| Company | Location | Certifications | License # |
|---|---|---|---|
| Codr Plumbing | Seward, NE | Installer | 435010 |
| Dan's Digging | Seward, NE | Installer | 402974 |
| Earnest Well Drilling Inc | Milford, NE | InspectorInstaller | 401982 |
| Oswald Electric | Milford, NE | Installer | 411016 |
4 companies in the Nebraska DEE onsite wastewater (OWT) certified business registry are based in Seward County as of 2026-07-23. Companies based elsewhere in Nebraska also commonly serve the county.
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