| Company | Location | Certifications | License # |
|---|---|---|---|
| A-1 Appalachian Pumping | Boone, NC | Installer (Level IV)Inspector | 9164 |
| Ach Septic Services Llc | Boone, NC | Installer (Level IV)Inspector | 11578 |
| Ach Septic Services Llc | Boone, NC | Installer (Level IV)Inspector | 11588 |
| Amy Lynn Husted | Vilas, NC | Installer (Level IV) | 13084 |
| Benjamin Phillips Excavating & Landscap | Elk Park, NC | Installer (Level IV) | 5484 |
| Blue Ridge Environmental Services Llc | Sugar Grove, NC | Installer (Level II) | 15262 |
| Braswell Excavating Llc | Vilas, NC | Installer (Level II) | 11333 |
| Brooks Plumbing & Heating Inc | Vilas, NC | Installer (Level IV) | 1039 |
| Brooks Plumbing & Heating Inc | Vilas, NC | Installer (Level IV) | 1038 |
| Bryan Grading | Boone, NC | Installer (Level IV) | 4954 |
| Campbell Construction | Zionville, NC | Installer (Level IV) | 6617 |
| Carters Plumbing & Repair Inc | Vilas, NC | Installer (Level II) | 6678 |
| Chris Moretz Backhoe | Boone, NC | Installer (Level II) | 3076 |
| Dana M Moretz | Boone, NC | Installer (Level II) | 4875 |
| Daniel A Schneider | Boone, NC | Installer (Level II) | 9809 |
| Danny Phillips Backhoe & Grading | Sugar Grove, NC | Installer (Level II) | 1676 |
| Darren Moretz Backhoe Service | Boone, NC | Installer (Level II) | 1673 |
| Ecocare Groundskeeping Inc | Boone, NC | Installer (Level IV)Inspector | 6170 |
| Eddie Wingler Construction | Banner Elk, NC | Installer (Level II) | 9801 |
| Eric Hartley Construction Inc | Boone, NC | Installer (Level II) | 2851 |
| Estate Maintenance Company Inc | Boone, NC | Installer (Level IV) | 3493 |
| Estes Grading Llc | Boone, NC | Installer (Level II) | 1847 |
| Etc Construction Llc | Boone, NC | Installer (Level II) | 14176 |
| G & G Excavating | Vilas, NC | Installer (Level II) | 2975 |
| G & K Grading And Landscaping | Zionville, NC | Installer (Level II) | 7361 |
| Gaged Out Services Llc | Boone, NC | Installer (Level II)Inspector | 11575 |
| Graham Roten Enterprises Llc | Boone, NC | Installer (Level IV)Inspector | 6897 |
| High Country Carpentry Llc | Boone, NC | Installer (Level II) | 11673 |
| High Country Carpentry Llc | Boone, NC | Installer (Level II) | 11672 |
| Highland Homes Of Nc Inc | Marion, NC | Installer (Level II) | 11367 |
| Highlander Services | Vilas, NC | Installer (Level II) | 3117 |
| Hillside Private Residential Landscaping | Blowing Rock, NC | Installer (Level II) | 14218 |
| Hodges Construction Llc | Boone, NC | Installer (Level II) | 14840 |
| Hollars Const | Vilas, NC | Installer (Level II) | 1642 |
| Innovative Waterworks Llc | Blowing Rock, NC | Installer (Level IV) | 2998 |
| J W Munday Enterprises | Zionville, NC | Installer (Level IV)Inspector | 6647 |
| Jacob Moretz Excavation | Boone, NC | Installer (Level II) | 11961 |
| Jed Patton | Benner Elk, NC | Installer (Level II) | 14407 |
| Joe Greene Excavating Inc | Boone, NC | Installer (Level IV) | 1706 |
| Joe Lynn Brown | Vilas, NC | Installer (Level II) | 4892 |
| Keith E Vanderwerken | Blowing Rock, NC | Installer (Level IV) | 11360 |
| Kostis Builders Inc | Vilas, NC | Installer (Level II) | 2872 |
| L & J Construction | Sugar Grove, NC | Installer (Level II) | 3863 |
| Lunas Property And Septic Services | Boone, NC | Installer (Level II) | 11212 |
| Mcguires Grading Llc | Vilas, NC | Installer (Level IV) | 2989 |
| Michael Garlock Trucking Inc | Boone, NC | Installer (Level IV)Inspector | 11421 |
| Moodys Backhoe Service Inc | Vilas, NC | Installer (Level IV) | 1130 |
| Mountain Cat Construction Inc | Blowing Rock, NC | Installer (Level II) | 15404 |
| Moutain Shadows Landscaping | Boone, NC | Installer (Level IV) | 3046 |
| Munday Enterprises Of Nc | Boone, NC | Inspector (Private Compliance Inspector) | 30007PCI |
| Norris Excavating | Boone, NC | Installer (Level II) | 3078 |
| Pennell Excavation Llc | Zionville, NC | Installer (Level IV) | 6740 |
| Phillips Brothers Construction Llc | Deep Gap, NC | Installer (Level II) | 9389 |
| Proffit Grading | Boone, NC | Installer (Level IV) | 3000 |
| R & D Residential Services | Boone, NC | Installer (Level II) | 11654 |
| R & D Residential Services Llc | Boone, NC | Inspector | 11946I |
| Reese Landscaping & Grading | Sugar Grove, NC | Installer (Level IV) | 14101 |
| Robert Canter Excavating | Boone, NC | Installer (Level II) | 2807 |
| Ronnie Jones Const Co Inc | Boone, NC | Installer (Level IV) | 1852 |
| Roy Triplett Plumbing Inc | Vilas, NC | Installer (Level IV) | 1724 |
| Solid Ground Grading Inc | Boone, NC | Installer (Level II) | 2857 |
| Ths Earthworks Llc | Boone, NC | Installer (Level II) | 7382 |
| Travis Wilson Construction Inc | Boone, NC | Installer (Level II) | 2936 |
| Turf N Dirt Llc | Deep Gap, NC | Installer (Level IV) | 9762 |
| Veteran Grading Llc | Boone, NC | Installer (Level II) | 9497 |
| Watauga Valley Services | Boone, NC | Installer (Level II) | 6093 |
| William Lawrence Olson | Sugar Grove, NC | Installer (Level II) | 15248 |
| Willow Creek Grading & Landscaping Llc | Vilas, NC | Installer (Level II) | 11548 |
68 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Watauga County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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