| Company | Location | Certifications | License # |
|---|---|---|---|
| Al Nystrom Construction LLC | Remer, MN | DesignerInspectorInstaller | L1676 |
| Aletto Onsite/Design | Walker, MN | DesignerInspector | L808 |
| April Thompson | Pine River, MN | Inspector | L4433 |
| Bodell Landscape & Excavation | Pillager, MN | Installer | L3883 |
| Boulder Excavating LLC | Walker, MN | Installer | L2938 |
| Carlson Septic LLC | Pillager, MN | Pumper | L4362 |
| Cass County Construction Corp | Outing, MN | DesignerInspectorInstaller | L2205 |
| Clark Excavating, LLC | Brainerd, MN | Installer | L149 |
| Dale's Septic | Cass Lake, MN | Pumper | L4352 |
| Day's Sewer Service LLC | Backus, MN | InstallerPumper | L3288 |
| Fyle's Portables | Nisswa, MN | Pumper | L2261 |
| Gielen Construction Services | Deer River, MN | DesignerInstaller | L2748 |
| Gielen Excavating | Deer River, MN | DesignerInstaller | L1745 |
| Goble Excavation LLC | Brainerd, MN | DesignerInstaller | L4343 |
| Honer Excavating Inc | Pine River, MN | Installer | L2646 |
| Lake Country Septic Pumping Services LLC | Pequot Lakes, MN | Pumper | L4015 |
| LnL Excavating LLC | Remer, MN | Installer | L4414 |
| M & M Landscaping & Excavating LLC | Longville, MN | Installer | L4403 |
| Miner Dirt Work LLC | Motley, MN | Installer | L4485 |
| North Fork Boulders & Excavating | Pine River, MN | Installer | L2921 |
| Northland Septic Maintenance Inc | Backus, MN | Designer (Advanced)Inspector (Advanced)InstallerPumper | L549 |
| PHB Excavating LLC | Motley, MN | DesignerInspectorInstaller | L2053 |
| Piprude Excavating LLC | Walker, MN | Installer | L2046 |
| Rardin Excavating Inc | Nisswa, MN | Installer | L364 |
| Rasinski Excavating Inc | Nisswa, MN | DesignerInstaller | L133 |
| Ruyak Enterprises Inc | Remer, MN | DesignerInstaller | L3206 |
| Scc Llc | Longville, MN | DesignerInspectorInstaller | L4245 |
| Schrupp Excavating LLC | Pine River, MN | DesignerInstaller | L747 |
| Shafer Excavating | Hackensack, MN | DesignerInspectorInstaller | L1712 |
| Slick Nick Septic LLC | Hackensack, MN | Designer (Advanced)Inspector (Advanced) | L4307 |
| T & C Excavating | Walker, MN | Installer | L1920 |
| T&S Excavating | Pequot Lakes, MN | Inspector | L2314 |
| Top Notch Septic LLC | Backus, MN | DesignerInspectorInstaller | L4465 |
| Tri-County Septic Inspections | Motley, MN | Inspector | L2776 |
| Ultimate Septic Service LLC | Motley, MN | Pumper | L4391 |
| VanVickle Excavating LLC | Pillager, MN | Installer | L4062 |
| W C Peterson Excavating LLC | Federal Dam, MN | DesignerInspectorInstaller | L417 |
| Welk Excavating Inc | Longville, MN | Installer | L3018 |
| Westin Property Development LLC | Pequot Lakes, MN | Installer | L4077 |
| Winter Septic LLC | Walker, MN | DesignerInspector | L4268 |
| Young Excavating Inc | Hackensack, MN | Installer | L44 |
41 companies in the Minnesota MPCA SSTS licensed business registry are based in Cass County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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