| Company | Location | Certifications | License # |
|---|---|---|---|
| CJ Carlson Excavating | Stewart, MN | Installer | L2572 |
| Geib Well Co Inc | Arlington, MN | Installer | L653 |
| Jerry Hillmann | Gibbon, MN | Installer | L2904 |
| Klehr Grading & Excavating, Inc. | Arlington, MN | Installer | L3040 |
| Mathews Sewer Systems LLC | Green Isle, MN | InstallerPumper | L135 |
| Melsha Construction Inc | Green Isle, MN | Installer | L2693 |
| Rickert Excavating, Inc | Glencoe, MN | Installer | L2936 |
| Sewer Services, Inc | Belle Plaine, MN | InstallerPumper | L2502 |
| Sons Excavation & Septic | Henderson, MN | Installer | L2606 |
9 companies in the Minnesota MPCA SSTS licensed business registry are based in Sibley County as of 2026-07-23. Companies based elsewhere in Minnesota also commonly serve the county.
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