| Company | Location | Certifications | License # |
|---|---|---|---|
| Brandon Norling Engineering | Santa Maria, CA | Installer (C-42) | 1030747 |
| Carroll Plumbing & Maintenance Inc | Santa Barbara, CA | Installer (C-42) | 335667 |
| Carroll R J & Sons Inc | Santa Barbara, CA | Installer (C-42) | 209226 |
| Clay'S Septic & Jetting Inc | Guadalupe, CA | Installer (C-42) | 674109 |
| Edwards Vernon Constructors Inc | Santa Maria, CA | Installer (C-42) | 486458 |
| Jenkins D K Plumbing | Santa Barbara, CA | Installer (C-42) | 352570 |
| Jon'S Equipment And Construction Inc | Buellton, CA | Installer (C-42) | 573527 |
| Klaft Jeffrey Backhoe Service | Santa Ynez, CA | Installer (C-42) | 714882 |
| Lindblom Marc Plumbg & Sanitation Company | Santa Barbara, CA | Installer (C-42) | 665489 |
| Litle Backhoe Services | Santa Ynez, CA | Installer (C-42) | 571448 |
| Mc Clellan'S Equipment & Sanitation | Goleta, CA | Installer (C-42) | 454579 |
| Penta Michael Sewer Specialist Inc | Los Olivos, CA | Installer (C-42) | 816564 |
| Sartain Emergency Plumbing & Backhoe | Santa Barbara, CA | Installer (C-42) | 582015 |
| Septic Solutions | Lompoc, CA | Installer (C-42) | 926691 |
| Stewart'S & Selzer Plumbing | Summerland, CA | Installer (C-42) | 375514 |
| Valley Pump & Jetting Inc | Santa Maria, CA | Installer (C-42) | 815552 |
| Zierman Plumbing & Heating Inc | Santa Maria, CA | Installer (C-42) | 420848 |
17 companies in the CSLB Licensed C-42 Sanitation System Contractors are based in Santa Barbara County as of 2026-07-23. Companies based elsewhere in California also commonly serve the county.
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