City of Anna · Anna | 23,960 | - | - | 1 | Below limits |
| City of Saginaw · Saginaw | 23,890 | - | - | 3 | Below limits |
| City of Watauga · Watauga | 23,806 | - | - | 5 | Below limits |
| City of Kerrville · Kerrville | 23,489 | - | - | 1 | Below limits |
| City of Corinth · Corinth | 23,213 | - | - | 4 | Below limits |
| City of Stephenville · Stephenville | 23,110 | - | - | 0 | None found |
| City of Marshall · Marshall | 23,091 | - | - | 1 | Below limits |
| City of Belton · Belton | 23,054 | - | - | 4 | Below limits |
| City of Portland · Portland | 22,933 | - | - | 3 | Below limits |
| Windermere Community · Austin | 21,231 | - | 7.3 | 6 | Above limit |
| Plainview Municipal Water System · Plainview | 21,104 | - | - | 1 | Below limits |
| City of Murphy · Murphy | 21,082 | - | - | 4 | Below limits |
| City of Alamo · Alamo | 21,065 | - | - | 3 | Below limits |
| Jbsa - Lackland · Jbsa Lackland | 20,907 | - | - | 0 | None found |
| S S WSC · Lavernia | 20,826 | - | - | 0 | None found |
| Crystal Clear SUD · San Marcos | 20,766 | - | - | 2 | Below limits |
| Sardis Lone Elm WSC · Midlothian | 20,736 | - | - | 4 | Below limits |
| City of Taylor · Taylor | 20,622 | 2.2 | - | 5 | Sample at limit |
| Acton MUD · Granbury | 20,458 | - | - | 0 | None found |
| Forney Lake WSC · Rockwall | 20,377 | - | - | 4 | Below limits |
| City of Cibolo · Cibolo | 20,331 | - | - | 1 | Below limits |
| City of Seagoville · Seagoville | 20,156 | - | 1.3 | 5 | Sample at limit |
| City of Universal City · Universal City | 20,119 | - | - | 0 | None found |
| City of Crowley · Crowley | 19,935 | - | - | 1 | Below limits |
| Harris County Fwsd 51 · Houston | 19,671 | - | - | 4 | Below limits |
| City of Manor · Manor | 19,620 | - | - | 2 | Below limits |
| County Line SUD · Uhland | 19,609 | - | - | 1 | Below limits |
| Sheppard Air Force Base · Sheppard Afb | 19,500 | - | - | 3 | Below limits |
| City of Roma · Roma | 19,464 | - | - | 1 | Below limits |
| City of Angleton · Angleton | 19,429 | - | - | 5 | Below limits |
| Cimarron MUD · Houston | 19,338 | - | - | 0 | None found |
| City of Orange · Orange | 19,300 | - | - | 0 | None found |
| City of West University Place · West University Place | 19,200 | - | 3.7 | 6 | Sample at limit |
| City of Alice · Alice | 19,104 | - | - | 1 | Below limits |
| Harris County MUD 82 · Houston | 18,990 | - | - | 0 | None found |
| City of Rio Grande City · Rio Grande | 18,912 | - | - | 1 | Below limits |
| City of Brownwood · Brownwood | 18,862 | - | - | 1 | Below limits |
| City of Lockhart · Lockhart | 18,800 | - | - | 0 | None found |
| City of Donna · Donna | 18,720 | - | 3.1 | 6 | Sample at limit |
| City of Glenn Heights · Glenn Heights | 18,718 | - | - | 4 | Below limits |
| City of Red Oak · Red Oak | 18,577 | - | - | 4 | Below limits |
| City of White Settlement · White Settlement | 18,522 | - | 3.5 | 6 | Sample at limit |
| City of Brenham · Brenham | 18,469 | - | - | 2 | Below limits |
| City of Terrell · Terrell | 18,432 | - | 7.2 | 6 | Above limit |
| Bolivar Peninsula SUD · Crystal Beach | 18,424 | - | - | 0 | None found |
| Brushy Creek MUD · Round Rock | 18,314 | - | - | 5 | Below limits |
| Northwest Park MUD · Houston | 18,168 | - | - | 0 | None found |
| City of Nederland · Nederland | 18,157 | - | - | 0 | None found |
| Clear Brook City MUD · Houston | 18,108 | - | 2.2 | 6 | Sample at limit |
| City of Gainesville · Gainesville | 18,107 | - | - | 0 | None found |
| City of Bellaire · Bellaire | 18,090 | - | - | 5 | Below limits |
| City of Bay City · Bay City | 18,061 | - | - | 0 | None found |
| Harris Montgomery Counties MUD 386 · Houston | 18,018 | - | - | 0 | None found |
| Wells Branch MUD 1 · Austin | 18,015 | - | - | 1 | Below limits |
| City of Pampa · Pampa | 17,994 | - | - | 1 | Below limits |
| City of Pleasanton · Pleasanton | 17,985 | - | - | 0 | None found |
| Military Hwy WSC Las Rusias · Progreso | 17,943 | - | - | 0 | None found |
| City of Athens · Athens | 17,934 | - | - | 0 | None found |
| Harris County MUD 53 · Houston | 17,856 | - | - | 5 | Below limits |
| Lake Cities Municipal Utility Authority · Lake Dallas | 17,826 | - | - | 4 | Below limits |
| Kempner WSC · Kempner | 17,721 | - | - | 3 | Below limits |
| Tri SUD · Mount Pleasant | 17,641 | - | - | 1 | Below limits |
| East Fork SUD · Wylie | 17,589 | - | - | 4 | Below limits |
| City of Tomball · Tomball | 17,532 | - | - | 0 | None found |
| City of Uvalde · Uvalde | 17,450 | - | - | 0 | None found |
| City of South Houston · South Houston | 17,397 | - | 2.1 | 6 | Sample at limit |
| City of Groves · Groves | 17,335 | - | - | 0 | None found |
| Town of Addison · Addison | 17,257 | - | - | 4 | Below limits |
| Harris County MUD 26 · Houston | 17,178 | - | - | 0 | None found |
| Harris County MUD 71 · Houston | 17,079 | - | - | 0 | None found |
| City of Port Neches · Port Neches | 17,043 | - | - | 0 | None found |
| City of Hewitt · Hewitt | 16,978 | - | - | 1 | Below limits |
| Montgomery County MUD 67 · The Woodlands | 16,821 | - | - | 0 | None found |
| Fort Bend County MUD 30 · Houston | 16,794 | - | - | 3 | Below limits |
| Harris County MUD 167 · Houston | 16,761 | - | - | 0 | None found |
| Sonterra MUD · Austin | 16,614 | - | - | 4 | Below limits |
| City of Highland Village · Highland Village | 16,500 | - | - | 5 | Below limits |
| Harris County MUD 55 Heritage Park · Houston | 16,392 | - | - | 4 | Below limits |
| High Point Water Supply Corporation · Forney | 16,341 | - | - | 2 | Below limits |
| City of Mercedes · Mercedes | 16,258 | - | - | 1 | Below limits |
| City of Sulphur Springs · Sulphur Springs | 16,243 | - | - | 0 | None found |
| City of Mount Pleasant · Mount Pleasant | 16,238 | - | - | 1 | Below limits |
| City of Gatesville · Gatesville | 16,135 | - | - | 2 | Below limits |
| Maxwell WSC · Maxwell | 16,104 | - | - | 2 | Below limits |
| Hereford Municipal Water System · Hereford | 16,048 | - | - | 0 | None found |
| Talty SUD · Forney | 15,987 | - | 2.2 | 5 | Sample at limit |
| Bear Creek SUD · Lavon | 15,822 | - | - | 5 | Below limits |
| Canyon Municipal Water System · Canyon | 15,771 | - | - | 1 | Below limits |
| City of Humble · Humble | 15,616 | - | - | 4 | Below limits |
| City of Mineral Wells · Mineral Wells | 15,564 | - | - | 1 | Below limits |
| City of Sugar Land - New Territory · Sugar Land | 15,546 | - | - | 0 | None found |
| Harris County Fwsd 61 · Houston | 15,400 | - | - | 0 | None found |
| City of Dayton · Dayton | 15,393 | - | - | 0 | None found |
| Fort Bend County MUD 25 · Richmond | 15,327 | - | - | 0 | None found |
| Ector County Utility District · Odessa | 15,300 | - | - | 3 | Below limits |
| Orange County Wcid 1 · Vidor | 15,258 | - | - | 1 | Below limits |
| City of Mabank · Mabank | 15,207 | - | - | 1 | Below limits |
| City of Livingston · Livingston | 15,199 | 1.2 | 4.6 | 8 | Above limit |
| City of La Marque · La Marque | 15,154 | - | - | 4 | Below limits |
| Montgomery County MUD 60 · The Woodlands | 15,036 | - | - | 0 | None found |
| Wickson Creek SUD · Bryan | 15,000 | - | - | 2 | Below limits |
| East Biggs Water System · San Dimas | 15,000 | - | - | 2 | Below limits |
| City of Kilgore · Kilgore | 14,948 | - | - | 1 | Below limits |
| Harris County MUD 105 · Houston | 14,925 | - | - | 3 | Below limits |
| Pecan Grove MUD · Houston | 14,913 | - | - | 5 | Below limits |
| Nueces County Wcid 4 · Port Aransas | 14,880 | - | - | 1 | Below limits |
| Harris County MUD 200 Cranbrook · Houston | 14,868 | - | - | 3 | Below limits |
| City of Azle · Azle | 14,847 | - | - | 2 | Below limits |
| East Cedar Creek Fwsd Brookshire · Mabank | 14,823 | - | - | 2 | Below limits |
| City of Hidalgo · Hidalgo | 14,800 | - | - | 0 | None found |
| Harris County MUD 24 · Houston | 14,796 | - | - | 3 | Below limits |
| Lindale Rural WSC · Lindale | 14,781 | - | - | 0 | None found |
| Cnp Utility District · Houston | 14,718 | - | - | 3 | Below limits |
| Lee County WSC · Giddings | 14,670 | - | - | 0 | None found |
| City of Henderson · Henderson | 14,666 | - | - | 1 | Below limits |
| Macedonia Eylau MUD 1 · Texarkana | 14,652 | - | - | 0 | None found |
| Caddo Basin SUD · Greenville | 14,574 | - | - | 4 | Below limits |
| City of Jacksonville · Jacksonville | 14,420 | - | - | 3 | Below limits |
| Quail Valley Utility District · Missouri City | 14,409 | - | - | 0 | None found |
| New Caney MUD · New Caney | 14,307 | - | - | 0 | None found |
| City of Dumas · Dumas | 14,290 | - | - | 0 | None found |
