| Company | Location | Certifications | License # |
|---|---|---|---|
| C & N Enterprises, LLC dba C&N Septic Service | Crescent, OK | Septage Hauler | 764 |
| C & N Septic Service | Crescent, OK | Installer (Subsurface, Aerobic Spray) | 1118 |
| Clearline Septic and Storm Shelters | Tuttle, OK | Installer (Aerobic Spray) | 1233 |
| CS Smith Construction LLC | Guthrie, OK | Installer (Subsurface, Lagoon, Aerobic Spray) | 265 |
| Cyclone Septics | Guthrie, OK | Septage Hauler | 760 |
| Environmental Solutions Septic and Portable Toilet | Edmond, OK | Septage Hauler | 866 |
| Red Dirt Septic | Edmond, OK | Installer (Aerobic Spray) | 1169 |
| Red Dirt Septic | Edmond, OK | Installer (Aerobic Spray) | 1170 |
| Red Dirt Septic | Edmond, OK | Septage Hauler | 920 |
| Red Dirt Septic and Backhoe | Edmond, OK | Installer (Aerobic Spray) | 1095 |
| Red Dirt Septic and Backhoe LLC | Edmond, OK | Septage Hauler | 324 |
| Red Dirt Septic and Backhoe LLC | Edmond, OK | Installer (Subsurface, Aerobic Spray, Aerobic Drip) | 765 |
12 companies in the Oklahoma DEQ certified septic installers and licensed septage pumpers/transporters are based in Logan County as of 2026-07-23. Companies based elsewhere in Oklahoma also commonly serve the county.
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