| Company | Location | Certifications | License # |
|---|---|---|---|
| Advanced Septic & Excavating LLC | Le Roy, MN | DesignerInstaller | L4375 |
| Bruce Bucknell Construction, Inc. | Racine, MN | DesignerInspectorInstallerPumper | L639 |
| Bustad Dozing & Excavating Inc. | Taopi, MN | DesignerInspectorInstaller | L3468 |
| Eric Boe and Sons LLC | Rose Creek, MN | DesignerInspectorInstaller | L4099 |
| Lewis Septic LLC | Le Roy, MN | Pumper | L4262 |
| O'Connell Backhoe and Septic Inc | Spring Valley, MN | DesignerInstallerPumper | L3888 |
| South East Septic LLC | Dexter, MN | DesignerInstaller | L4108 |
7 companies in the Minnesota MPCA SSTS licensed business registry are based in Mower County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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