| Harris County MUD 285 · Houston | 14,268 | - | - | 5 | Below limits |
| City of Houston Willow Chase · Houston | 14,169 | - | - | 0 | None found |
| City of Willis · Willis | 14,133 | - | - | 0 | None found |
| City of Andrews · Andrews | 14,109 | - | - | 0 | None found |
| Nueces County Wcid 3 · Robstown | 14,000 | - | - | 1 | Below limits |
| Meadowhill Regional MUD · Houston | 13,863 | - | - | 0 | None found |
| Atascosa Rural WSC · Atascosa | 13,857 | - | - | 0 | None found |
| Harris County Wcid 21 · Channelview | 13,845 | - | - | 2 | Below limits |
| City of Buda · Buda | 13,830 | - | - | 2 | Below limits |
| Remington MUD 1 · Houston | 13,746 | - | - | 4 | Below limits |
| Zapata County Waterworks Swtp · Zapata | 13,736 | - | - | 1 | Below limits |
| City of Webster · Webster | 13,710 | - | 5.2 | 7 | Above limit |
| City of Forest Hill · Forest Hill | 13,701 | - | - | 4 | Below limits |
| Cypress Springs SUD N Plant 1 and Ne Pla · Mount Vernon | 13,698 | - | - | 1 | Below limits |
| Fort Bend County MUD 23 · Houston | 13,695 | - | - | 0 | None found |
| City of Beeville · Beeville | 13,664 | - | - | 4 | Below limits |
| Trophy Club MUD 1 · Trophy Club | 13,649 | - | - | 1 | Below limits |
| City of Seabrook · Seabrook | 13,560 | - | - | 5 | Below limits |
| Southern Montgomery County MUD · Houston | 13,372 | - | - | 0 | None found |
| Denton County Fwsd 7 Lantana · Lantana | 13,325 | - | - | 4 | Below limits |
| City of Bastrop · Bastrop | 13,209 | - | - | 0 | None found |
| College Mound SUD · Terrell | 13,200 | - | 1.4 | 6 | Sample at limit |
| Harris County MUD 120 · Houston | 13,197 | - | - | 0 | None found |
| Newport MUD · Houston | 13,191 | - | - | 3 | Below limits |
| City of Elgin · Elgin | 13,188 | - | - | 0 | None found |
| Harris County MUD 157 · Houston | 13,062 | - | - | 4 | Below limits |
| Harris County MUD 168 · Sugar Land | 13,029 | - | - | 0 | None found |
| Brookesmith Special Utility District · Brownwood | 13,026 | - | - | 1 | Below limits |
| Kingsland WSC · Kingsland | 12,975 | - | - | 0 | None found |
| City of Pecos · Pecos | 12,916 | - | - | 0 | None found |
| City of Mont Belvieu · Mont Belvieu | 12,864 | - | - | 0 | None found |
| Bi County WSC 1 · Pittsburg | 12,777 | - | - | 1 | Below limits |
| City of Horseshoe Bay · Horseshoe Bay | 12,729 | - | - | 1 | Below limits |
| Argyle WSC · Argyle | 12,720 | - | - | 4 | Below limits |
| City of Levelland · Levelland | 12,652 | - | 1.1 | 1 | Sample at limit |
| Montgomery County MUD 7 · The Woodlands | 12,528 | - | - | 0 | None found |
| City of Cleveland · Cleveland | 12,438 | - | - | 0 | None found |
| Borger Municipal Water System · Borger | 12,419 | - | - | 0 | None found |
| City of Sweetwater · Sweetwater | 12,401 | - | - | 1 | Below limits |
| City of Sugar Land - Greatwood · Sugar Land | 12,368 | - | - | 0 | None found |
| Harris County MUD 1 · Houston | 12,342 | - | - | 0 | None found |
| Military Hwy WSC Progreso · Progreso | 12,198 | - | - | 0 | None found |
| Yancey WSC · Yancey | 12,186 | - | - | 0 | None found |
| Northampton MUD · Houston | 12,162 | - | - | 0 | None found |
| City of El Campo · El Campo | 12,095 | - | - | 0 | None found |
| City of Port Lavaca · Port Lavaca | 12,000 | 3.0 | 1.2 | 7 | Sample at limit |
| Bolivar WSC · Sanger | 11,901 | - | - | 0 | None found |
| City of Robinson · Robinson | 11,900 | - | - | 5 | Below limits |
| Harris County MUD 368 · Houston | 11,835 | - | - | 3 | Below limits |
| Harris County MUD 153 · Houston | 11,781 | - | - | 0 | None found |
| Southwest Milam WSC · Rockdale | 11,739 | - | - | 0 | None found |
| San Leon MUD · San Leon | 11,622 | - | - | 4 | Below limits |
| Fort Bend County MUD 142 · Houston | 11,595 | - | 1.1 | 7 | Sample at limit |
| Rayford Road MUD · Houston | 11,550 | - | - | 0 | None found |
| Northtown MUD · Austin | 11,520 | - | - | 1 | Below limits |
| Harris County MUD 81 · Houston | 11,514 | - | - | 0 | None found |
| East Montana Water System · El Paso | 11,480 | - | - | 4 | Below limits |
| City of Granbury · Granbury | 11,468 | - | - | 0 | None found |
| Salado WSC · Salado | 11,460 | - | - | 4 | Below limits |
| Wylie Northeast SUD · Wylie | 11,430 | - | - | 4 | Below limits |
| City of Selma · Selma | 11,418 | - | - | 0 | None found |
| Memorial Villages Water Authority · Houston | 11,382 | - | - | 2 | Below limits |
| City of Raymondville · Raymondville | 11,288 | - | - | 1 | Below limits |
| Harris County Utility District 6 · Houston | 11,262 | - | - | 3 | Below limits |
| City of Fredericksburg · Fredericksburg | 11,257 | - | - | 0 | None found |
| G M WSC · Hemphill | 11,220 | - | - | 5 | Below limits |
| City of Rockport · Rockport | 11,186 | - | - | 2 | Below limits |
| Gastonia Scurry SUD · Scurry | 11,169 | - | 1.1 | 6 | Sample at limit |
| North Austin MUD 1 · Austin | 11,133 | - | - | 0 | None found |
| City of Snyder · Snyder | 11,104 | - | - | 1 | Below limits |
| Town of Fairview · Fairview | 11,100 | - | - | 2 | Below limits |
| Harris County Wcid 36 · Houston | 11,073 | - | 1.0 | 5 | Sample at limit |
| Cypress Hill MUD 1 · Houston | 11,052 | - | - | 0 | None found |
| City of Hondo · Hondo | 11,044 | - | - | 0 | None found |
| City of Vernon · Vernon | 11,002 | - | - | 0 | None found |
| City of Burkburnett · Burkburnett | 10,978 | - | - | 3 | Below limits |
| Jbsa - Randolph · San Antonio | 10,949 | - | - | 0 | None found |
| Hudson WSC · Lufkin | 10,907 | - | - | 0 | None found |
| Harris County MUD 49 · Houston | 10,893 | - | - | 3 | Below limits |
| Tryon Road SUD · Longview | 10,791 | - | - | 0 | None found |
| City of Bonham · Bonham | 10,746 | - | - | 1 | Below limits |
| North Collin SUD · Melissa | 10,716 | - | - | 1 | Below limits |
| City of Bellmead · Bellmead | 10,664 | - | - | 0 | None found |
| Fort Bend County MUD 58 · Houston | 10,629 | - | - | 3 | Below limits |
| City of Clute · Clute | 10,604 | - | - | 6 | Below limits |
| City of Freeport · Freeport | 10,594 | - | - | 4 | Below limits |
| Harris County MUD 278 · Houston | 10,584 | - | - | 3 | Below limits |
| City of Bruceville Eddy · Eddy | 10,570 | - | - | 1 | Below limits |
| Harris County Wcid 96 · Houston | 10,530 | - | - | 3 | Below limits |
| Greenwood Utility District · Houston | 10,527 | - | - | 3 | Below limits |
| Lakeway MUD · Lakeway | 10,512 | - | - | 0 | None found |
| City of Galena Park · Galena Park | 10,487 | - | 1.0 | 6 | Sample at limit |
| The Consolidated WSC Rural System · Crockett | 10,481 | - | - | 0 | None found |
| City of Heath · Heath | 10,464 | - | - | 4 | Below limits |
| Town of Northlake · Northlake | 10,430 | - | - | 4 | Below limits |
| Harris County MUD 230 · Houston | 10,404 | - | - | 3 | Below limits |
| Harris County MUD 102 · Houston | 10,401 | - | - | 5 | Below limits |
| Langham Creek Utility District · Houston | 10,377 | - | - | 5 | Below limits |
| Mauriceville MUD · Mauriceville | 10,374 | - | - | 0 | None found |
| Gonzales County WSC · Gonzales | 10,350 | - | - | 2 | Below limits |
| Fort Bend County MUD 151 · Houston | 10,233 | - | - | 0 | None found |
| Rice WSC · Ennis | 10,167 | - | - | 4 | Below limits |
| City of Sanger · Sanger | 10,166 | - | - | 1 | Below limits |
| Mission Bend MUD 2 · Houston | 10,155 | - | - | 0 | None found |
| Harris County Wcid 109 · Houston | 10,134 | - | - | 3 | Below limits |
| City of Roanoke · Roanoke | 10,127 | - | - | 4 | Below limits |
| City of Ingleside · Ingleside | 10,106 | - | - | 3 | Below limits |
| Ponderosa Forest Utility District · Houston | 10,101 | - | - | 1 | Below limits |
| Pritchett Water Supply Corporation · Gilmer | 10,089 | - | - | 0 | None found |
| Concord-robbins WSC · Marquez | 10,035 | - | - | 0 | None found |
| City of Silsbee · Silsbee | 10,026 | - | - | 0 | None found |
| Austins Colony · Austin | 9,987 | - | - | 5 | Below limits |
| City of Jasper · Jasper | 9,884 | - | - | 0 | None found |
| City of Cuero · Cuero | 9,807 | - | - | 0 | None found |
| Harris County Wcid 110 · Houston | 9,807 | - | - | 1 | Below limits |
| City of Josephine · Josephine | 9,800 | - | - | 4 | Below limits |
| Fair Oaks Ranch Utilities · Fair Oaks Ranch | 9,768 | - | - | 0 | None found |
| Jarrell Schwertner WSC · Jarrell | 9,681 | - | - | 2 | Below limits |
| Mccoy WSC · Pleasanton | 9,621 | - | - | 1 | Below limits |
| City of Jacinto City · Jacinto City | 9,613 | - | - | 0 | None found |
| City of Splendora · Splendora | 9,612 | - | - | 0 | None found |
