| Company | Location | Certifications | License # |
|---|---|---|---|
| Andy Ray Evans | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0027726 |
| Charles Stevens Oliver | — | Installer (Class II)Inspector (Maintenance Provider) | OS0039545 |
| Dennis C Moore | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0000170 |
| Dolen Wright | — | Installer (Class II) | OS0037337 |
| Donald Wayne Jr Marlow | — | Installer (Class II)Inspector (Maintenance Provider) | OS0018650 |
| Frank Dwayne Sr Green | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0004564 |
| Fridolph R Swanson | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0030745 |
| Heath J Parker | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0033570 |
| Hollie Renay Oliver | — | Designer (Site Evaluator) | OS0038155 |
| Jacob N Young | — | Designer (Site Evaluator) | OS0033896 |
| Jason A Justice | — | Installer (Class II) | OS0040821 |
| Kristi Amber Powell | — | Installer (Class I) | OS0040090 |
| Kyle Kendrick | — | Installer (Class II) | OS0039727 |
| Landon Blake Mattatall | — | Installer (Class I) | OS0040811 |
| Lisa D Ellis | — | Designer (Site Evaluator) | OS0012008 |
| Luis Garzon | — | Installer (Class II) | OS0041371 |
| Marion Joe Sheets | — | Designer (Site Evaluator) | OS0035349 |
| Mark D Greenhaw | — | Inspector (Maintenance Provider) | MP0002519 |
| Michael P Holmes | — | Installer (Class II)Inspector (Maintenance Provider) | OS0039054 |
| Robert W Pixley | — | Installer (Class II)Inspector (Maintenance Provider) | OS0028195 |
| Ronnie Lee Leggett | — | Installer (Class II)Inspector (Maintenance Provider) | OS0003751 |
| Sebastian Reyes | — | Installer (Class I) | OS0041583 |
| Shannon Lynn Goins | — | Installer (Class II)Inspector (Maintenance Provider) | OS0029928 |
| Shaun L Dubois | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0033042 |
| Stuart Lee Overstreet | — | Installer (Class I) | OS0039561 |
| Tarra R Reynolds | — | Designer (Site Evaluator) | OS0038151 |
| Todd Edward Rs Gardner | — | Designer (Site Evaluator) | OS0007231 |
| Wesley C Saxton | — | Installer (Class II)Inspector (Maintenance Provider) | OS0031800 |
28 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Polk County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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