| Company | Location | Certifications | License # |
|---|---|---|---|
| Able Septic & Dirt Work LLC | Milaca, MN | Installer | L4445 |
| Absolute Septic Inc. | Milaca, MN | DesignerInspectorInstallerPumper | L2633 |
| Assured Septics LLC | Milaca, MN | Installer | L2318 |
| Benoit's Septic Service LLC | Milaca, MN | Pumper | L4164 |
| Gregg Arndt Septic | Milaca, MN | DesignerInstaller | L2474 |
| Jim's Mille Lacs Disposal, Inc. | Milaca, MN | Pumper | L2703 |
| Jindra's Sewer Service Inc. | Foreston, MN | Pumper | L244 |
| Johnson Septic Systems & Excavating, Inc. | Milaca, MN | DesignerInspectorInstallerPumper | L1023 |
| Knapp and Sons Septic LLC | Milaca, MN | DesignerInspectorInstaller | L2930 |
| Logan's Excavating Inc. | Milaca, MN | DesignerInspectorInstaller | L4030 |
| Mama T's Septic Service, LLC | Milaca, MN | DesignerInspector | L2615 |
| Milton Contracting Inc | Onamia, MN | InstallerPumper | L2473 |
| Miss Pumper | Wahkon, MN | Pumper | L4131 |
| R & R Septic | Onamia, MN | Designer (Advanced)Inspector (Advanced)Installer | L2846 |
| Rahm Excavating Inc | Foreston, MN | Installer | L928 |
| Rosevold Inspection Services | Princeton, MN | DesignerInspector | L1790 |
| Septic Check | Milaca, MN | Designer (Advanced)Inspector (Advanced)InstallerPumper | L2624 |
| West Branch Construction | Princeton, MN | Installer | L1606 |
18 companies in the Minnesota MPCA SSTS licensed business registry are based in Mille Lacs County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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