| City of Wolfforth · Wolfforth | 9,600 | - | - | 0 | None found |
| City of Whitehouse · Whitehouse | 9,571 | - | - | 0 | None found |
| Prairie View A&m University · Prairie View | 9,550 | - | - | 0 | None found |
| City of Bridge City · City of Bridge City | 9,546 | - | - | 0 | None found |
| Harris County MUD 109 · Houston | 9,501 | - | - | 0 | None found |
| City of La Grulla · La Grulla | 9,500 | - | - | 3 | Below limits |
| Trail of the Lakes MUD · Houston | 9,480 | - | - | 0 | None found |
| Harris County MUD 188 · Houston | 9,453 | - | - | 3 | Below limits |
| El Paso County Wcid 4 Fabens · Fabens | 9,444 | - | - | 0 | None found |
| City of Lamesa · Lamesa | 9,442 | - | - | 0 | None found |
| El Jardin WSC · Brownsville | 9,423 | 1.1 | 1.1 | 8 | Sample at limit |
| Hunters Glen MUD · Houston | 9,405 | - | - | 0 | None found |
| City of Woodway · Woodway | 9,383 | - | - | 1 | Below limits |
| West Jefferson County Mwd · Beaumont | 9,367 | - | - | 0 | None found |
| Harris-fort Bend Counties MUD 3 · Houston | 9,297 | - | - | 0 | None found |
| City of Commerce · Commerce | 9,266 | - | - | 1 | Below limits |
| Central Bowie County WSC · New Boston | 9,210 | - | - | 1 | Below limits |
| Travis County Wcid 10 · West Lake Hills | 9,204 | - | 1.4 | 5 | Sample at limit |
| Southwest Fannin County SUD · Savoy | 9,198 | - | - | 0 | None found |
| City of Gonzales · Gonzales | 9,172 | - | - | 5 | Below limits |
| Harris County Wcid 119 · Houston | 9,150 | - | - | 4 | Below limits |
| Sharon WSC · Winnsboro | 9,111 | - | - | 0 | None found |
| North Mission Glen MUD · Houston | 9,096 | - | - | 0 | None found |
| Combined Consumers SUD · Quinlan | 9,087 | - | - | 1 | Below limits |
| Harris County Wcid 89 · Houston | 9,033 | - | - | 0 | None found |
| Elderville WSC · Longview | 9,021 | - | - | 0 | None found |
| Naval Air Stn Joint Reserve Base · Fort Woth | 9,000 | - | - | 5 | Below limits |
| City of Pearsall · Pearsall | 8,985 | - | - | 0 | None found |
| Barker Cypress MUD · Houston | 8,976 | - | - | 4 | Below limits |
| Town of Highland Park · Dallas | 8,959 | - | - | 5 | Below limits |
| Olmito WSC · Olmito | 8,952 | - | 1.1 | 5 | Sample at limit |
| Sunbelt Fwsd High Meadows Subdivision · Houston | 8,946 | - | - | 2 | Below limits |
| Spring Creek Utility District · Cypress | 8,919 | - | - | 0 | None found |
| Chelford City MUD · Houston | 8,917 | - | - | 0 | None found |
| Faulkey Gully MUD · Cypress | 8,907 | - | - | 4 | Below limits |
| Creedmoor Maha WSC · Buda | 8,907 | - | - | 5 | Below limits |
| Bacliff MUD · Bacliff | 8,900 | - | - | 3 | Below limits |
| Mason Creek Utility District · Katy | 8,900 | - | - | 0 | None found |
| City of Hillsboro · Hillsboro | 8,867 | 0.2 | - | 6 | Sample at limit |
| Town of Sunnyvale · Sunnyvale | 8,839 | - | - | 4 | Below limits |
| Harris County MUD 391 · Houston | 8,835 | - | - | 0 | None found |
| Walnut Grove WSC · Whitehouse | 8,775 | - | - | 0 | None found |
| City of Wharton · Wharton | 8,756 | - | - | 0 | None found |
| Cross Timbers WSC · Argyle | 8,751 | - | - | 6 | Below limits |
| City of Live Oak · Live Oak | 8,724 | - | - | 0 | None found |
| Galveston County Wcid 12 · Houston | 8,721 | - | - | 4 | Below limits |
| City of Graham · Graham | 8,718 | - | - | 1 | Below limits |
| City of Lago Vista · Lago Vista | 8,698 | - | - | 1 | Below limits |
| Harris County MUD 132 · Houston | 8,682 | - | - | 0 | None found |
| Kingsbridge MUD · Houston | 8,663 | - | - | 4 | Below limits |
| City of Brownfield · Brownfield | 8,652 | - | - | 0 | None found |
| Montgomery County MUD 6 · The Woodlands | 8,610 | - | - | 0 | None found |
| Harris County Wcid 1 · Highlands | 8,559 | - | 0.7 | 6 | Sample at limit |
| Nasa Johnson Space Center · Houston | 8,530 | - | - | 3 | Below limits |
| City of Richland Hills · Richland | 8,521 | - | - | 4 | Below limits |
| Perryton Municipal Water System · Perryton | 8,492 | - | - | 0 | None found |
| Old Egypt Subdivision · Austin | 8,442 | - | - | 0 | None found |
| Copeville SUD · Copeville | 8,438 | - | - | 4 | Below limits |
| Hawley WSC · Hawley | 8,436 | 3.9 | 14.5 | 9 | Above limit |
| Hidalgo County MUD 1 · Mission | 8,420 | - | - | 3 | Below limits |
| Rice University · Houston | 8,415 | - | - | 5 | Below limits |
| Tbcd Winnie Stowell · Stowell | 8,397 | - | - | 1 | Below limits |
| City of Lucas · Lucas | 8,378 | - | - | 4 | Below limits |
| Webb County Water Utilities · Laredo | 8,358 | - | - | 2 | Below limits |
| City of Hitchcock · Hitchcock | 8,346 | - | - | 5 | Below limits |
| Jackrabbit Road PUD · Houston | 8,346 | - | - | 5 | Below limits |
| City of Floresville · Floresville | 8,306 | - | - | 0 | None found |
| Harris County MUD 154 · Houston | 8,289 | - | - | 0 | None found |
| Williamson County Wsid 3 · Austin | 8,265 | - | - | 3 | Below limits |
| Harris County MUD 290 · Houston | 8,259 | - | - | 0 | None found |
| Dalhart Municipal Water System · Dalhart | 8,256 | - | - | 0 | None found |
| North Hopkins WSC · Sulphur Springs | 8,253 | - | - | 0 | None found |
| Orangefield WSC · Orangefield | 8,231 | - | - | 0 | None found |
| Buena Vista Bethel SUD · Waxahachie | 8,218 | - | - | 0 | None found |
| West Harris County MUD 11 · Houston | 8,205 | - | - | 0 | None found |
| Steamboat Mountain WSC · Tuscola | 8,178 | - | - | 3 | Below limits |
| City of Liberty · Liberty | 8,170 | - | - | 0 | None found |
| Bissonnet MUD · Houston | 8,160 | - | - | 0 | None found |
| Bexar County Wcid 10 Windcrest · Windcrest | 8,154 | - | - | 0 | None found |
| Tdcj Beto Unit · Huntsville | 8,148 | - | - | 0 | None found |
| City of Kirby · Kirby | 8,142 | - | - | 0 | None found |
| City of Fort Stockton · Fort Stockton | 8,142 | - | - | 0 | None found |
| City of Gilmer · Gilmer | 8,115 | - | - | 0 | None found |
| City of Aransas Pass · Aransas Pass | 8,088 | - | - | 3 | Below limits |
| Addicks Utility District · Houston | 8,076 | - | - | 5 | Below limits |
| Fort Belknap WSC · Graham | 8,070 | - | - | 1 | Below limits |
| City of Navasota · Navasota | 8,068 | - | - | 0 | None found |
| City of Marble Falls · Marble Falls | 8,059 | - | - | 2 | Below limits |
| Dripping Springs WSC · Dripping Springs | 8,037 | - | - | 0 | None found |
| Gray Utility Service · Austin | 8,004 | - | - | 0 | None found |
| The Woodlands MUD 1 · The Woodlands | 7,989 | - | - | 0 | None found |
| Red River County WSC · Clarksville | 7,989 | - | - | 0 | None found |
| Tdcj Coffield Michael · Huntsville | 7,965 | - | - | 0 | None found |
| Harris County MUD 468 · Houston | 7,944 | - | - | 3 | Below limits |
| Jonestown WSC · Jonestown | 7,902 | - | - | 1 | Below limits |
| City of Giddings · Giddings | 7,878 | - | - | 0 | None found |
| R C H WSC · Rockwall | 7,863 | - | - | 4 | Below limits |
| Northwest Harris County MUD 9 · Houston | 7,848 | - | - | 0 | None found |
| Bell County Wcid 3 · Nolanville | 7,836 | - | - | 3 | Below limits |
| 439 WSC · Belton | 7,836 | - | 1.1 | 7 | Sample at limit |
| City of Pilot Point · Pilot Point | 7,836 | - | - | 0 | None found |
| Sienna Plantation MUD 10 · Houston | 7,824 | - | - | 4 | Below limits |
| First Colony MUD 9 · Houston | 7,818 | - | - | 0 | None found |
| Gum Springs WSC 2 · Hallsville | 7,815 | - | - | 1 | Below limits |
| City of Leon Valley · Leon Valley | 7,794 | - | - | 1 | Below limits |
| City of Jersey Village · Jersey Village | 7,792 | - | - | 5 | Below limits |
| Harris County MUD 238 · The Woodlands | 7,773 | - | - | 3 | Below limits |
| Northwest Harris County MUD 12 · Houston | 7,764 | - | - | 2 | Below limits |
| North Hardin WSC · Silsbee | 7,755 | - | - | 0 | None found |
| City of Crockett · Crockett | 7,755 | - | - | 0 | None found |
| Tbcd West Treatment Plant · Stowell | 7,695 | - | - | 3 | Below limits |
| City of River Oaks · River Oaks | 7,691 | - | - | 1 | Below limits |
| Woodbine WSC · Gainesville | 7,689 | - | - | 4 | Below limits |
| Northwest Harris County MUD 10 · Houston | 7,671 | - | - | 0 | None found |
| City of Kennedale · Kennedale | 7,670 | - | - | 0 | None found |
| Fouke WSC · Mineola | 7,668 | - | - | 0 | None found |
| Weston MUD · Houston | 7,647 | - | - | 0 | None found |
| Montgomery County MUD 18 · Montgomery | 7,608 | - | - | 2 | Below limits |
| City of Richwood · Richwood | 7,605 | - | - | 6 | Below limits |
| Zephyr WSC · Zephyr | 7,575 | - | - | 2 | Below limits |
| Macbee SUD · Wills Point | 7,548 | - | 1.3 | 2 | Sample at limit |
| Blue Ridge West MUD · Houston | 7,545 | - | - | 1 | Below limits |
