| Company | Location | Certifications | License # |
|---|---|---|---|
| Edmund Joseph Poth | — | Installer (Class I) | OS0011122 |
| Jim J Muraira | — | Installer (Class II) | OS0032992 |
| Jimmie Deloach | — | Installer (Class I) | OS0038248 |
| Juan M Sanchez | — | Installer (Class I) | OS0033456 |
| Justin M Lopez | — | Installer (Class I) | OS0029528 |
| Paul N Martinez | — | Installer (Class II) | OS0030556 |
| Rafael Cruz | — | Installer (Class II)Designer (Site Evaluator) | OS0006902 |
| Roger D Willborn | — | Installer (Class II) | OS0019874 |
| Rutila O Enriquez | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0038249 |
| Steven G Reyes | — | Installer (Class I) | OS0034060 |
| Waylon L Chisum | — | Installer (Class I) | OS0032335 |
11 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Atascosa County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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