| Company | Location | Certifications | License # |
|---|---|---|---|
| A-1 Precision Pumping, Inc. | Hokah, MN | Designer (Intermediate)Inspector (Intermediate)Pumper | L3310 |
| C Nelson Septic LLC | Houston, MN | Designer (Intermediate)InspectorInstaller | L3647 |
| Grove Plumbing and Heating | Spring Grove, MN | DesignerInstaller | L46 |
| Jake Wieser Construction, Inc. | Houston, MN | DesignerInspectorInstaller | L2929 |
| Mitts Construction LLC | La Crescent, MN | Installer | L4235 |
| Myhre Construction LLC | Eitzen, MN | DesignerInstaller | L3034 |
| Septic Pros | La Crescent, MN | Designer (Intermediate)Inspector (Intermediate)InstallerPumper | L3266 |
7 companies in the Minnesota MPCA SSTS licensed business registry are based in Houston County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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