| City of Justin · Justin | 7,537 | - | - | 4 | Below limits |
| Harris County MUD 151 · Houston | 7,464 | - | - | 0 | None found |
| City of Mexia · Mexia | 7,459 | - | - | 0 | None found |
| Cy Champ PUD · Houston | 7,428 | - | - | 1 | Below limits |
| Potosi WSC · Abilene | 7,413 | 4.5 | 18.1 | 8 | Above limit |
| Possum Kingdom WSC · Graford | 7,395 | - | - | 0 | None found |
| Harris County MUD 419 · Houston | 7,389 | - | - | 3 | Below limits |
| City of Seminole · Seminole | 7,386 | - | - | 0 | None found |
| Central Wcid of Angelina County · Pollok | 7,381 | - | - | 0 | None found |
| Sienna Plantation MUD 3 · Houston | 7,365 | - | - | 4 | Below limits |
| City of Luling · Luling | 7,364 | - | - | 0 | None found |
| Fort Bend County MUD 133 · Houston | 7,362 | - | 1.1 | 6 | Sample at limit |
| City of Alamo Heights · San Antonio | 7,357 | - | - | 0 | None found |
| Fort Bend County MUD 134b · Houston | 7,356 | - | - | 3 | Below limits |
| Emerald Forest Utility District · Houston | 7,326 | - | - | 2 | Below limits |
| Parkway Utility District · Houston | 7,323 | - | - | 4 | Below limits |
| Diana SUD · Diana | 7,320 | - | - | 1 | Below limits |
| Harris County MUD 152 · Houston | 7,314 | - | - | 0 | None found |
| City of Wilmer · Wilmer | 7,296 | - | - | 4 | Below limits |
| City of Lampasas · Lampasas | 7,291 | - | - | 3 | Below limits |
| City of Wills Point · Wills Point | 7,281 | - | - | 4 | Below limits |
| D & M WSC · Douglass | 7,280 | - | - | 0 | None found |
| City of Lacy Lakeview · Lacy Lakeview | 7,275 | - | - | 1 | Below limits |
| Bastrop County Wcid 2 · Bastrop | 7,269 | - | - | 1 | Below limits |
| Fort Bend County MUD 134c · Houston | 7,260 | - | - | 3 | Below limits |
| Fort Bend County MUD 143 Water View Esta · Houston | 7,245 | - | - | 2 | Below limits |
| Malcomson Road Utility District · Houston | 7,231 | - | - | 3 | Below limits |
| City of La Feria · La Feria | 7,226 | - | 1.0 | 4 | Sample at limit |
| Dyess Air Force Base · Dyess Afb | 7,183 | 5.6 | 17.9 | 8 | Above limit |
| Windfern Forest Utility District · Houston | 7,170 | - | - | 3 | Below limits |
| City of Hempstead · Hempstead | 7,158 | - | - | 0 | None found |
| Town of Providence Village · Forney | 7,128 | - | - | 0 | None found |
| City of Crystal City · Crystal City | 7,128 | - | - | 0 | None found |
| City of Kaufman · Kaufman | 7,125 | - | - | 1 | Below limits |
| Lake Forest Utility District · Houston | 7,106 | - | - | 3 | Below limits |
| Nottingham Country MUD · Houston | 7,089 | - | - | 0 | None found |
| Montgomery County Wcid 1 · The Woodlands | 7,070 | - | - | 0 | None found |
| Galveston County Wcid 8 · Santa Fe | 7,065 | - | - | 5 | Below limits |
| Plum Creek · Austin | 7,065 | - | - | 0 | None found |
| Corpus Christi Naval Air Station · Corpus Christi | 7,048 | - | - | 1 | Below limits |
| Harris County MUD 196 · Houston | 7,026 | - | - | 5 | Below limits |
| City of Burnet · Burnet | 7,011 | - | - | 3 | Below limits |
| Dowdell PUD · Houston | 7,002 | - | - | 0 | None found |
| City of Van Alstyne · Van Alstyne | 7,000 | - | - | 1 | Below limits |
| Exxon Mobil Baytown Refinery · Baytown | 7,000 | - | - | 5 | Below limits |
| Harris County MUD 96 · Houston | 6,993 | - | - | 0 | None found |
| Sagemeadow Utility District · Houston | 6,975 | - | - | 5 | Below limits |
| Pine Trails Utility · Austin | 6,969 | - | - | 6 | Below limits |
| Reid Road MUD 1 · Houston | 6,969 | - | - | 0 | None found |
| City of Monahans · Monahans | 6,953 | - | - | 0 | None found |
| North Cherokee WSC · Jacksonville | 6,951 | - | - | 1 | Below limits |
| Rio WSC · Rio Grande City | 6,939 | - | - | 1 | Below limits |
| Brazoria County MUD 6 · Houston | 6,926 | - | - | 0 | None found |
| West Harris County MUD 2 Chase · Houston | 6,921 | - | - | 0 | None found |
| Northwest Harris County MUD 15 · Houston | 6,915 | - | - | 0 | None found |
| City of Decatur · Decatur | 6,910 | - | - | 1 | Below limits |
| Harris County MUD 189 · Houston | 6,906 | - | - | 0 | None found |
| Bell Milam Falls WSC · Cameron | 6,885 | - | - | 1 | Below limits |
| City of New Boston · New Boston | 6,880 | - | - | 1 | Below limits |
| City of Keene · Keene | 6,863 | - | - | 1 | Below limits |
| City of Sealy · Sealy | 6,839 | - | - | 0 | None found |
| Fort Bend County MUD 2 · Houston | 6,819 | - | - | 3 | Below limits |
| Sunbelt Fwsd Oakwilde Subdivision · Houston | 6,819 | - | - | 2 | Below limits |
| Two Way SUD · Whitesboro | 6,804 | - | - | 1 | Below limits |
| Harris County MUD 158 · Houston | 6,798 | - | - | 0 | None found |
| City of Granite Shoals · Granite Shoals | 6,795 | - | - | 1 | Below limits |
| Harris County MUD 150 · Houston | 6,786 | - | - | 3 | Below limits |
| City of Carthage · Carthage | 6,770 | - | - | 0 | None found |
| Harris County MUD 367 · Houston | 6,759 | - | - | 3 | Below limits |
| East Cedar Creek Fwsd B a Mckay · Mabank | 6,753 | - | - | 1 | Below limits |
| South Grayson SUD · Van Alstyne | 6,750 | - | - | 1 | Below limits |
| Bright Star-salem SUD · Alba | 6,738 | - | - | 1 | Below limits |
| Harris County MUD 64 · Houston | 6,726 | - | - | 0 | None found |
| Fallbrook Utility District · Houston | 6,720 | - | - | 1 | Below limits |
| Mills Road MUD · Houston | 6,717 | - | - | 1 | Below limits |
| North Park PUD · Houston | 6,708 | - | - | 0 | None found |
| West Harris County MUD 10 · Houston | 6,697 | - | - | 0 | None found |
| Four Way SUD · Huntington | 6,684 | - | - | 1 | Below limits |
| Harris County MUD 118 · Houston | 6,678 | - | - | 0 | None found |
| Grand Mission MUD 1 · Houston | 6,663 | - | - | 3 | Below limits |
| Montgomery County MUD 119 Spring Trails · Houston | 6,621 | - | - | 0 | None found |
| Block House MUD · Leander | 6,618 | - | - | 1 | Below limits |
| Memorial MUD · Sugar Land | 6,615 | - | - | 0 | None found |
| City of Alvarado · Alvarado | 6,614 | - | - | 3 | Below limits |
| Heatherloch MUD · Houston | 6,612 | - | - | 5 | Below limits |
| City of Iowa Park · Iowa Park | 6,612 | - | - | 2 | Below limits |
| Horsepen Bayou MUD · Houston | 6,597 | - | - | 4 | Below limits |
| Interstate MUD · Houston | 6,591 | - | - | 5 | Below limits |
| Harris County MUD 354 · Houston | 6,588 | - | - | 0 | None found |
| Montgomery County MUD 15 · Houston | 6,564 | - | - | 2 | Below limits |
| Harris County Wcid 84 · Houston | 6,552 | - | - | 1 | Below limits |
| Mission Bend MUD 1 · Houston | 6,546 | - | - | 0 | None found |
| Chatfield WSC · Powell | 6,546 | - | - | 4 | Below limits |
| Liberty City WSC · Kilgore | 6,540 | - | - | 0 | None found |
| Wichita Valley WSC · Holliday | 6,516 | - | - | 3 | Below limits |
| Md Anderson Cancer Center Alkek · Houston | 6,500 | - | - | 3 | Below limits |
| City of Parker · Parker | 6,486 | - | - | 4 | Below limits |
| City of White Oak · White Oak | 6,469 | - | - | 0 | None found |
| Kaufman County MUD 14 · Dallas | 6,456 | - | - | 4 | Below limits |
| City of Kenedy · Kenedy | 6,454 | - | - | 0 | None found |
| Big Oaks MUD · Houston | 6,450 | - | 1.1 | 6 | Sample at limit |
| City of Gladewater · Gladewater | 6,441 | - | - | 0 | None found |
| Harris County MUD 65 · Houston | 6,330 | - | - | 0 | None found |
| B H P WSC · Royse City | 6,321 | - | - | 4 | Below limits |
| City of Lindale · Lindale | 6,313 | - | - | 0 | None found |
| Parker County SUD Surface · Millsap | 6,300 | - | - | 1 | Below limits |
| Fort Bend County MUD 35 · Houston | 6,297 | - | - | 3 | Below limits |
| San Diego MUD 1 · San Diego | 6,291 | - | - | 0 | None found |
| El Oso WSC · Karnes City | 6,288 | - | - | 0 | None found |
| City of Everman · Everman | 6,279 | - | - | 0 | None found |
| Riverside SUD · Riverside | 6,246 | - | - | 2 | Below limits |
| Fort Bend County MUD 50 · Houston | 6,234 | - | - | 2 | Below limits |
| Oak Hills WSC · Floresville | 6,225 | - | - | 0 | None found |
| Cinco MUD 14 · Houston | 6,192 | - | - | 0 | None found |
| Blackland WSC · Fate | 6,171 | - | - | 4 | Below limits |
| Harris County MUD 364 · Houston | 6,168 | - | - | 0 | None found |
| Leigh Wsc-rural · Scottsville | 6,164 | - | - | 0 | None found |
| East Medina County SUD Unit 1 · Devine | 6,153 | - | - | 0 | None found |
| Hardin WSC · Hardin | 6,132 | - | - | 0 | None found |
| Harris County MUD 222 · Houston | 6,129 | - | - | 0 | None found |
| City of Madisonville · Madisonville | 6,111 | - | - | 0 | None found |
| City of Childress · Childress | 6,105 | - | 1.2 | 4 | Sample at limit |
