| Business | Phone |
| A J Chandler & Assoc Ltd 12 Urbandale Ave, North York M2M 2H1 | (416) 250-6570 |
| Andmir Environmental High Tech 235 Yorkland Blvd, North York M2J 4Y8 | (416) 491-9955 |
| Angus Environmental Ltd 44 Upjohn Rd, North York M3B 2W1 | (416) 383-0957 |
| Apollo Environmental Systems 270 Yorkland Blvd #150, North York M2J 5C9 | (416) 491-1441 |
| Aqua Terre Solutions Inc 1450 Lodestar Rd, North York M3J 3C1 | (416) 635-5882 |
| Hazcon Group Ltd 1120 Finch Ave W, North York M3J 3H7 | (416) 736-1214 |
| Invironix Engineering 105 Hillmount Ave, North York M6B 1X5 | (416) 782-4146 |
| Bovar Environmental 2 Tippett Rd, North York M3H 2V2 | (905) 822-0331 |
| Marsulex Inc 111 Gordon Baker Rd #300, North York M2H 3R1 | (416) 496-9655 |
| Maxwell Excavating Ltd 304 Hillhurst Blvd, North York M6B 1N1 | (416) 785-6456 |
| Resource Environmental Assoc 111 Gordon Baker Rd #700, North York M2H 3R1 | (416) 495-1314 |
| Barenco Inc 2561 Stouffville, North York | (416) 222-7232 |
| Scimus Inc 18 Aneta Cir, North York M2M 3J2 | (416) 225-1697 |
| Sophware Group 1110 Finch Ave W #814, North York M3J 2T2 | (416) 736-4295 |
| Vestar 255 Consumers Rd #130, North York M2J 1R4 | (905) 673-2050 |
| W & W Radiological & Envrnmntl 115 Banstock Dr, North York M2K 2H7 | (416) 730-8490 |
| Waste Alternatives Inc 60 Wingold Ave, North York M6B 1P5 | (416) 256-2010 |
| Ceia Ontario 2175 Sheppard Ave E, North York M2J 1W8 | (416) 531-7884 |
| Cheminfo Services 1706 Avenue Rd, North York M5M 3Y6 | (416) 785-3340 |
| Church & Trought Inc 41 Valleybrook Dr #101, North York M3B 2S6 | (416) 391-2527 |
| Duke Engineering & Svc Inc 240 Duncan Mill Rd, North York M3B 1Z4 | (416) 447-9400 |
| Genetron Systems Inc 4801 Keele St, North York M3J 3A4 | (416) 665-8155 |