| Business | Phone |
| Mid-Continent Laboratories 879 Foley St, Jackson 39202 | (601) 353-1183 |
| Mississippi Environmental Lab 500 E Woodrow Wilson Ave, Jackson 39216 | (601) 982-1920 |
| Southern Technical Svc Inc 1627 Westhaven Blvd, Jackson 39209 | (601) 922-8652 |
| Underwriters Laboratories Inc 5935 Highway 18 W, Jackson 39209 | (601) 922-0419 |
| Incare Lab 1151 N State St, Jackson 39202 | (601) 353-0407 |
| Ladner Testing Laboratories 2832 Utica Ave, Jackson 39209 | (601) 362-5421 |