Well water testing labs in Guadalupe 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 Guadalupe 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 |
|---|---|---|---|---|
| Guadalupe - Blanco River Authority Regional Laboratory | Seguin | Yes | Call | (830) 379-5822 |
Guadalupe - Blanco River Authority Regional Laboratory
933 East Court Street, Seguin, TX 78155 · map (OpenStreetMap)
Phone: (830) 379-5822
Bacteria (total coliform / E. coli)Water quality parameters
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