| Company | Location | Certifications | License # |
|---|---|---|---|
| Aaron Foster | Wheeling, WV | Installer (Class II) | 54-14-A-008 |
| ALLEN E. morgan | Wheeling, WV | Installer (Class II) | 54-79-A-0133 |
| Benjamin E. Willis | Moundsville, WV | Installer (Class I) | 54-20-018 |
| Brandon K. Hillberry | Wheeling, WV | Installer (Class I) | 54-20-039 |
| Charles E. Norris Jr. | Moundsville, WV | Installer (Class I) | 54-99-0614 |
| Daniel W. Mcfarland Jr. | Wheeling, WV | Installer (Class I) | 54-20-026 |
| John D. Lightner Jr. | Moundsville, WV | Installer (Class II) | 54-99-A-0612 |
| John Dennis Jr. | Moundsville, WV | Installer (Class II) | 54-99-A-0612 |
| John J. Hart | Moundsville, WV | Installer (Class II) | 54-85-A-0034 |
| John W. Ruckman | Moundsville, WV | Installer (Class II) | 54-90-A-0603 |
| Justin Rine | Proctor, WV | Installer (Class I) | 54-21-005 |
| Kenneth W. Whorton | Wheeling, WV | Installer (Class I) | 54-95-0609 |
| Luke Foster | Moundsville, WV | Installer (Class II) | 54-20-A-025 |
| Nick J. Brautigan | Moundsville, WV | Installer (Class I) | 54-20-017 |
| Troy D. Schrack | Cameron, WV | Installer (Class I) | 54-04-0045 |
15 companies in the West Virginia OEHS certified onsite sewage system installers are based in Marshall County as of 2026-07-23. Companies based elsewhere in West Virginia also commonly serve the county.
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