| Business | Phone |
| Environ Inc 36630 Northline Rd, Romulus 48174 | (734) 955-9600 |
| Environmental Testing 38900 W Huron River Dr, Romulus 48174 | (734) 955-6600 |
| Heritage-Crystal Clean 28055 Wick Rd, Romulus 48174 | (734) 947-1249 |
| Environmental Disposal Systems 28470 Citrin Dr, Romulus 48174 | (734) 946-1000 |