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Get your water tested in Texas.

The labs Texas certifies to test drinking water, from the state’s own list of March 27, 2026. A lab test is the only way to know what is in your own tap or well.

The short answer

Texas’s list has 80 labs certified to test drinking water. 31 of the labs here are named for a water utility and may test only its own water, so they come last.

Texas’s list covers bacteria and lead and copper. Labs for other tests, such as nitrate or arsenic, are accredited through TCEQ’s separate laboratory accreditation program.

Certification is test by test, so check that a lab is certified for what you want tested, and call first: it will say which bottles to use and how soon the sample has to arrive.

From the state

  • Texas Well Owner Network, Texas A&M AgriLife Extension

    Well Informed screening events, where well owners bring in water samples to be screened for common contaminants, followed by an hour-long session explaining the results. Upcoming events are on the network's calendar.

    Trainings, Texas Well Owner Network, checked Oct. 10, 2026

Labs in Texas

49 labs, by city.

Labs in Texas, certified by Texas
LabCityPhoneCertified for
Abilene–Taylor County Public Health DistrictAbilene(325) 692-5600Bacteria
Pace Analytical Services, LLC -Dallas TXAllen(972) 727-1123Bacteria
Environmental Monitoring LabAmarillo(806) 335-9393Bacteria
Brazoria County Health Department Water LaboratoryAngleton(979) 864-1628Bacteria
Aqua-Tech Laboratories, Inc.Austin(512) 301-9559Bacteria, lead and copper
Integrity Testing, Inc.Austin(512) 891-7777Lead and copper
Texas Department of State Health Services Laboratory Services SectionAustin(512) 458-7318Bacteria, lead and copper
Aqua-Tech Laboratories, Inc.Bryan(979) 778-3707Bacteria, lead and copper
Eastex Environmental Lab, Inc. -ColdspringColdspring(936) 653-3249Bacteria, lead and copper
Nova Biologicals, Inc.Conroe(936) 756-5333Bacteria
Corpus Christi -Nueces County Public Health District LaboratoryCorpus Christi(361) 826-7213Bacteria
Eurofins Xenco, LLC -DallasDallas(281) 240-4200Bacteria
City of El Paso Department of Public HealthEl Paso(915) 212-2765Bacteria
Eurofins Xenco, LLC -El PasoEl Paso(915) 794-1296Bacteria
International Water Quality LabEl Paso(915) 594-5725Bacteria, lead and copper
Pace Analytical Services, LLC -Dallas TXFort Worth(817) 616-5030Bacteria
Tarrant County Public Health LaboratoryFort Worth(817) 321-4758Bacteria
Texas Department of State Health Services South Texas LaboratoryHarlingen(956) 364-8746Bacteria
Environmental Monitoring LabHillsboro(254) 582-2622Bacteria
A & B Environmental Services, Inc.Houston(713) 453-6060Bacteria, lead and copper
ALS Laboratory Group, Environmental Services Division – Houston, TexasHouston(281) 530-5656Lead and copper
City of Houston Health Department, Bureau of Laboratory ServicesHouston(832) 393-3939Bacteria
Envirodyne Laboratories, Inc.Houston(281) 568-7880Bacteria, lead and copper
Eurofins EMLab P&K – HoustonHouston(281) 940-2580Bacteria
Chaparral Laboratories, Inc.Huntsville(936) 291-1881Bacteria, lead and copper
R&C Joy, Inc.Katy(281) 858-5988Bacteria
Southern Petroleum Laboratories (SPL), Inc. (FKA Ana-Lab Corporation)Kilgore(903) 984-0551Bacteria, lead and copper
City of Laredo Health Department LabLaredo(956) 795-4908Bacteria
Environmental Monitoring LabLlano(325) 247-3295Bacteria
Eurofins Xenco, LLC -LubbockLubbock(806) 794-1296Bacteria
Eastex Environmental Lab, Inc.-NacogdochesNacogdoches(936) 569-8879Bacteria
Southern Petroleum Laboratories, Inc. - PlanoPlano(972) 424-6422Bacteria, lead and copper
SKG Engineering, LLCSan Angelo(325) 655-1288Bacteria
Alamo Analytical Laboratories, Ltd.San Antonio(210) 340-8121Lead and copper
San Antonio Metropolitan Health DistrictSan Antonio(210) 207-8887Bacteria
San Antonio Testing Laboratory, LLCSan Antonio(210) 229-9920Bacteria, lead and copper
Edwards Aquifer Research & Data Center, Texas State UniversitySan Marcos(512) 245-2329Bacteria
Water Utility Services, Inc.Spring(281) 290-0704Bacteria
Eurofins Xenco, LLC -HoustonStafford(281) 240-4200Lead and copper
Texas Institute for Applied Environmental Research (TIAER)Stephenville(254) 968-9570Bacteria
Sweetwater -Nolan County Health DepartmentSweetwater(325) 235-5463Bacteria
Analytical Environmental LabsTyler(903) 509-8700Bacteria
Northeast Texas Public Health District LaboratoryTyler(903) 535-0090Bacteria
Wallgren Environmental Services dba Pollution Control ServicesUniversal City(210) 340-0343Bacteria, lead and copper
Pace Analytical Services, LLC -Dallas TXVictoria(361) 465-7989Bacteria
Victoria County Public Health Department Water LaboratoryVictoria(361) 578-6281Bacteria
Bio-Chem Lab, Inc.West(254) 829-8001Bacteria, lead and copper
Wichita Falls Wichita County Public Health District LaboratoryWichita Falls(940) 761-7873Bacteria
Environmental Monitoring LabWinona(903) 877-9222Bacteria

