| Business | Phone |
| Accurate Environmental & Lab 505 S Lowry St, Stillwater 74074 | (405) 372-5300 |
| Fort Environmental Labs 515 S Duncan St, Stillwater 74074 | (405) 624-6771 |
| Innovar Environmental 1414 S Sangre Rd, Stillwater 74074 | (405) 707-9885 |
| Stover & Assoc Inc Po Box 2056, Stillwater 74076 | (405) 624-0018 |