| Company | Location | Certifications | License # |
|---|---|---|---|
| Al Hanson Excavating | Alexandria, MN | DesignerInspectorInstaller | L337 |
| Alex Lakes Area Excavating Inc | Carlos, MN | Installer | L2167 |
| Alexandria Sanitary Service Inc. | Garfield, MN | Pumper | L4297 |
| Benedict B Bitzan | Evansville, MN | Installer | L456 |
| Bob's Backhoe Service, LLC | Brandon, MN | Installer | L1215 |
| Brickyard Excavating LLC | Evansville, MN | Installer | L4508 |
| Charles Olson Excavating LLC | Evansville, MN | Installer | L3001 |
| Dirt Dawgz Excavating LLC | Osakis, MN | Installer | L4480 |
| Don Henning Excavating LLC | Miltona, MN | Installer | L142 |
| Elwood Septic Professionals, LLC | Alexandria, MN | Designer (Advanced)Inspector (Advanced) | L2820 |
| Executive Sanitation, Inc | Kensington, MN | Pumper | L3906 |
| Ferguson Brothers Excavating Inc | Alexandria, MN | Installer | L300 |
| Greg Lillemon | Ashby, MN | DesignerInspector | L1224 |
| HPS Rental | Alexandria, MN | Pumper | L4274 |
| Hvezda Excavating Inc | Alexandria, MN | Installer | L509 |
| Mark Lee Excavating Inc | Alexandria, MN | Installer | L67 |
| Midwest Excavating Inc. | Evansville, MN | Installer | L4385 |
| Midwest Pumping & Septic | Evansville, MN | Pumper | L4494 |
| Paz Excavating Inc | Alexandria, MN | Installer | L1991 |
| Perc Plus LLC | Alexandria, MN | DesignerInstaller | L258 |
| Red Rock Tiling and Excavating, Inc. | Kensington, MN | Installer | L4004 |
| Shircliff Construction Inc. | Miltona, MN | Installer | L2268 |
| Tim Sukke Excavating Inc | Carlos, MN | DesignerInspectorInstaller | L2110 |
| Tri County Pumping LLC | Osakis, MN | Pumper | L4467 |
| Waldorf Excavating LLC | Carlos, MN | DesignerInstaller | L295 |
| ZH Excavation, LLC | Brandon, MN | Installer | L3853 |
26 companies in the Minnesota MPCA SSTS licensed business registry are based in Douglas County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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