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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| S & C Excavating, Llc | Fulton, MS | — | Installer | — |
| S & S Mobile Homes | Shannon, MS | — | Installer | — |
| S&C Environmental, Inc. | Starkville, MS | — | Installer | — |
| S&W General Contractor & Services | Lucdale, MS | — | Installer | — |
| Safety Quip, Inc. | Memphis, TN | — | Pumper | — |
| Sanford Llc | Laurel, MS | — | Pumper | — |
| Sanipro Sanitation Services | Collinsville, MS | — | Pumper | — |
| Saucier, Randall | Perkinston, MS | — | Installer | — |
| Save A Lot Septic | Bolton, MS | — | Installer | — |
| Sawgrass Sanitation, Llc | Toomsuba, MS | — | Pumper | — |
| Scarborough Construction | Collinsville, MS | — | Installer | — |
| Schippel Excavation Llc | Columbus, MS | — | Installer | — |
| Scott Holcomb Septic Service | Ecru, MS | — | Installer | — |
| Scott Septic & Pumping | Mantee, MS | — | Pumper | — |
| Sea Industries Corporation | Cordova, TN | — | Pumper | — |
| Seal Digging | Florence, MS | — | Pumper | — |
| Seal Digging Service | Florence, MS | — | InstallerPumper | — |
| Second Generation Inc. | Oxford, MS | — | Installer | — |
| Seldon Construction & Septic | Red Banks, MS | — | Installer | — |
| Self Employed | Gulfport, MS | — | Installer | — |
| Septic Plus | Quitman, MS | — | Pumper | — |
| Septic Plus, Llc | Quitman, MS | — | Installer | — |
| Septic Solutions Of Oxford | Oxford, MS | — | Installer | — |
| Servant Plumbing & Home Services, Llc | Westpoint, MS | — | Installer | — |
| Sessoms Construction | Byhalia, MS | — | Installer | — |
| Shady Creek Properties | Oxford, MS | — | Pumper | — |
| Shaw Supply & Hauling | Saucier, MS | — | Installer | — |
| Shield'S Septic Tank | Moss Point, MS | — | Installer | — |
| Shields Septic Tank Inc. | Moss Point, MS | — | Pumper | — |
| Shields Septic Tanks Inc. | Moss Point, MS | — | Pumper | — |
| Short'S Septic | Lucedale, MS | — | Installer | — |
| Simmons Construction | Enterprise, MS | — | Installer | — |
| Simmons Septic Service | Vicksburg, MS | — | Installer | — |
| Sip Septic Services | Oxford, MS | — | InstallerPumper | — |
| Sj Rowell Inc., Dba Southern Land Contracting | Waynesboro, MS | — | Installer | — |
| Sj Septic Tank Systems | Natchez, MS | — | Installer | — |
| Slay Residential | Lucedale, MS | — | InstallerPumper | — |
| Slay Septic | Lucedale, MS | — | Installer | — |
| Smc Recycling | Selmer, TN | — | Pumper | — |
| Smith & Sons | Iuka, MS | — | Pumper | — |
| Smith & Sons Septic Tank Repair | Iuka, MS | — | Installer | — |
| Smith & Yeager | Meridian, MS | — | Installer | — |
| Smith Plumbing | Perkinston, MS | — | Installer | — |
| Smith Septic Tank Pumping & Septic Services | Moselle, MS | — | Pumper | — |
| Smith, Ronald 'Thomas' (Probationar | Mendenhall, MS | — | Installer | — |
| Smith'S Septic Service | Camden, MS | — | Installer | — |
| Smith'S Septic Tank Service | Poplarville, MS | — | Installer | — |
| Sonny T'S Dba Mr. Rooter Plumbing Of Tupelo | Tupelo, MS | — | Installer | — |
| Sonny T'S Plumbing Llc Dba Mr. Rooter Of Tupelo | Tupelo, MS | — | Pumper | — |
| South & Son Construction | Southaven, MS | — | Installer | — |
| Southern Comfort Portables Llc | Carriere, MS | — | Pumper | — |
| Southern Comfort Services, Llc | Carriere, MS | — | Installer | — |
| Southern Enviro Construction, Llc | Columbia, MS | — | Installer | — |
| Southern Grease Hauling | Mobile, AL | — | Pumper | — |
| Southern Grease Hauling, Inc. | Mobile, AL | — | Pumper | — |
| Southern Homes Safety Inc | Prairie, MS | — | Installer | — |
| Southern Landworks Llc | Saucier, MS | — | Installer | — |
| Southern Mississippi Plumbing Co., Llc | Monticello, MS | — | Installer | — |
| Southern On-Site | Hattiesburg, MS | — | Pumper | — |
| Southern On-Site Storage, Llc | Hattiesburg, MS | — | Pumper | — |
| Southern Paving, Llc | Foxworth, MS | — | Installer | — |
| Southern Roots Land Solutions Llc | Tylertown, MS | — | Installer | — |
| Southern Sanitation Inc. | Lucedale, MS | — | Pumper | — |
| Southern Septic & Construction Llc | Wesson, MS | — | Installer | — |
| Southern Service Company | Quitman, MS | — | Installer | — |
| Southern Sewage Systems | Saucier, MS | — | Installer | — |
| Sparks Septic Tanks | Belmont, MS | — | Installer | — |
| Spears Contractors And Land Management | Saltillo, MS | — | Installer | — |
| Spicer'S | Shannon, MS | — | Installer | — |
| Spinks Construction, Inc. | St. Francisville, LA | — | Installer | — |
| Spring Creek Hardware | Holly Springs, MS | — | Installer | — |
| Springer, Richard (Probationary) | Philadelphia, MS | — | Installer | — |
| Stc (Dba) | Hermanville, MS | — | Installer | — |
| Stevenson, Dedrick D | Macon, MS | — | Installer | — |
| Stogner'S Mechanical Services | Tylertown, MS | — | Installer | — |
| Stovall & Son Plumbing & Electric | Philadelphia, MS | — | Installer | — |
| Strange, Devan (Probationary) | Canton, MS | — | Installer | — |
| Streamline Services Llc | Pontotoc, MS | — | InstallerPumper | — |
| Stringer Septic Service | Sandy Hook, MS | — | InstallerPumper | — |
| Stuart Septic Llc | Hattiesburg, MS | — | Pumper | — |
| Stubbs Heating And Cooling | Magee, MS | — | InstallerPumper | — |
| Sun Coast Septic Tank & Drains | Kiln, MS | — | Installer | — |
| Sundance & Sons, Llc | Lumberton, MS | — | Installer | — |
| Superior Services | West Point, MS | — | Installer | — |
| Swarts Farm | Tylertown, MS | — | Installer | — |
| Swarts Farms | Tylertown, MS | — | Installer | — |
| Swift Septic Service | West Point, MS | — | Installer | — |
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