| City of Houston District 73 · Houston | 6,105 | - | - | 0 | None found |
| Cinco Southwest MUD 4 · Houston | 6,093 | - | - | 0 | None found |
| Jones WSC · Quitman | 6,075 | - | - | 0 | None found |
| Harris County UD 16 · Houston | 6,069 | - | - | 0 | None found |
| City of Woodville · Woodville | 6,069 | - | - | 0 | None found |
| City of Krum · Krum | 6,062 | - | - | 0 | None found |
| Lake MUD · Houston | 6,048 | - | - | 4 | Below limits |
| Coryell City Water Supply District · Gatesville | 6,042 | - | - | 1 | Below limits |
| City of Mcgregor · Mc Gregor | 6,037 | - | - | 1 | Below limits |
| City of Los Fresnos · Los Fresnos | 6,009 | - | - | 0 | None found |
| City of Alpine · Alpine | 6,000 | - | - | 0 | None found |
| Town of Cut and Shoot · Cut and Shoot | 6,000 | - | - | 0 | None found |
| City of Edna · Edna | 5,987 | - | - | 0 | None found |
| Fort Bend County MUD 146 · Houston | 5,985 | - | - | 5 | Below limits |
| Harris County MUD 16 · Houston | 5,982 | - | - | 2 | Below limits |
| City of Marlin · Marlin | 5,967 | - | - | 1 | Below limits |
| West Harris County MUD 9 · Houston | 5,961 | - | - | 0 | None found |
| Katy Isd Mayde Creek School Complex · Katy | 5,960 | - | - | 0 | None found |
| Ingram Water Supply · Austin | 5,955 | - | - | 0 | None found |
| Montgomery County MUD 9 · Houston | 5,949 | - | - | 0 | None found |
| City of Pearland MUD 1 · Pearland | 5,947 | - | - | 0 | None found |
| City of Wake Village · Wake Village | 5,945 | - | - | 1 | Below limits |
| City of Littlefield · Littlefield | 5,943 | - | - | 0 | None found |
| Prestonwood Forest Utility District · Houston | 5,940 | - | - | 3 | Below limits |
| Harris County MUD 43 · Spring | 5,940 | - | - | 0 | None found |
| City of Bridgeport · Bridgeport | 5,930 | - | - | 1 | Below limits |
| Dean WSC · Tyler | 5,907 | - | - | 0 | None found |
| City of Hutchins · Hutchins | 5,902 | - | - | 4 | Below limits |
| Brazoria County MUD 29 · Houston | 5,898 | - | - | 0 | None found |
| Harris County MUD 180 · Houston | 5,892 | - | - | 0 | None found |
| Benders Landing Water Plant 1 & 2 · Magnolia | 5,892 | - | - | 0 | None found |
| Harris County Wcid 74 · Houston | 5,886 | - | - | 0 | None found |
| Tyler County SUD · Spurger | 5,872 | - | - | 1 | Below limits |
| Western Cass WSC · Linden | 5,871 | - | - | 0 | None found |
| City of Slaton · Slaton | 5,858 | - | - | 1 | Below limits |
| Charterwood MUD · Houston | 5,832 | - | - | 1 | Below limits |
| City of Carrizo Springs · Carrizo Springs | 5,830 | - | - | 0 | None found |
| City of Yoakum · Yoakum | 5,814 | - | - | 0 | None found |
| City of Primera · Harlingen | 5,811 | - | - | 5 | Below limits |
| City of Breckenridge · Breckenridge | 5,807 | - | - | 1 | Below limits |
| Frisco West Wcid · Dallas | 5,805 | - | - | 4 | Below limits |
| Fayette WSC West · La Grange | 5,802 | - | - | 0 | None found |
| Union WSC · Garciasville | 5,793 | - | - | 3 | Below limits |
| Williamson Travis County MUD 1 · Cedar Park | 5,793 | - | - | 0 | None found |
| Harris County MUD 70 · Houston | 5,763 | - | - | 5 | Below limits |
| Federal Correctional Complex-beaumont · Beaumont | 5,748 | - | - | 0 | None found |
| Appleby WSC · Nacogdoches | 5,745 | - | - | 0 | None found |
| Travis County Wcid 18 · Austin | 5,733 | - | - | 2 | Below limits |
| City of Jourdanton · Jourdanton | 5,721 | - | - | 0 | None found |
| City of Kermit · Kermit | 5,708 | - | - | 0 | None found |
| Village of Surfside Beach · Surfside Beach | 5,697 | - | - | 1 | Below limits |
| City of Teague · Teague | 5,688 | - | - | 0 | None found |
| Fern Bluff MUD · Round Rock | 5,682 | - | - | 2 | Below limits |
| Oak Trail Shores · Austin | 5,676 | - | - | 2 | Below limits |
| Lake Livingston Pineshadows East · Livingston | 5,675 | - | - | 3 | Below limits |
| Tdcj Chase Field · Huntsville | 5,669 | - | - | 0 | None found |
| Ables Springs SUD · Terrell | 5,655 | - | - | 1 | Below limits |
| City of Cotulla · Cotulla | 5,640 | - | - | 0 | None found |
| Fritch Municipal Water Supply · Fritch | 5,636 | - | - | 0 | None found |
| Cinco MUD 8 · Houston | 5,613 | - | - | 0 | None found |
| Spencer Road PUD · Houston | 5,607 | - | 1.2 | 7 | Sample at limit |
| City of Rusk · Rusk | 5,602 | - | - | 0 | None found |
| Harris County MUD 239 · Houston | 5,583 | - | - | 0 | None found |
| City of Hallsville · Hallsville | 5,580 | - | - | 1 | Below limits |
| Craft Turney WSC Main · Jacksonville | 5,577 | - | - | 0 | None found |
| Town of Anthony · Anthony | 5,555 | 4.9 | 5.5 | 7 | Above limit |
| City of Bowie · Bowie | 5,534 | - | - | 1 | Below limits |
| Jackson WSC · Tyler | 5,532 | - | - | 0 | None found |
| Harris County MUD 374 Cypress Creek Lake · Houston | 5,526 | - | - | 3 | Below limits |
| City of Aledo · Aledo | 5,521 | - | - | 3 | Below limits |
| City of Presidio · Presidio | 5,514 | - | - | 0 | None found |
| City of Sinton · Sinton | 5,505 | - | - | 0 | None found |
| City of Elsa · Elsa | 5,500 | - | - | 2 | Below limits |
| City of Denver City · Denver City | 5,500 | - | - | 0 | None found |
| Cinco Southwest MUD 2 · Houston | 5,496 | - | - | 3 | Below limits |
| City of Cameron · Cameron | 5,489 | 2.2 | 1.1 | 10 | Sample at limit |
| Harris County MUD 5 · Houston | 5,487 | - | - | 0 | None found |
| Harris County MUD 163 · Houston | 5,487 | - | - | 4 | Below limits |
| Montgomery County MUD 8 · Houston | 5,472 | - | - | 0 | None found |
| City of Post · Post | 5,471 | - | - | 1 | Below limits |
| City of Rockdale · Rockdale | 5,460 | - | - | 0 | None found |
| Montgomery County MUD 112 · Houston | 5,454 | - | - | 0 | None found |
| City of Center · Center | 5,450 | - | - | 0 | None found |
| Harris County MUD 148 Kingslake · Houston | 5,448 | - | - | 4 | Below limits |
| City of Waller · Waller | 5,448 | - | - | 0 | None found |
| Fort Bend County MUD 26 Quail Green West · Houston | 5,424 | - | - | 0 | None found |
| City of Atlanta · Atlanta | 5,418 | - | - | 0 | None found |
| Harris County MUD 46 · Houston | 5,418 | - | - | 0 | None found |
| Chimney Hill MUD · Houston | 5,409 | - | - | 3 | Below limits |
| Tattor Road MUD · Houston | 5,400 | - | - | 0 | None found |
| Bilma PUD · Houston | 5,397 | - | - | 4 | Below limits |
| Harris County MUD 86 · Houston | 5,397 | - | - | 2 | Below limits |
| Jim Hogg County Wcid 2 · Hebbronville | 5,397 | - | - | 0 | None found |
| Hickory Creek SUD · Celeste | 5,373 | - | - | 0 | None found |
| City of Brady Water System · Brady | 5,371 | - | - | 0 | None found |
| Fort Bend County MUD 34 · Houston | 5,367 | - | - | 4 | Below limits |
| Southwest Isd Main · San Antonio | 5,364 | - | - | 0 | None found |
| Brookshire Mwd · Brookshire | 5,364 | - | - | 0 | None found |
| City of Sansom Park · Fort Worth | 5,359 | - | - | 0 | None found |
| Tri County SUD · Marlin | 5,353 | - | - | 0 | None found |
| City of Nassau Bay · Nassau Bay | 5,347 | - | - | 4 | Below limits |
| Fort Bend County MUD 118 · Houston | 5,346 | - | - | 5 | Below limits |
| Mount Houston Road MUD · Houston | 5,346 | - | - | 0 | None found |
| Westador MUD · Houston | 5,337 | - | - | 0 | None found |
| Fort Bend County MUD 57 · Houston | 5,335 | - | - | 3 | Below limits |
| Wimberley WSC · Wimberley | 5,334 | - | - | 0 | None found |
| Cornerstones MUD · Houston | 5,331 | - | - | 0 | None found |
| City of Farmersville · Farmersville | 5,312 | - | - | 1 | Below limits |
| Brazoria County MUD 22 · Houston | 5,310 | - | - | 0 | None found |
| Mayde Creek MUD · Houston | 5,301 | - | - | 3 | Below limits |
| West Harris County MUD 7 · Houston | 5,289 | - | - | 0 | None found |
| Onalaska WSC · Onalaska | 5,289 | - | - | 0 | None found |
| Tarkington SUD · Cleveland | 5,265 | - | - | 0 | None found |
| Flo Community WSC · Buffalo | 5,256 | - | - | 0 | None found |
| Brazoria County MUD 25 · Houston | 5,250 | - | - | 0 | None found |
| Harris County MUD 127 · Houston | 5,247 | - | - | 2 | Below limits |
| Goodfellow Air Force Base · Goodfellow Afb | 5,241 | - | - | 3 | Below limits |
| Ramey WSC · Mineola | 5,238 | - | - | 0 | None found |
| Montgomery County MUD 36 · The Woodlands | 5,235 | - | - | 0 | None found |
| Harris County MUD 400 - West · Houston | 5,217 | - | - | 0 | None found |
| City of Diboll · Diboll | 5,207 | - | - | 0 | None found |
| South Tawakoni WSC · Wills Point | 5,205 | - | 1.8 | 4 | Sample at limit |
| Cinco Southwest MUD 3 Daycare · Houston | 5,187 | - | - | 1 | Below limits |
| Montgomery County MUD 94 · Houston | 5,184 | - | - | 0 | None found |
