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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| N/A | Grenada, MS | — | Pumper | — |
| Neal'S Sandblasting | Houston, MS | — | Installer | — |
| Nelson'S Septic Tank Services | Sumrall, MS | — | Installer | — |
| Nethery, Blake (Probationary) | Corinth, MS | — | Installer | — |
| Nichols Septic Tank Co. | Byhalia, MS | — | Pumper | — |
| Nichols Septic Tank Company | Byhalia, MS | — | Pumper | — |
| Nickoles Dirt Construction | Columbus, MS | — | Installer | — |
| No 2 Crew | Shannon, MS | — | Installer | — |
| North American Industrial Services | Moss Point, MS | — | Pumper | — |
| North Miss Well Drilling | Senatobia, MS | — | Installer | — |
| North Mississippi Septic $ Services | Blue Mountain, MS | — | Installer | — |
| North Ms Central Vac | Pontotoc, MS | — | Installer | — |
| Northern Clearing Llc | Byhalia, MS | — | Installer | — |
| Northshore Septic System | Kentwood, LA | — | Installer | — |
A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · Z · 0-9