| Company | Location | Certifications | License # |
|---|---|---|---|
| Ashley Daniels | College Grove, TN | Installer (Type CLM) | 13542 |
| Binkley's Backhoe Service | Franklin, TN | Installer (Type CLM) | 11766 |
| Bob Kennedy Builders, Llc | Fairview, TN | Installer (Type C) | 10600 |
| Buddy Tomlin Jr/Williamson County Septic Service | Thompson'S Station, TN | Installer (Type CLM) | 11782 |
| Crafton Backhoe & Septic Tank Systems | Fairview, TN | Installer (Type CLM) | 11572 |
| Darrell Gottschalk | 1000 Worthington Lane, NJ | Installer (Type CLM) | 12784 |
| Darrell Hollars Construction | Fairview, TN | Installer (Type C) | 12800 |
| E & H Backhoe 5393a Hargrove Road | Franklin, TN | Installer (Type CLM) | 12491 |
| G&M Plumbing CO | Franklin, TN | Installer (Type C) | 18074 |
| Glenn D. Ingram | Franklin, TN | Installer (Type CL) | 12024 |
| Harper Backhoe | Thompson Station, TN | Installer (Type CLM) | 6024 |
| Jason Carter Backhoe | Fairview, TN | Installer (Type CLM) | 143 |
| John Gray , Tn | — | Installer (Type CLM) | 12394 |
| Jordan grading and excavation LLC | Thompsons station, TN | Installer (Type CLM) | 13124 |
| Julie Todesco | Nolensville, TN | Installer (Type CLM) | 14302 |
| Keith Knight | Franklin, TN | Installer (Type CLM) | 11750 |
| L&L Septic Service & Repair | Franklin, TN | Pumper | 683 |
| Lawson Excavating L.L.C. | Spring Hill, TN | Installer (Type CLM) | 13710 |
| MAC Septic LLC | Brentwood, TN | Installer (Type CLM)Pumper | 14228 |
| Opie's Lawn Care & Excavation | Bon Aqua, TN | Installer | 14317 |
| Poor Boy Septic Service | Greeneville, TN | Pumper | 573 |
| Port-a-go | Franklin, TN | Pumper | 969 |
| Poyner Septic Service | Franklin, TN | Pumper | 557 |
| Ross Hunt Contracting, Llc | Fairview, TN | Installer (Type C) | 12611 |
| S and S Hauling LLC- A, Smith | College Grove, TN | Installer (Type C) | 13519 |
| S and S Hauling LLC- W. Smith | College Grove, TN | Installer (Type C) | 13520 |
| Septic Maintenance | Nolensville, TN | Installer (Type CL)Pumper | 11207 |
| Southern Legacy Construction | Spring Hill, TN | Installer (Type C) | 11880 |
| Stephens Excavation Company LLC | Franklin, TN | Installer (Type CLM) | 14223 |
| Williamson County Septic Service | Franklin -Thompson Station, TN | Pumper | 538 |
30 companies in the TDEC active septic system installers & pumpers lists are based in Williamson County as of 2026-07-23. Companies based elsewhere in Tennessee also commonly serve the county.
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