Texas Well Water Testing Labs

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Well water testing labs in Dallas County, TX

Independent directory. Listings come from the TCEQ Public Water System Lab Map Table (updated 03/26/2026). These labs are accredited for public drinking-water samples; call first to confirm they accept private-well samples, which tests they run, sample bottles, drop-off hours and price.

4 accredited labs listed in Dallas County. Bacteria tests usually need a sterile bottle from the lab and delivery within about 30 hours, so check the lab's sample rules before you collect.

Quick answer

LabCityBacteriaPublished pricePhone
City of Garland Water Utilities LabGarlandYesCall(972) 205-4012
Eurofins Xenco, LLC -DallasDallasYesCall(281) 240-4200
North Texas Municipal Water District LaboratoryWylieYesCall(972) 442-5405
Trinity River Authority Central Regional LaboratoryDallasYesCall(972) 263-2251

City of Garland Water Utilities Lab

2500 E. Centerville Road, Garland, TX 75040 · map (OpenStreetMap)
Phone: (972) 205-4012
Bacteria (total coliform / E. coli)
Source: TCEQ PWS Lab Map Table (Map ID 22) · Last checked Oct 28, 2026

Eurofins Xenco, LLC -Dallas

9701 Harry Hines Boulevard, Dallas, TX 75220 · map (OpenStreetMap)
Phone: (281) 240-4200
Bacteria (total coliform / E. coli)
Source: TCEQ PWS Lab Map Table (Map ID 45) · Last checked Oct 28, 2026

North Texas Municipal Water District Laboratory

810 North Highway 78, Operations Bldg C, Wylie, TX 75098 · map (OpenStreetMap)
Phone: (972) 442-5405
Bacteria (total coliform / E. coli)Lead & copperWater quality parameters
Source: TCEQ PWS Lab Map Table (Map ID 53) · Last checked Oct 28, 2026

Trinity River Authority Central Regional Laboratory

6500 West Singleton Boulevard, Dallas, TX 75212 · map (OpenStreetMap)
Phone: (972) 263-2251
Bacteria (total coliform / E. coli)Lead & copperWater quality parameters
Source: TCEQ PWS Lab Map Table (Map ID 73) · Last checked Oct 28, 2026

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