| Business | Phone |
| American Plant Diagnostics Inc 3702 W Sample St, South Bend 46619 | (574) 287-9363 |
| Eis Analytical Svc 1701 N Ironwood Dr # B, South Bend 46635 | (574) 277-0707 |
| Ely Chemical 2603 Foundation Dr, South Bend 46628 | (574) 251-9152 |
| Environmental Health Lab 110 S Hill St, South Bend 46617 | (574) 233-4777 |