| Company | Location | Certifications | License # |
|---|---|---|---|
| Casey L Barker | — | Installer (Class I) | OS0034168 |
| Donnie M Barnum | — | Installer (Class II)Designer (Site Evaluator) | OS0022285 |
| Dwayne E Lewis | — | Installer (Class II)Designer (Site Evaluator) | OS0035936 |
| Everett W Newton | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0002953 |
| Gavin T Laquey | — | Installer (Class II)Designer (Site Evaluator) | OS0032986 |
| Hayden Day | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0039837 |
| Jason M Person | — | Installer (Class II)Inspector (Maintenance Provider) | OS0019895 |
| Jason Richard Behler | — | Installer (Class II) | OS0041082 |
| Jeffrey A Hoskinson | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0001153 |
| Jesse M Bennie | — | Installer (Class II)Designer (Site Evaluator) | OS0021338 |
| Jimmie B Deen | — | Installer (Class II) | OS0031796 |
| Jimmy D Yarbrough | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0005167 |
| John T Newton | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0000041 |
| Justin Alan Hoskinson | — | Installer (Class II)Designer (Site Evaluator) | OS0036698 |
| Justin Lee Evans | — | Installer (Class I) | OS0029210 |
| Randall W Smith | — | Inspector (Maintenance Provider) | MP0001976 |
| Stephen G Laquey | — | Installer (Class II) | OS0031093 |
| Wesley Scantling | — | Installer (Class I) | OS0036068 |
| William L Pursch | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0002910 |
19 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Brown County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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