| Company | Location | Certifications | License # |
|---|---|---|---|
| A C Septic | Oxford, NC | Installer (Level IV)Inspector | 6539 |
| Alien Septic | Oxford, NC | Installer (Level IV)Inspector | 9934 |
| Blackley Brothers | Oxford, NC | Installer (Level II) | 1935 |
| Blackley Brothers | Oxford, NC | Installer (Level IV) | 1903 |
| Carolina Excavation Specialties | Oxford, NC | Installer (Level IV) | 9592 |
| Chris Milko Llc | Creedmoor, NC | Installer (Level IV) | 1910 |
| Chris Milko Llc | Creedmoor, NC | Installer (Level IV) | 11576 |
| Clayton Breedlove | Oxford, NC | Installer (Level II) | 5699 |
| Cole'S Backhoe Service | Kittrell, NC | Installer (Level IV)Inspector | 1905 |
| Currin Farms | Oxford, NC | Installer (Level IV)Inspector | 6500 |
| Currin Septic Service | Creedmoor, NC | Installer (Level II) | 5127 |
| Currins Septic Service | Creedmoor, NC | Inspector | 13039I |
| Daniel Gladden | Oxford, NC | Installer (Level II) | 14044 |
| Ellington & Son Inc | Oxford, NC | Installer (Level II) | 7241 |
| Enyo"Rwood Plumbing Inc | Oxford, NC | Inspector | 4676I |
| Excel Development Llc | Oxford, NC | Installer (Level II) | 14790 |
| Flowmaster Plumbing & Pump Service Inc | Oxford, NC | Installer (Level II) | 11178 |
| Hidden Creek Septic | Wake Forest, NC | Installer (Level II) | 9477 |
| Hsr Inspection Services Llc | Stem, NC | Inspector | 9351I |
| James Ward Green | Oxford, NC | Installer (Level II) | 9921 |
| Next Gen Drain Solutions | Oxford, NC | Installer (Level IV)Inspector | 13050 |
| Norwood Plumbing | Oxford, NC | Installer (Level II)Inspector | 7223 |
| Plumbserve Llc | Creedmoor, NC | Installer (Level IV) | 12078 |
| Plumbserve Llc | Creedmoor, NC | Installer (Level IV) | 12079 |
| Plumbserve Llc | Creedmoor, NC | Inspector | 11901I |
| Precision Landscapes Llc | Franklinton, NC | Installer (Level II) | 15051 |
| Press Yelder Grading And Hauling | Oxford, NC | Installer (Level IV)Inspector | 7214 |
| Right Way Construction Incorporated | Oxford, NC | Installer (Level IV) | 7136 |
| Robert Blackley Jr Blackley Brothers | Oxford, NC | Installer (Level II) | 8067 |
| S D Jones Construction Llc | Oxford, NC | Installer (Level II) | 11206 |
| Sterling Thomas Bullock | Oxford, NC | Installer (Level II) | 9842 |
| Triangle Soil Consulting Pllc | Bullock, NC | Designer (Soil Evaluator) | 10050E |
| Will'S Farming Inc | Oxford, NC | Installer (Level II) | 14785 |
| Wilson Construction | Oxford, NC | Installer (Level II) | 11051 |
| Wilson Construction | Oxford, NC | Installer (Level II) | 11053 |
35 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Granville County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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