| Company | Location | Certifications | License # |
|---|---|---|---|
| Advento Alanis | — | Installer (Class I) | OS0035571 |
| Benito Ricardo Chapa | — | Installer (Class II)Designer (Site Evaluator)Inspector (Maintenance Provider) | OS0025355 |
| Ciara D Almeida | — | Installer (Class I) | OS0033108 |
| Frank Jr Prado | — | Installer (Class I) | OS0026607 |
| Jason C Torres | — | Designer (Site Evaluator) | OS0034036 |
| Jesse Mendez | — | Installer (Class I) | OS0008065 |
| Marco A Sr Jimenez | — | Installer (Class I) | OS0033827 |
| Mario Mendietta | — | Installer (Class II)Inspector (Maintenance Provider) | OS0023255 |
| Orlando R Mata | — | Installer (Class I) | OS0029182 |
| Roy C Saenz | — | Installer (Class I) | OS0008162 |
10 companies in the TCEQ OSSF (On-Site Sewage Facility) occupational licenses are based in Kleberg County as of 2026-07-23. Companies based elsewhere in Texas also commonly serve the county.
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