| Company | Location | Certifications | License # |
|---|---|---|---|
| 7 C'S Environmental | Gastonia, NC | Installer (Level II) | 11556 |
| A & A Outdoor Solutions Llc | Stnaley, NC | Installer (Level IV)Inspector | 7112 |
| All Pro Enviro | Lincolnton, NC | Installer (Level IV)Inspector | 6071 |
| Clear Point Solutions Llc | Denver, NC | Installer (Level II) | 14337 |
| Ctm Construction | Gastonia, NC | Installer (Level II) | 9397 |
| Dcj Services Llc | Bessemer City, NC | Installer (Level IV)Inspector | 5105 |
| Dennis Willis Septic Service | Cherryville, NC | Installer (Level IV)Inspector | 1189 |
| E L Entler Inc | Dallas, NC | Installer (Level II) | 11846 |
| Edco Construction Services | Shelby, NC | Installer (Level IV) | 13008 |
| Eric Stone Septic Service And Backhoe | Mcadenvile, NC | Installer (Level II) | 5659 |
| F.A.C.T. Builders | Cherryville, NC | Installer (Level II) | 4106 |
| Fuller & Co Construction Llc | Bessemer City, NC | Installer (Level IV)Inspector | 1070 |
| Grants Loader And Backhoe Service | Bessemer City, NC | Installer (Level II) | 9984 |
| Ground Thunder Toilets Inc | Charlotte, NC | Installer (Level II) | 15042 |
| Hayner Construction | Kings Mtn, NC | Installer (Level IV) | 12092 |
| Herman Excavation Llc | Lincolnton, NC | Installer (Level II) | 9612 |
| J Lanier Grading Llc | Cramerton, NC | Installer (Level II) | 8044 |
| James Mcdowell | Belmont, NC | Installer (Level II) | 11678 |
| John Laughter Industries | Dallas, NC | Installer (Level IV) | 11086 |
| Justin Goins | Lincolnton, NC | Installer (Level II) | 14357 |
| Kaiser Kayton | Stanley, NC | Installer (Level II) | 14639 |
| Keith Mack Mclean Jr | Gastonia, NC | Installer (Level II) | 9813 |
| Larry Henkle Grading | Mount Holly, NC | Installer (Level IV)Inspector | 7040 |
| Ljc Environmental Compliance | High Shoals, NC | Inspector | 6009I |
| Mark Neagle | Lincolnton, NC | Installer (Level II) | 15367 |
| Mclean Septic | Gastonia, NC | Installer (Level IV)Inspector | 11101 |
| Meredith Payne | Gastonia, NC | Installer (Level II) | 11847 |
| Rays Well Drilling Llc | High Shoals, NC | Installer (Level IV)Inspector | 1159 |
| Richardson Septic | Dallas, NC | Installer (Level IV) | 7021 |
| Roland Black Services | Gastonia, NC | Installer (Level II) | 11037 |
| Ryan Ramsey | Kings Mountain, NC | Installer (Level II) | 15045 |
| Simmons Grading & Consulting Llc | Mt Holly, NC | Installer (Level IV)Inspector | 5094 |
| Stanley Environmental Solutions | Stanley, NC | Inspector | 11245I |
| Stanley Environmental Solutions | Stanley, NC | Inspector | 11118I |
| Stanley Environmental Solutions | Mt Holly, NC | Installer (Level IV)Inspector | 7991 |
| Stanley Environmental Solutions | Stanley, NC | Installer (Level IV) | 5498 |
| Stanley Environmental Solutions | Stanley, NC | Installer (Level IV)Inspector | 5505 |
| Superior Plumbing And Drains | Gastonia, NC | Installer (Level II) | 11975 |
| Thomas Sherrill | Belmont, NC | Installer (Level II) | 14422 |
| Tommy Lee Webb | Dallas, NC | Installer (Level II) | 14946 |
| Ub Trucking And Tractor Works | Gastonia, NC | Installer (Level IV)Inspector | 1048 |
41 companies in the NCOWCICB certified onsite wastewater contractor & inspector lists are based in Gaston County as of 2026-07-23. Companies based elsewhere in North Carolina also commonly serve the county.
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