Labs run by water utilities

31 labs named for a water utility or its plant. A utility’s lab may test only its own system’s water, so call before taking a sample there.

Labs run by water utilities, certified by Texas
LabCityPhoneCertified for
City of Abilene, Environmental LabAbilene(325) 676-6041Bacteria, lead and copper
City of Amarillo Environmental LabAmarillo(806) 342-1549Bacteria
City of Arlington Water Utility Laboratory ServicesArlington(817) 575-8966Bacteria, lead and copper
Lower Colorado River Authority Environmental Laboratory ServicesAustin(512) 356-6022Bacteria, lead and copper
Aqua Water Supply CorporationBastrop(512) 581-0705Bacteria, lead and copper
City of Borger Water Plant LabBorger(806) 273-0966Bacteria
Upper Leon River Municipal Water DistrictComanche(254) 879-2228Bacteria
North Water District Lab ServicesConroe(936) 321-6060Bacteria, lead and copper
City of Corpus Christi Water Utilities LaboratoryCorpus Christi(361) 826-1200Bacteria
Trinity River Authority Central Regional LaboratoryDallas(972) 263-2251Bacteria, lead and copper
City of Denison LaboratoryDenison(903) 464-4482Bacteria
City of Denton Municipal LaboratoryDenton(940) 349-8607Bacteria
City of Fort Worth Water Department Centralized Water & Wastewater LabFort Worth(817) 392-5900Bacteria, lead and copper
City of Garland Water Utilities LabGarland(972) 205-4012Bacteria
City of Kerrville LaboratoryKerrville(830) 257-4230Bacteria
Upper Guadalupe River AuthorityKerrville(830) 896-5445Bacteria
City of Lewisville Environmental Control Services LaboratoryLewisville(972) 219-3548Bacteria
Trinity River Authority Lake Livingston Project LaboratoryLivingston(936) 365-2292Bacteria
City of Lubbock Water Treatment Plant LaboratoryLubbock(806) 775-2614Bacteria
Angelina and Neches River AuthorityLufkin(936) 633-7550Bacteria
City of McAllen Central LaboratoryMcAllen(956) 681-1720Bacteria
City of Midland Utilities LaboratoryMidland(432) 681-7618Bacteria
City of Odessa Laboratory ServicesOdessa(432) 368-3536Bacteria
Sabine River AuthorityOrange(409) 746-3284Bacteria, lead and copper
City of Round Rock Environmental Sciences LaboratoryRound Rock(512) 218-5559Bacteria
Guadalupe -Blanco River Authority Regional LaboratorySeguin(830) 379-5822Bacteria
City of Sherman Utilities LaboratorySherman(903) 892-7287Bacteria
City of Texarkana Water Utilities LabTexarkana(903) 798-3850Bacteria
City of Waco Regional Water Quality LaboratoryWaco(254) 750-1664Bacteria
Red River Authority of Texas Environmental Services LaboratoryWichita Falls(940) 723-1717Bacteria
North Texas Municipal Water District LaboratoryWylie(972) 442-5405Bacteria, lead and copper

What to ask a lab to test

Source: TCEQ, drinking water laboratories approved for public water system samples, dated March 27, 2026, read Oct. 10, 2026. Labs are listed as the state lists them; what each is certified for is as far as the list says. Certifications change, so a lab’s own word is the latest.

A lab named for a water utility is listed apart. Distances on town pages are straight lines between ZIP code centers from the Census 2020 gazetteer. How labs are listed here.

Where to go next