| Company | Location | Certifications | License # |
|---|---|---|---|
| Aaa Septic Services Llc | Chico, CA | Installer (C-42) | 1143342 |
| Chamberlain Backhoe & Septic | Chico, CA | Installer (C-42) | 1043534 |
| Chico Septic | Chico, CA | Installer (C-42) | 1039633 |
| Community Construction | Chico, CA | Installer (C-42) | 658031 |
| Dobrich And Sons Septic Service | Magalia, CA | Installer (C-42) | 758026 |
| Earl'S Performance Plumbing | Chico, CA | Installer (C-42) | 772565 |
| Elite Excavating And Septic Service | Paradise, CA | Installer (C-42) | 1100571 |
| Experts In Your Home | Chico, CA | Installer (C-42) | 143778 |
| Fairbanks Paving Company | Oroville, CA | Installer (C-42) | 218271 |
| Hoffman John | Chico, CA | Installer (C-42) | 865793 |
| J P Excavating Construction | Chico, CA | Installer (C-42) | 1138207 |
| M A Magneson | Oroville, CA | Installer (C-42) | 536289 |
| Magneson Tractor Service Inc | Paradise, CA | Installer (C-42) | 1034559 |
| Murray Eric Sanitation Construction | Clipper Mills, CA | Installer (C-42) | 643953 |
| Paradise Demolition And Clean Up | Paradise, CA | Installer (C-42) | 1049870 |
| Re Construction Inc | Chico, CA | Installer (C-42) | 783711 |
| Shimizu Steve Septic Construction | Chico, CA | Installer (C-42) | 877025 |
| Thrifty Rooter Service & Plumbing Co | Chico, CA | Installer (C-42) | 712800 |
18 companies in the CSLB Licensed C-42 Sanitation System Contractors are based in Butte County as of 2026-07-23. Companies based elsewhere in California also commonly serve the county.
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