| Company | Location | Certifications | License # |
|---|---|---|---|
| City of Gretna | Gretna, NE | Inspector | 403182 |
| D & K Excavating Inc | Gretna, NE | InspectorInstaller | 411254 |
| Gearhart Construction LLC | Bellevue, NE | InspectorInstaller | 411172 |
| Hayes Plumbing Inc | Gretna, NE | Installer | 411003 |
| Omaha Pumping Service | Gretna, NE | InspectorPumper | 402706 |
| Plumbing Specialties | La Vista, NE | Installer | 410942 |
| Premier Underground | Gretna, NE | Installer | 403000 |
| Sarpy Co Planning & Bldg Dept | Papillion, NE | Inspector | 410405 |
| TH Construction | Gretna, NE | InstallerPumper | 432904 |
9 companies in the Nebraska DEE onsite wastewater (OWT) certified business registry are based in Sarpy County as of 2026-07-23. Companies based elsewhere in Nebraska also commonly serve the county.
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