| Company | Location | Certifications | License # |
|---|---|---|---|
| Danny Neil Thompson | — | Installer (Class II)Designer (Site Evaluator) | OS0003811 |
| Douglas Brian Cox | — | Installer (Class I) | OS0038867 |
| Jamie Gates | — | Installer (Class I) | OS0036272 |
| John R Ii Frantz | — | Installer (Class II) | OS0003802 |
| Ryan P Warkentin | — | Installer (Class II)Designer (Site Evaluator) | OS0029562 |
5 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Hartley County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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