| Company | Location | Certifications | License # |
|---|---|---|---|
| Blackwater Pumping | Central City, NE | Pumper | 410840 |
| Erickson Backhoe & Septic | Central City, NE | Installer | 411443 |
| Fenster Plumbing | Chapman, NE | InspectorInstaller | 402039 |
| McIlnay & Company | Central City, NE | Installer | 402861 |
| Nebraska Heating & Air Inc | Central City, NE | Installer | 410335 |
5 companies in the Nebraska DEE onsite wastewater (OWT) certified business registry are based in Merrick County as of 2026-07-23. Companies based elsewhere in Nebraska also commonly serve the county.
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