| Company | Location | Certifications | License # |
|---|---|---|---|
| Advanced Sanitation | Camarillo, CA | Installer (C-42) | 1014079 |
| Angel Industries Co | Camarillo, CA | Installer (C-42) | 892927 |
| Arce General Engineering Construction | Oxnard, CA | Installer (C-42) | 839000 |
| B M D Construction | Moorpark, CA | Installer (C-42) | 301780 |
| Burpees Plumbing & Rooter | Simi Valley, CA | Installer (C-42) | 982538 |
| C & M Backflow Plumbing Inc | Oxnard, CA | Installer (C-42) | 958059 |
| Cor Plumbing | Santa Paula, CA | Installer (C-42) | 1133316 |
| Dugan Underground, Corporation | Camarillo, CA | Installer (C-42) | 1115607 |
| Ely Jr'S Pumping Inc | Oxnard, CA | Installer (C-42) | 746011 |
| Fisher Plumbing | Simi Valley, CA | Installer (C-42) | 796984 |
| Gmz Engineering Inc | Westlake Village, CA | Installer (C-42) | 967627 |
| Heathcote Geotechnical | Ventura, CA | Installer (C-42) | 910004 |
| J S Innovative Systems Inc | Camarillo, CA | Installer (C-42) | 842516 |
| La Sewer Repair | Simi Valley, CA | Installer (C-42) | 511290 |
| Mc Cahon Thomas F | Westlake Village, CA | Installer (C-42) | 622552 |
| Pre - Con Installer Inc | Simi Valley, CA | Installer (C-42) | 918774 |
| Pre-Con Products | Simi Valley, CA | Installer (C-42) | 246528 |
| Roy Darrell Enterprises Inc | Camarillo, CA | Installer (C-42) | 651852 |
| Sewer Rescue Inc | Simi Valley, CA | Installer (C-42) | 1067535 |
| Sewer Spy The | Simi Valley, CA | Installer (C-42) | 927424 |
| Shiloh Underground Construction Co Inc | Somis, CA | Installer (C-42) | 627360 |
| Suttles Plumbing & Mechanical Corp | Simi Valley, CA | Installer (C-42) | 268688 |
| Suttles Plumbing Inc | Simi Valley, CA | Installer (C-42) | 965356 |
| Volk Vincent Plumbing | Camarillo, CA | Installer (C-42) | 360487 |
24 companies in the CSLB Licensed C-42 Sanitation System Contractors are based in Ventura County as of 2026-07-23. Companies based elsewhere in California also commonly serve the county.
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