| Business | Phone |
| Earth Burners Inc/Ebi 5910 Fremont St, Duluth 55807 | (218) 628-0454 |
| Environmental Troubleshooters 3825 Grand Ave, Duluth 55807 | (218) 722-6013 |
| Era Laboratories Inc 4730 Oneota St, Duluth 55807 | (218) 727-6380 |
| Finite Earth Environmental 394 S Lake Ave # 306, Duluth 55802 | (218) 722-5566 |
| Institute For A Sustainable 32 E 1st St, Duluth 55802 | (218) 525-4781 |
| Pro Source Technologies 227 W 1st St, Duluth 55802 | (218) 625-7004 |
| St Louis River Cac 394 S Lake Ave, Duluth 55802 | (218) 733-9520 |
| Swan & Assoc Inc 227 W 1st St # 613, Duluth 55802 | (218) 722-2208 |
| Wilson Environmental Labs Inc 205 W 2nd St # 502, Duluth 55802 | (218) 726-1491 |