| Harris County MUD 33 · Houston | 5,181 | - | - | 0 | None found |
| Denton County Fwsd 11-a Paloma · Houston | 5,160 | - | - | 1 | Below limits |
| Harris County Wcid 114 · Houston | 5,160 | - | - | 3 | Below limits |
| Muleshoe Municipal Water System · Muleshoe | 5,158 | - | - | 0 | None found |
| West Gregg SUD · Kilgore | 5,127 | - | - | 0 | None found |
| Tdcj Ramsey Area · Huntsville | 5,119 | - | - | 0 | None found |
| Harris County MUD 179 · Houston | 5,115 | - | - | 4 | Below limits |
| City of Garden Ridge · Garden Ridge | 5,100 | - | - | 0 | None found |
| Harris County MUD 276 · Houston | 5,094 | - | - | 3 | Below limits |
| Fort Bend County MUD 119 · Houston | 5,088 | - | - | 1 | Below limits |
| Harris County Wcid 133 · Houston | 5,082 | - | - | 0 | None found |
| Lake Fork WSC · Yantis | 5,082 | - | - | 0 | None found |
| Sunko WSC · Stockdale | 5,064 | - | - | 0 | None found |
| Denton County Fwsd 10 Artesia · Savannah | 5,061 | - | - | 1 | Below limits |
| Concho Rural Water Grape Creek · San Angelo | 5,049 | - | - | 3 | Below limits |
| Rincon WSC · Taft | 5,034 | - | - | 2 | Below limits |
| City of Canton · Canton | 5,028 | - | - | 1 | Below limits |
| Harris County Improvement District 18 · Houston | 5,025 | - | - | 0 | None found |
| Northwest Harris County MUD 32 · Houston | 5,016 | - | - | 0 | None found |
| Harris County MUD 495 · Houston | 5,007 | - | - | 0 | None found |
| City of Mathis · Mathis | 5,001 | - | - | 2 | Below limits |
| City of Morgans Point Resort · Morgans Point Resort | 5,000 | - | - | 5 | Below limits |
| Coleman County SUD · Coleman | 5,000 | - | - | 1 | Below limits |
| City of Meadows Place · Meadows Place | 5,000 | - | - | 0 | None found |
| Montgomery County UD 4 · Houston | 4,980 | - | - | 0 | None found |
| City of La Grange · La Grange | 4,973 | - | - | 1 | Below limits |
| City of Hearne · Hearne | 4,959 | - | - | 0 | None found |
| Tulia Municipal Water System · Tulia | 4,951 | - | - | 0 | None found |
| Conroe Isd Moorehead Jr High School · Conroe | 4,945 | - | - | 0 | None found |
| North Green MUD · Houston | 4,941 | - | - | 0 | None found |
| City of Taft · Taft | 4,941 | - | - | 2 | Below limits |
| City of Willow Park · Willow Park | 4,936 | - | - | 0 | None found |
| Ricewood MUD · Houston | 4,908 | - | - | 0 | None found |
| City of Smithville · Smithville | 4,901 | - | - | 0 | None found |
| Harris County MUD 383 · Houston | 4,881 | - | - | 3 | Below limits |
| Brushy Creek WSC · Montalba | 4,866 | - | - | 0 | None found |
| City of Lytle · Lytle | 4,860 | - | - | 0 | None found |
| Harris County MUD 104 · Houston | 4,854 | - | - | 2 | Below limits |
| Louetta North PUD · Houston | 4,848 | - | - | 3 | Below limits |
| Sienna Plantation MUD 2 · Missouri City | 4,847 | - | - | 2 | Below limits |
| Wickson Creek SUD Grimes County · Bryan | 4,843 | - | - | 1 | Below limits |
| West Bell County WSC · Killeen | 4,842 | - | 1.5 | 7 | Sample at limit |
| Harris County MUD 221 · Houston | 4,839 | - | - | 0 | None found |
| North Hunt SUD · Commerce | 4,836 | - | - | 0 | None found |
| Brazoria County MUD 21 · Houston | 4,833 | - | - | 0 | None found |
| Fort Bend County MUD 116 Canyon Gate · Houston | 4,833 | - | - | 0 | None found |
| Chalk Hill SUD · Henderson | 4,830 | - | - | 0 | None found |
| Rose Hill SUD · Terrell | 4,827 | - | - | 1 | Below limits |
| Golden WSC · Golden | 4,821 | - | - | 0 | None found |
| Files Valley WSC · Itasca | 4,776 | - | - | 2 | Below limits |
| Dobbin Plantersville WSC 1 · Plantersville | 4,767 | - | - | 0 | None found |
| Montgomery County MUD 89 · Houston | 4,761 | - | - | 0 | None found |
| Harris County MUD 119 · Houston | 4,758 | 1.0 | - | 1 | Sample at limit |
| Harris County Wcid 92 · Houston | 4,752 | - | - | 0 | None found |
| Cinco MUD 2 · Houston | 4,743 | - | - | 0 | None found |
| Harris County MUD 50 · Crosby | 4,743 | - | - | 0 | None found |
| City of Lake Worth · Lake Worth | 4,720 | - | 1.1 | 7 | Sample at limit |
| Fort Bend County MUD 129 · Sugar Land | 4,713 | - | - | 1 | Below limits |
| Harris County MUD 360 · Houston | 4,707 | - | - | 0 | None found |
| City of Palacios · Palacios | 4,700 | - | - | 0 | None found |
| Harris County MUD 106 · Houston | 4,668 | - | - | 0 | None found |
| Reid Road MUD 2 · The Woodlands | 4,662 | - | - | 0 | None found |
| Friona Municipal Water System · Friona | 4,653 | - | - | 0 | None found |
| Harris Fort Bend Counties MUD 5 · Houston | 4,641 | - | - | 0 | None found |
| West Hardin WSC · Saratoga | 4,630 | - | - | 0 | None found |
| Community WSC · Azle | 4,629 | - | - | 1 | Below limits |
| Elm Creek WSC · Moody | 4,620 | - | - | 0 | None found |
| Harris County MUD 185 · Houston | 4,617 | - | - | 6 | Below limits |
| Fountainhead MUD · Houston | 4,614 | - | - | 3 | Below limits |
| Jefferson County Wcid 10 · Nederland | 4,605 | - | - | 1 | Below limits |
| Us Department of Energy Pantex Plant · Amarillo | 4,600 | - | - | 0 | None found |
| Sunbelt Fwsd Woodland Oaks Subdivision · Houston | 4,578 | - | - | 2 | Below limits |
| Harris County MUD 130 · Houston | 4,572 | - | - | 4 | Below limits |
| Sand Flat WSC · Tyler | 4,569 | - | - | 0 | None found |
| Chelford One MUD · Houston | 4,557 | - | - | 0 | None found |
| City of Ovilla · Ovilla | 4,532 | - | - | 4 | Below limits |
| City of Mineola · Mineola | 4,515 | - | - | 0 | None found |
| City of Dilley · Dilley | 4,505 | - | - | 0 | None found |
| Bethany SUD · Alvarado | 4,503 | - | - | 1 | Below limits |
| City of Bullard · Bullard | 4,500 | - | - | 0 | None found |
| Gbra Calhoun County Rural Water System · Cypress | 4,482 | 1.1 | 0.6 | 8 | Sample at limit |
| Falfurrias Utility Board · Falfurrias | 4,473 | - | - | 0 | None found |
| Northwest Harris County MUD 23 · Houston | 4,470 | - | - | 0 | None found |
| Renn Road MUD · Houston | 4,464 | - | - | 0 | None found |
| Harris County MUD 365 · Houston | 4,461 | - | - | 0 | None found |
| Harris County MUD 370 · Houston | 4,452 | - | - | 3 | Below limits |
| Clay Road MUD · Houston | 4,443 | - | - | 3 | Below limits |
| City of Three Rivers · Three Rivers | 4,428 | - | - | 1 | Below limits |
| Harris County MUD 69 · Houston | 4,422 | - | - | 0 | None found |
| Montgomery County MUD 19 · Houston | 4,422 | - | - | 0 | None found |
| Harris County MUD 397 · Houston | 4,413 | - | - | 0 | None found |
| Harris County MUD 172 · Houston | 4,404 | - | - | 4 | Below limits |
| City of Jacksboro · Jacksboro | 4,397 | - | - | 2 | Below limits |
| Fort Bend County MUD 42 Wat Plat · Houston | 4,395 | - | - | 0 | None found |
| Dimmitt Municipal Water System · Dimmitt | 4,393 | - | - | 0 | None found |
| Hill County WSC · Whitney | 4,383 | - | - | 3 | Below limits |
| Kings Manor MUD · Houston | 4,377 | - | - | 0 | None found |
| City of Caldwell · Caldwell | 4,358 | - | - | 0 | None found |
| City of Redwater · Redwater | 4,356 | - | - | 0 | None found |
| Texas A&m University Commerce · Commerce | 4,350 | - | - | 0 | None found |
| Tanglewood on Texoma · Austin | 4,341 | - | - | 6 | Above limit |
| City of Pittsburg · Pittsburg | 4,335 | - | - | 0 | None found |
| City of Devine · Devine | 4,335 | - | - | 0 | None found |
| Fort Bend County MUD 165 · Houston | 4,314 | - | 1.1 | 5 | Sample at limit |
| Milano WSC · Milano | 4,308 | - | - | 1 | Below limits |
| Cypresswood Utility District · Houston | 4,305 | - | - | 3 | Below limits |
| Virginia Hill WSC · Athens | 4,290 | - | - | 0 | None found |
| East Bell WSC · Temple | 4,287 | - | - | 5 | Below limits |
| Montgomery County MUD 39 · The Woodlands | 4,284 | - | - | 0 | None found |
| City of Sugar Land River Park · Sugar Land | 4,278 | - | - | 0 | None found |
| City of Karnes City · Karnes City | 4,269 | - | - | 0 | None found |
| Harris County MUD 322 Fairfield Village · Houston | 4,266 | - | - | 0 | None found |
| Plantation MUD · Houston | 4,260 | - | - | 0 | None found |
| Harris County Fwsd 47 · Channelview | 4,250 | - | - | 3 | Below limits |
| City of Groesbeck · Groesbeck | 4,250 | - | - | 1 | Below limits |
| Williamson County MUD 11 · Austin | 4,248 | - | - | 2 | Below limits |
| Cinco MUD 7 · Houston | 4,239 | - | - | 0 | None found |
| Brazoria County MUD 3 · Houston | 4,230 | - | - | 0 | None found |
| City of Spring Valley Village · Houston | 4,229 | - | - | 0 | None found |
| Walston Springs WSC · Palestine | 4,221 | - | - | 0 | None found |
| City of Elmendorf · Elmendorf | 4,221 | - | - | 0 | None found |
