| Company | Location | Certifications | License # |
|---|---|---|---|
| Andersen Plumbing Inc | Waterloo, NE | Installer | 401602 |
| Becker Trenching & Water | Omaha, NE | Installer | 401654 |
| CleanUp Containers & Pumping | Valley, NE | Pumper | 408674 |
| Crown Pumping LLC | Omaha, NE | Pumper | 437441 |
| Frank's Trenching Inc | Omaha, NE | Installer | 401999 |
| Heimes Corp | Omaha, NE | Installer | 402615 |
| MC Trenching | Omaha, NE | Installer | 402935 |
| Midland Trenching | Omaha, NE | Installer | 410369 |
| Nebraska Plumbing | Omaha, NE | Installer | 412214 |
| Schroeder Plumbing Inc | Elkhorn, NE | InspectorInstaller | 403126 |
| Simon Plumbing | Omaha, NE | Installer | 410801 |
| The Waldinger Corp | Omaha, NE | InstallerPumper | 429217 |
| Thiele Geotech | Omaha, NE | Designer | 402044 |
| Thompson Dreessen & Dorner/TDD | Omaha, NE | Designer | 410385 |
| Two Rivers Pumping & Septic | Waterloo, NE | Pumper | 401553 |
| Utility Trenching Inc | Omaha, NE | Installer | 402720 |
16 companies in the Nebraska DEE onsite wastewater (OWT) certified business registry are based in Douglas County as of 2026-07-23. Companies based elsewhere in Nebraska also commonly serve the county.
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