| Company | Location | Certifications | License # |
|---|---|---|---|
| Chad Michael Mikush | — | Installer (Class II)Inspector (Maintenance Provider) | OS0040311 |
| Cole W Slaughter | — | Installer (Class II)Inspector (Maintenance Provider) | OS0028424 |
| David R Mehrens | — | Inspector (Maintenance Provider) | MP0001606 |
| Dickie S Jaynes | — | Inspector (Maintenance Provider) | MP0001208 |
| Franklynn John Ellis | — | Installer (Class II)Inspector (Maintenance Provider) | OS0000690 |
| Gabriel Miller | — | Installer (Class I) | OS0039685 |
| Gary S Brummer | — | Inspector (Maintenance Provider) | MP0002499 |
| Joe E Strack | — | Installer (Class II)Inspector (Maintenance Provider) | OS0038208 |
| John Ii Martinez | — | Installer (Class II)Inspector (Maintenance Provider) | OS0008332 |
| Justin Wade Wilcox | — | Installer (Class II)Inspector (Maintenance Provider) | OS0035471 |
| Kody S Witcher | — | Installer (Class II) | OS0033007 |
| Kurt G Turner | — | Installer (Class II)Inspector (Maintenance Provider) | OS0039038 |
| Rodney L Blocker | — | Installer (Class II)Inspector (Maintenance Provider) | OS0034628 |
| Sandy F Wicke | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0027364 |
| Sterling Schmidt | — | Installer (Class II)Inspector (Maintenance Provider) | OS0035798 |
15 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Wharton County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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