Well water testing labs in Hays 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.
1 accredited lab listed in Hays 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
| Lab | City | Bacteria | Published price | Phone |
|---|---|---|---|---|
| Edwards Aquifer Research & Data Center, Texas State University | San Marcos | Yes | Call | (512) 245-2329 |
Edwards Aquifer Research & Data Center, Texas State University
220 East Sessoms Drive, San Marcos, TX 78666 · map (OpenStreetMap)
Phone: (512) 245-2329
Bacteria (total coliform / E. coli)Water quality parameters
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