| Company | Location | Certifications | License # |
|---|---|---|---|
| A 1st Rate Pumping & Potty | Lincoln, NE | Pumper | 403157 |
| Aspen Builders Inc | Lincoln, NE | Installer | 401655 |
| Auger and Spade LLC | Lincoln, NE | Designer | 436717 |
| Beavers Lagoon Cleaning | Firth, NE | Inspector | 411258 |
| Carter Well and Septic | Hickman, NE | Inspector | 411797 |
| Game and Parks Commission | Lincoln, NE | Installer | 411363 |
| H L Muhlbach Construction | Lincoln, NE | InspectorInstaller | 402892 |
| HEP Inc | Lincoln, NE | Installer | 402811 |
| Infinity Excavating | Lincoln, NE | Installer | 410467 |
| John Henry's Plumbing | Lincoln, NE | Installer | 411397 |
| Lincoln Demolition & Excavatio | Lincoln, NE | Installer | 435044 |
| Lincoln-Lancaster Co Health | Lincoln, NE | Inspector | 402648 |
| Nebraska Rural Septic | Lincoln, NE | Installer | 411708 |
| Nebraska Septic | Lincoln, NE | InstallerPumper | 433647 |
| Raymond Contracting Inc | Raymond, NE | InspectorInstaller | 402672 |
| S&L Trenching | Waverly, NE | Installer | 436517 |
| Southwick Liquid Waste | Hickman, NE | InspectorInstallerPumper | 402806 |
| Taylors Excavating | Lincoln, NE | Installer | 411781 |
18 companies in the Nebraska DEE onsite wastewater (OWT) certified business registry are based in Lancaster County as of 2026-07-23. Companies based elsewhere in Nebraska also commonly serve the county.
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