| Company | Location | Certifications | License # |
|---|---|---|---|
| A & R Septic Llc | Hudson, NC | Installer (Level II)Inspector | 13056 |
| A & R Septic Service Llc | Hudson, NC | Inspector | 5825I |
| A & R Septic Service Llc | Hudson, NC | Installer (Level II) | 14950 |
| A Scape Above Llc | Lenoir, NC | Installer (Level II) | 14368 |
| Aaron Deal | Boomer, NC | Installer (Level II) | 11302 |
| Bryan Coffey Construction | Lenoir, NC | Installer (Level IV) | 1700 |
| Buddy Faw Grading Inc | Lenoir, NC | Installer (Level II) | 1783 |
| C & D Septic Tank Llc | Lenoir, NC | Installer (Level II)Inspector | 9301 |
| Charles Franklin Taylor | Lenoir, NC | Installer (Level II) | 9924 |
| Dayton Dirtworx | Boomer, NC | Installer (Level II) | 11067 |
| Eddie Keefer'S Septic Installation | Lenoir, NC | Installer (Level II) | 9771 |
| Flatrock Construction | Granite Falls, NC | Installer (Level II) | 7298 |
| General Renovations Llc | Granite Falls, NC | Installer (Level IV) | 11147 |
| Greene'S Site Development | Lenoir, NC | Installer (Level IV) | 11866 |
| Hamby Land Management | Granite Falls, NC | Installer (Level II) | 14363 |
| High Country Septic & Land Management | Lenoir, NC | Installer (Level II) | 9616 |
| Jackie Severt Grading | Lenoir, NC | Installer (Level II) | 4775 |
| Jeff Yount | Granite Falls, NC | Installer (Level II) | 11522 |
| Jolley Excavating And Septic | Lenoir, NC | Installer (Level II) | 6175 |
| Joseph Whittington | Lenoir, NC | Installer (Level II) | 11555 |
| Joshua Keith Fox | Lenoir, NC | Installer (Level II) | 11299 |
| Keefer Environmental Services | Hudson, NC | Installer (Level II) | 9810 |
| Keefer'S Plumbing And Septic | Lenoir, NC | Installer (Level II) | 9767 |
| Kelley Excavating & Grading Llc | Lenoir, NC | Installer (Level II) | 5777 |
| Kent Excavating & Trucking Llc | Lenoir, NC | Installer (Level II) | 11670 |
| Kerry Barlow | Lenoir, NC | Installer (Level II) | 15272 |
| Kl Shatley Backhoe Service | Lenoir, NC | Installer (Level II) | 9207 |
| Land Grade Solutions | Lenoir, NC | Installer (Level II) | 15271 |
| Landformers | Granite Falls, NC | Installer (Level II) | 11742 |
| M & K Septic Inspections | Granite Falls, NC | Inspector | 11895I |
| Masten Cloer Backhoe | Hudson, NC | Installer (Level IV)Inspector | 1055 |
| Matko Llc | Lenoir, NC | Installer (Level II) | 4578 |
| Matt Price Enterprise | Lenoir, NC | Installer (Level II) | 6000 |
| Michael Powell Septic Solutions Llc | Lenoir, NC | Installer (Level IV) | 9267 |
| Morgan Grading & Landscaping Inc | Hudson, NC | Installer (Level II) | 11005 |
| Nichols Septic Repair | Hudson, NC | Installer (Level II) | 11705 |
| R M Cardwell Properties Llc | Lenoir, NC | Installer (Level IV)Inspector | 11115 |
| Riley Mcneill | Granite Falls, NC | Installer (Level II) | 13082 |
| Rusty Castle Investors Llc | Lenoir, NC | Installer (Level II) | 15418 |
| Sage Excavating | Lenoir, NC | Installer (Level II) | 9859 |
| Septech | Lenoir, NC | Installer (Level II) | 14274 |
| Septech Septic Solutions Llc | Lenoir, NC | Installer (Level II) | 14901 |
| Shooks Excavation & Septic | Lenoir, NC | Installer (Level II) | 14424 |
| Solid Ground Worx | Granite Falls, NC | Installer (Level II) | 14211 |
| Steele Excavation And Septic | Lenoir, NC | Installer (Level II) | 9608 |
| Suddreth Masonry Llc | Granite Falls, NC | Installer (Level II) | 11352 |
| The Rain Chain Llc | Granite Falls, NC | Installer (Level IV) | 11904 |
| Tps Plumbing And Septic Llc | Lenoir, NC | Installer (Level IV)Inspector | 7358 |
| Water Management | Lenoir, NC | Installer (Level IV)Inspector | 1077 |
| Wayne Marvin Haas | Lenoir, NC | Installer (Level II) | 1788 |
| Whisenant Excavating | Granite Falls, NC | Installer (Level II) | 5883 |
| Williams Materials Inc | Granite Falls, NC | Installer (Level II) | 4171 |
| Wind River Environmental | Boone, NC | Installer (Level II) | 15313 |
53 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Caldwell County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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