| Company | Location | Certifications | License # |
|---|---|---|---|
| Frank Iv Chavarria | — | Installer (Class II) | OS0033623 |
| Reynaldo Chavarria | — | Installer (Class II) | OS0000254 |
| Thomas J Mares | — | Installer (Class II)Designer (Site Evaluator) | OS0029996 |
3 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Maverick County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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