| Company | Location | Certifications | License # |
|---|---|---|---|
| Bobby Joel I Vestal | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0025725 |
| Charles G Price | — | Installer (Class II)Designer (Site Evaluator) | OS0028351 |
| Clay C Irvin | — | Installer (Class I)Designer (Site Evaluator) | OS0029773 |
| Eddie Chris Elliott | — | Installer (Class II)Inspector (Maintenance Provider) | OS0025137 |
| Marcus N Covington | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0024063 |
| Scott W Wiler | — | Installer (Class II)Inspector (Maintenance Provider) | OS0005016 |
| Stanley Shane Mayhan | — | Installer (Class I) | OS0005490 |
7 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Upshur County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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