| Company | Location | Certifications | License # |
|---|---|---|---|
| Brent L Hill | — | Designer (Site Evaluator) | OS0029755 |
| David Grant | — | Installer (Class II)Designer (Site Evaluator) | OS0035678 |
| Shawn Eric Rivas | — | Installer (Class I) | OS0039690 |
| Timothy Wayne Wooten | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0030692 |
4 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Martin County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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