| Nevada SUD · Nevada | 4,218 | - | - | 4 | Below limits |
| City of Comanche · Comanche | 4,211 | - | - | 1 | Below limits |
| City of Bellville · Bellville | 4,206 | - | - | 0 | None found |
| Thunderbird Utility District 1 · Missouri City | 4,203 | - | - | 0 | None found |
| Luella SUD · Sherman | 4,200 | - | - | 0 | None found |
| Spring Meadows MUD · Houston | 4,200 | - | - | 4 | Below limits |
| City of Whitesboro · Whitesboro | 4,192 | - | - | 0 | None found |
| Moffat WSC · Temple | 4,182 | - | - | 0 | None found |
| West Memorial MUD · The Woodlands | 4,182 | - | - | 0 | None found |
| Fort Bend County MUD 41 · Houston | 4,179 | - | 1.0 | 7 | Sample at limit |
| Harris County MUD 304 · The Woodlands | 4,158 | - | - | 0 | None found |
| Fort Bend County MUD 123 · Houston | 4,143 | - | - | 3 | Below limits |
| Fort Bend County MUD 81 Weston Lakes · Houston | 4,107 | - | - | 0 | None found |
| Harleton WSC · Harleton | 4,107 | - | - | 5 | Below limits |
| Dog Ridge WSC · Belton | 4,100 | - | - | 0 | None found |
| Champions MUD · Houston | 4,098 | - | - | 4 | Below limits |
| Martin Springs WSC · Como | 4,095 | - | - | 0 | None found |
| Harris County MUD 18 Heatherwood Hunters · Houston | 4,083 | - | - | 2 | Below limits |
| City of Cisco · Cisco | 4,076 | - | - | 2 | Below limits |
| Orange County Wcid 2 · Orange | 4,074 | - | - | 0 | None found |
| Valley Ranch MUD 1 · Houston | 4,056 | - | - | 0 | None found |
| Hays Consolidated Isd Jack C Hays High S · Kyle | 4,048 | - | - | 0 | None found |
| M E N WSC · Corsicana | 4,040 | - | - | 3 | Below limits |
| Harris County MUD 342 · Houston | 4,035 | - | - | 0 | None found |
| Laughlin Air Force Base · Laughlin Afb | 4,010 | - | - | 0 | None found |
| Harris County MUD 186 · Houston | 4,005 | - | - | 4 | Below limits |
| Aldine Isd Grace Raymond Elementary Scho · Houston | 4,000 | - | - | 0 | None found |
| City of Coleman · Coleman | 3,998 | - | - | 1 | Below limits |
| San Jacinto SUD · Coldspring | 3,993 | - | - | 1 | Below limits |
| City of Colorado City · Colorado City | 3,991 | - | - | 0 | None found |
| Millersview-doole WSC · Millersview | 3,987 | - | - | 4 | Below limits |
| Harris County MUD 183 · Houston | 3,981 | - | - | 4 | Below limits |
| City of Sweeny · Sweeny | 3,978 | - | - | 0 | None found |
| Fort Bend County MUD 48 · Houston | 3,969 | - | - | 0 | None found |
| Cypress Klein Utility District Wimbleton · Houston | 3,960 | - | - | 0 | None found |
| Lamar Cisd Foster Briscoe and Wertheimer · Rosenberg | 3,950 | - | - | 0 | None found |
| Cross Country WSC · China Spring | 3,939 | - | - | 0 | None found |
| Harris County MUD 6 Carriage Lane · Houston | 3,936 | - | - | 5 | Below limits |
| Southern Water · Houston | 3,933 | - | - | 0 | None found |
| Eula WSC · Clyde | 3,918 | 1.6 | 6.3 | 8 | Above limit |
| Cypress Forest PUD · Houston | 3,912 | - | - | 3 | Below limits |
| Westlake MUD 1 · Houston | 3,909 | - | - | 0 | None found |
| West Wise SUD · Bridgeport | 3,909 | - | - | 1 | Below limits |
| Northgate Crossing MUD 1 · Houston | 3,906 | - | - | 0 | None found |
| Carolynn Estates · Austin | 3,906 | - | - | 3 | Below limits |
| Harris County MUD 173 · Houston | 3,894 | - | - | 3 | Below limits |
| Crystal Systems · Cypress | 3,879 | - | - | 0 | None found |
| The Consolidated WSC Central System · Crockett | 3,878 | - | - | 1 | Below limits |
| City of Cockrell Hill · Dallas | 3,855 | 1.3 | 1.0 | 8 | Sample at limit |
| Harris County MUD 345 · Houston | 3,855 | - | - | 0 | None found |
| Chalk Bluff WSC · Waco | 3,852 | - | - | 0 | None found |
| Navarro Mills WSC · Purdon | 3,852 | - | - | 1 | Below limits |
| City of Eagle Lake · Eagle Lake | 3,837 | - | - | 0 | None found |
| Cinco MUD 9 · Houston | 3,828 | - | - | 0 | None found |
| Montgomery County UD 3 · Houston | 3,825 | - | - | 0 | None found |
| City of Clyde · Clyde | 3,820 | 1.4 | 5.8 | 9 | Above limit |
| Kaufman County MUD 11 · Dallas | 3,819 | - | - | 4 | Below limits |
| City of Nash · Nash | 3,818 | - | - | 1 | Below limits |
| City of Venus · Venus | 3,816 | - | - | 3 | Below limits |
| Harris Fort Bend Counties MUD 1 · Houston | 3,812 | - | - | 0 | None found |
| Crockett County Wcid 1 Ozona · Ozona | 3,800 | - | - | 0 | None found |
| Stanley Lake MUD · Montgomery | 3,783 | - | - | 0 | None found |
| City of Springtown · Springtown | 3,781 | - | - | 1 | Below limits |
| Decker Hills · Austin | 3,780 | - | - | 0 | None found |
| City of Bunker Hill Village · Houston | 3,771 | - | - | 3 | Below limits |
| City of Emory · Emory | 3,762 | - | - | 4 | Below limits |
| South Freestone County WSC · Teague | 3,753 | - | - | 0 | None found |
| Northgate Crossing MUD 2 · Houston | 3,753 | - | - | 0 | None found |
| Harris County MUD 401 · Houston | 3,750 | - | - | 0 | None found |
| Postwood MUD · Houston | 3,747 | - | - | 0 | None found |
| Fruitvale WSC · Fruitvale | 3,747 | - | - | 0 | None found |
| Becker Jiba WSC · Kaufman | 3,741 | - | - | 1 | Below limits |
| City of Columbus · Columbus | 3,739 | - | - | 0 | None found |
| Brittmoore Utility · Austin | 3,732 | - | - | 0 | None found |
| South Newton WSC · Deweyville | 3,729 | - | - | 0 | None found |
| Cedar Creek Water System · Itasca | 3,720 | - | - | 0 | None found |
| Loma Vista Water System · Austin | 3,720 | - | - | 0 | None found |
| Encanto Real Utility District · Houston | 3,717 | - | - | 0 | None found |
| Fry Road MUD · Houston | 3,711 | - | - | 0 | None found |
| Harris County MUD 361 · The Woodlands | 3,705 | - | - | 1 | Below limits |
| Northwest Freeway MUD · Houston | 3,678 | - | - | 0 | None found |
| Woodland Oaks Subdivision · Austin | 3,666 | - | - | 0 | None found |
| City of Chandler · Chandler | 3,663 | - | - | 0 | None found |
| Jbsa - Medina · Jbsa Lackland | 3,650 | - | - | 0 | None found |
| City of West Columbia · West Columbia | 3,650 | - | - | 0 | None found |
| Harris County MUD 11 · Houston | 3,645 | - | - | 0 | None found |
| Harris County MUD 208 · Houston | 3,642 | - | - | 3 | Below limits |
| Multi-county WSC · Gatesville | 3,631 | - | - | 3 | Below limits |
| Harris County Wcid 116 · Houston | 3,627 | - | - | 4 | Below limits |
| City of Winnsboro · Winnsboro | 3,614 | - | - | 0 | None found |
| Mitchell County Utility · Austin | 3,612 | - | - | 0 | None found |
| Pecos County Wcid 1 · Fort Stockton | 3,612 | - | - | 0 | None found |
| City of Eastland · Eastland | 3,609 | - | - | 1 | Below limits |
| Four Pines WSC · Palestine | 3,603 | - | - | 0 | None found |
| El Paso County Tornillo Wid · Tornillo | 3,600 | - | - | 0 | None found |
| City of Point · Point | 3,600 | - | 6.5 | 3 | Above limit |
| Falcon Rural WSC · Falcon Heights | 3,600 | - | - | 0 | None found |
| El Dorado Utility District · Houston | 3,591 | - | - | 0 | None found |
| Combine WSC · Crandall | 3,588 | - | - | 4 | Below limits |
| Metroplex Homesteads Water Supply · Austin | 3,588 | - | - | 0 | None found |
| City of Oak Ridge North · Oak Ridge North | 3,585 | - | - | 0 | None found |
| City of Ballinger · Ballinger | 3,583 | - | - | 4 | Below limits |
| Harris County MUD 264 · Houston | 3,573 | - | - | 3 | Below limits |
| Harris County MUD 281 · Houston | 3,573 | - | - | 0 | None found |
| Brazoria County MUD 2 · Houston | 3,567 | - | - | 0 | None found |
| City of Coahoma · Coahoma | 3,552 | - | - | 3 | Below limits |
| Harris County MUD 149 · Houston | 3,543 | - | - | 2 | Below limits |
| Holly Lake Ranch · Litchfield Park | 3,540 | - | - | 0 | None found |
| Williamson County MUD 10 · Austin | 3,513 | - | - | 3 | Below limits |
| Harris County MUD 287 · Houston | 3,510 | - | - | 0 | None found |
| Klein PUD · Houston | 3,504 | - | - | 3 | Below limits |
| Harris County Wcid 132 · Houston | 3,501 | - | - | 3 | Below limits |
| Harris County MUD 257 · Houston | 3,501 | - | - | 4 | Below limits |
| Harris County UD 15 · Houston | 3,489 | - | - | 0 | None found |
| City of Hudson Oaks · Hudson Oaks | 3,487 | - | - | 2 | Sample at limit |
| Harris County MUD 412 · Houston | 3,480 | - | - | 4 | Below limits |
| Angelina WSC · Lufkin | 3,479 | - | - | 1 | Below limits |
| Fort Bend County MUD 121 · Houston | 3,477 | - | - | 0 | None found |
| Oakmont PUD · Houston | 3,450 | - | - | 0 | None found |
| City of Clifton · Clifton | 3,442 | - | - | 0 | None found |
| West Harris County MUD 6 · Houston | 3,435 | - | - | 0 | None found |
| City of Haskell · Haskell | 3,431 | - | - | 1 | Below limits |
