A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · V · W · Z · 0-9
| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| T & R Dirt Contracting | Bismarck, ND | — | Installer | — |
| T-Roy's Porta Potty Service | Hensel, ND | Pembina | Pumper (Class I) | NDSP007376 |
| T&T Transport | Crosby, ND | Divide | Pumper (Class I) | NDSP007277 |
| Tad Schmidt Builders LLC | Devils Lake, ND | — | Installer | — |
| TERAflex Group, LLC | Williston, ND | — | Installer | — |
| The Revelator Services, LLC | Stanley, ND | — | Installer | — |
| Thielbar Septic Service | Langdon, ND | Cavalier | Pumper (Class II) | NDSP007350 |
| Thorlakson Construction | Cavalier, ND | — | Installer | — |
| TLC-Patriot Septic and Excavation | Laurel, MT | — | Installer | — |
| TM Construction | Anamoose, ND | — | Installer | — |
| TNT Plumbing | Oriska, ND | — | Installer | — |
| Toddco | Killdeer, ND | — | Installer | — |
| Toews Building | Grafton, ND | — | Installer | — |
| Tolna Plumbing & Htng, LLC | Tolna, ND | — | Installer | — |
| Tom Klein's Const. & Repair LLC. | Minot, ND | — | Installer | — |
| Top Gun Plumbing | Grandin, ND | — | Installer | — |
| Top Notch Repair | Ellendale, ND | Dickey | Pumper (Class I) | NDSP007283 |
| Total Care Plumbing Inc. | Grand Forks, ND | — | Installer | — |
| Traiser Backhoe Services LLC | Hazen, ND | — | Installer | — |
| Trash Panda Recycling | Montepelier, ND | — | Installer | — |
| Tri-County Contracting | Killdeer, ND | — | Installer | — |
| Triple I Contracting | Williston, ND | — | Installer | — |
| Triple P Rentals LLC | Steele, ND | Kidder | Pumper (Class I) | NDSP007328 |
| Triton Plumbing & Excavating | Bismarck, ND | — | Installer | — |
| True Grade LLC | Mandan, ND | — | Installer | — |
| Turd Burglar | Bismarck, ND | Burleigh | Pumper (Class II) | NDSP007334 |
A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · V · W · Z · 0-9