| Business | Phone |
| Bonner Analytical Testing Co 2703 Oak Grove Rd, Hattiesburg 39402 | (601) 264-2854 |
| Engineering Testing Svc 102 W Florence St, Hattiesburg 39401 | (601) 583-3536 |
| Environmental Diagnostic Labs 39 King Rd, Hattiesburg 39402 | (601) 264-2222 |
| Geocon Laboratories Inc 1901 Hardy St, Hattiesburg 39401 | (601) 544-8378 |
| Ladner Testing Laboratories 2123 Glendale Ave, Hattiesburg 39401 | (601) 582-1102 |
| Magnolia Scientific Svc 39 King Rd # 1, Hattiesburg 39402 | (601) 264-5184 |