| Northwest Harris County MUD 20 · Houston | 3,429 | - | - | 1 | Below limits |
| City of Poteet · Poteet | 3,396 | - | - | 0 | None found |
| City of Dublin · Dublin | 3,388 | - | 4.3 | 2 | Above limit |
| Fort Bend County MUD 122 · Houston | 3,366 | - | - | 5 | Below limits |
| Tdcj Jester 1 Unit · Huntsville | 3,365 | - | - | 0 | None found |
| City of Llano · Llano | 3,352 | - | - | 2 | Below limits |
| G & W WSC · Waller | 3,343 | - | - | 0 | None found |
| Harris County MUD 8 · Houston | 3,271 | - | 2.2 | 6 | Sample at limit |
| City of Bishop · Bishop | 3,186 | - | - | 1 | Below limits |
| Spearman Municipal Water System · Spearman | 3,172 | - | - | 0 | None found |
| Harris County MUD 23 · Spring | 3,170 | - | - | 3 | Below limits |
| Harris County Wcid 161 · Houston | 3,129 | - | - | 5 | Below limits |
| Texas State Technical College - Waco · Waco | 3,100 | - | - | 1 | Below limits |
| City of Needville · Needville | 3,089 | - | - | 0 | None found |
| Upper Jasper County Water Authority 1 · Jasper | 3,048 | - | - | 0 | None found |
| Jasper County Wcid 1 · Buna | 3,035 | - | - | 0 | None found |
| Bois D Arc MUD · Honey Grove | 3,011 | - | - | 0 | None found |
| City of Fairfield · Fairfield | 3,005 | - | - | 0 | None found |
| City of Cactus · Cactus | 3,000 | - | - | 0 | None found |
| City of Hackberry · Frisco | 2,979 | - | - | 4 | Below limits |
| Fort Bliss Biggs Army Airfield · San Dimas | 2,961 | - | - | 0 | None found |
| City of Bartlett · Bartlett | 2,950 | - | - | 0 | None found |
| Kingdom Heights Water System · Sugar Land | 2,934 | - | - | 0 | None found |
| City of Brazoria · Brazoria | 2,900 | - | - | 4 | Below limits |
| City of Van · Van | 2,745 | - | - | 0 | None found |
| Spring West MUD · Houston | 2,639 | - | - | 0 | None found |
| Woodridge MUD · Houston | 2,550 | - | - | 0 | None found |
| Fort Bend County MUD 124 · Houston | 2,544 | - | - | 0 | None found |
| City of Hughes Springs · Hughes Springs | 2,527 | - | - | 1 | Below limits |
| City of Daingerfield · Daingerfield | 2,522 | - | - | 1 | Below limits |
| City of Hooks · Hooks | 2,518 | - | - | 1 | Below limits |
| Richland SUD · Richland Springs | 2,505 | - | - | 0 | None found |
| Chambers County MUD 1 · Houston | 2,500 | - | - | 5 | Below limits |
| Dean Dale SUD · Wichita Falls | 2,492 | - | - | 3 | Below limits |
| Town of Annetta Deer Creek · Annetta | 2,418 | - | - | 0 | None found |
| City of Overton · Overton | 2,275 | - | - | 0 | None found |
| City of Charlotte · Charlotte | 2,247 | - | - | 0 | None found |
| Riverbend Water Resources District · New Boston | 2,235 | - | - | 0 | None found |
| Harris County Fwsd 6 · Channelview | 2,229 | - | - | 0 | None found |
| El Sauz WSC · Roma | 2,223 | - | - | 0 | None found |
| Starrville-friendship WSC · Gladewater | 2,121 | - | - | 0 | None found |
| Sandy Creek Ranches Subdivision · Austin | 2,022 | - | - | 0 | None found |
| Harris County MUD 61 · Houston | 2,016 | - | - | 0 | None found |
| Madera Valley WSC · Verhalen | 2,001 | - | - | 0 | None found |
| Airline Mobile Home Park · Sacramento | 1,973 | - | - | 3 | Below limits |
| Sebastian MUD · Sebastian | 1,884 | - | - | 4 | Below limits |
| Carriage Hills · Austin | 1,833 | - | - | 0 | None found |
| Emerald Bay MUD · Bullard | 1,827 | - | - | 0 | None found |
| Shelbyville WSC · Shelbyville | 1,800 | - | - | 0 | None found |
| Northeast Harris County MUD 1 Sheldon Ri · Houston | 1,788 | - | - | 0 | None found |
| Pattison WSC · Pattison | 1,650 | - | - | 0 | None found |
| Bentwater on Lake Granbury · Austin | 1,584 | - | - | 0 | None found |
| West Harris County MUD 1 · Houston | 1,581 | - | - | 0 | None found |
| Naval Air Station Kingsville · Kingsville | 1,550 | - | - | 0 | None found |
| Canyon Springs Water · Austin | 1,528 | - | - | 3 | Below limits |
| Travis County MUD 18 · Round Rock | 1,491 | - | - | 1 | Below limits |
| City of Trinidad · Trinidad | 1,482 | - | - | 4 | Below limits |
| City of Menard · Menard | 1,471 | - | - | 0 | None found |
| Lake Livingston Village · Austin | 1,471 | - | - | 1 | Below limits |
| Southwood Estates · Cypress | 1,347 | - | - | 0 | None found |
| Winkler WSC · Streetman | 1,344 | - | - | 3 | Below limits |
| Pine Harbor Subdivision · Austin | 1,314 | - | - | 0 | None found |
| Alto Rural WSC Central High Plant · Alto | 1,305 | - | - | 0 | None found |
| Lakes of Rosehill Water System · Austin | 1,239 | - | - | 5 | Below limits |
| Canyon Park WSC · Onalaska | 1,200 | - | - | 0 | None found |
| City of Tye · Tye | 1,176 | 2.2 | 8.1 | 9 | Above limit |
| Western Pines Mhp · Orem | 1,170 | - | - | 1 | Below limits |
| Emhouse Water System · Corsicana | 1,146 | - | - | 1 | Below limits |
| Paxton WSC Jackson Plant · Joaquin | 1,137 | - | - | 0 | None found |
| City of Houston District 82 · Houston | 1,104 | - | - | 0 | None found |
| Pioneer Valley Water CO · Montague | 1,002 | - | - | 0 | None found |
| Yaupon Cove · New Waverly | 1,000 | - | - | 0 | None found |
| City of Bronte · Bronte | 999 | - | - | 2 | Below limits |
| Arlam Concord WSC · Garrison | 990 | - | - | 0 | None found |
| Methodist Specialty Hospital · San Antonio | 983 | - | - | 0 | None found |
| City of Calvert · Calvert | 962 | - | - | 0 | None found |
| Country Club WSC · Mabank | 957 | - | - | 0 | None found |
| Coolcrest Water System · Austin | 951 | - | - | 0 | None found |
| Knippa WSC · Knippa | 933 | - | - | 0 | None found |
| Texas National MUD · Houston | 931 | - | - | 0 | None found |
| City of Saint Jo · Saint Jo | 881 | - | - | 0 | None found |
| Sugarberry Place · Provo | 864 | - | - | 0 | None found |
| City of Agua Dulce · Agua Dulce | 848 | - | - | 2 | Below limits |
| Mount Houston Square · Houston | 836 | - | - | 0 | None found |
| Bethel Ash WSC Lowe Plant · Athens | 786 | - | - | 0 | None found |
| La Ventana Water Supply System · Dripping Springs | 747 | - | - | 0 | None found |
| M S WSC · Riesel | 744 | - | - | 0 | None found |
| Old Marbach School WSC · George West | 712 | - | - | 0 | None found |
| City of Cumby · Cumby | 685 | - | - | 0 | None found |
| Austin County WSC 4 · Bellville | 681 | - | - | 0 | None found |
| Westrock Texas · Silsbee | 625 | - | - | 0 | None found |
| Wildwood Mobile Home Village · Houston | 577 | - | - | 0 | None found |
| City of Roxton · Roxton | 538 | - | - | 0 | None found |
| Rra Tell Cee Vee Ws · Wichita Falls | 534 | - | - | 1 | Below limits |
| City of Thornton Water System · Thornton | 530 | - | - | 0 | None found |
| Era WSC · Era | 462 | - | - | 0 | None found |
| Spanish Grant Subdivision · Des Peres | 444 | - | - | 0 | None found |
| City of Burton · Burton | 315 | - | - | 1 | Below limits |
| Holiday Estates Water · Austin | 231 | - | 1.0 | 5 | Sample at limit |
| Moss Lake WSC · Gainesville | 219 | - | - | 0 | None found |
| Verde Park Estates · Austin | 213 | - | - | 0 | None found |
| Kings Point WSC · Canyon Lake | 174 | - | - | 0 | None found |
| Austin White Lime Company Mcneil Plant & · Austin | 140 | - | - | 1 | Below limits |
| Spanish Bit Plantation Sub · Cypress | 126 | - | - | 0 | None found |
| Woodland Hills · Austin | 114 | - | - | 0 | None found |
| Third Coast Services · Magnolia | 100 | - | - | 0 | None found |
| Mullins Mobile Home Park · Denton | 87 | - | - | 0 | None found |
| Houston County Wcid 1 · Crockett | 48 | - | - | 0 | None found |
| Dow Texas Freeport Salt Dome 8 · Freeport | 45 | - | - | 3 | Below limits |
| Martin Luther Lutheran Church · Victoria | 40 | - | - | 0 | None found |
| Saws Castle Hills | - | 0.7 | 2 | Sample at limit | |
| Saws Northeast | - | - | 0 | None found | |
| Saws Texas Research Park | - | - | 0 | None found | |
| Wilford Hall Ambulatory Surgical Center | - | - | 0 | None found | |
| Brazoria County MUD 31 | - | - | 0 | None found | |
| Town of Trophy Club Public Improvement D | - | - | 2 | Below limits | |
| Marilee SUD | - | - | 0 | None found | |
| Kaufman County Fwsd 1a · Dallas | - | - | 1 | Below limits |
On a private well in Texas?
EPA's program only covers public systems. Private wells are never part of UCMR 5, so the only way to know is to test. Our well testing guide covers which lab tests to order, and the best well water systems covers what to install once you have results.
Cite this page
Well & Tap. "PFAS in Texas drinking water: results for 1154 systems." Data: U.S. EPA UCMR 5, final release August 2026. https://wellandtap.com/pfas/texas/
Source: EPA UCMR 5 final occurrence data (August 2026); population from EPA SDWIS. Method.