| Company | Location | Certifications | License # |
|---|---|---|---|
| Abbott Excavating, Inc. | Erhard, MN | DesignerInstaller | L288 |
| Amor Excavating Inc. | Battle Lake, MN | Installer | L4129 |
| Baker Excavating | Wadena, MN | Installer | L3994 |
| Barry Excavating Inc | Dent, MN | DesignerInspectorInstallerPumper | L2821 |
| Baumann Earthworks | Battle Lake, MN | Installer | L4409 |
| Bob's Lakeside Septic | Battle Lake, MN | Designer (Advanced)Inspector (Advanced)InstallerPumper | L4358 |
| Bob's Septic Service | Henning, MN | DesignerInspectorInstallerPumper | L1939 |
| Brogard Plumbing Heating and Excavating Inc | Henning, MN | DesignerInspectorInstaller | L1332 |
| Crescent Septic Services LLC | Elizabeth, MN | Designer (Advanced)Inspector (Advanced) | L4224 |
| Digger's Excavating | Bluffton, MN | DesignerInstaller | L166 |
| Don Schmidt Excavating | Battle Lake, MN | Installer | L2173 |
| Egge Construction Inc | Pelican Rapids, MN | DesignerInstaller | L209 |
| Fergus Power Pump, Inc. | Fergus Falls, MN | InstallerPumper | L524 |
| Haugen's Septic Service | Underwood, MN | Pumper | L4328 |
| Hawes Septic Tank Pumping, LLC | New York Mills, MN | Pumper | L3466 |
| Hodgden Brothers LLC | Perham, MN | Installer | L4522 |
| Jake's Johns, LLC | Ottertail, MN | Pumper | L3482 |
| Jiffy Jon's, Inc. | Pelican Rapids, MN | Pumper | L1313 |
| Joes Backhoe LLC | Ottertail, MN | Installer | L585 |
| Keith Bowman LLC | Parkers Prairie, MN | Installer | L3345 |
| Koep's Septic, LLC | Parkers Prairie, MN | Pumper | L1579 |
| Lake Sewer Service | Battle Lake, MN | Pumper | L1995 |
| Lakes Area Septic & Excavation LLC | Pelican Rapids, MN | Installer | L4503 |
| Lakes Excavating and Septic LLC | Perham, MN | Installer | L4373 |
| Leitch Excavating | Fergus Falls, MN | Installer | L4296 |
| Mr D's Excavating & Septic Systems | Richville, MN | Installer | L2808 |
| Mulchinator Land Management LLC | Parkers Prairie, MN | Installer | L4437 |
| Nature's Call Septic Service | Dalton, MN | Pumper | L4439 |
| Ness Backhoe Inc | Ashby, MN | DesignerInspectorInstaller | L3839 |
| Outdoor Renovations Landscape & Nursery Incorporated | Underwood, MN | Installer | L3637 |
| Pullins Excavating | Parkers Prairie, MN | Installer | L4222 |
| Roisum LLC | Erhard, MN | DesignerInspectorInstaller | L4095 |
| Ross Seifert Septic Service, LLC | Pelican Rapids, MN | DesignerInspectorInstallerPumper | L1322 |
| Ruther Excavating Inc | Richville, MN | DesignerInstaller | L3149 |
| Schueller's Septic Solutions, LLC | Fergus Falls, MN | DesignerInspector | L2945 |
| Septics Plus + LLC / Budke Excavating | Fergus Falls, MN | DesignerInstaller | L3069 |
| Sewer Service | New York Mills, MN | Pumper | L3474 |
| SF Excavating & Septic Systems Inc | Dalton, MN | Installer | L3857 |
| Shaw Excavating & Hauling Inc. | Henning, MN | Installer | L4470 |
| Sonnenberg Excavating LLC | Vergas, MN | DesignerInstaller | L2315 |
| Stoll Inspections, Inc. | Dent, MN | Inspector | L2982 |
| Super Septic Inc of Pelican Rapids | Pelican Rapids, MN | Designer (Advanced)Inspector (Advanced)InstallerPumper | L901 |
| Watkins Excavating | Vergas, MN | DesignerInspectorInstaller | L1933 |
| Wohlwend Construction & Excavating LLC | Parkers Prairie, MN | Installer | L4392 |
44 companies in the Minnesota MPCA SSTS licensed business registry are based in Otter Tail County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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