| Business | Phone |
| Accurate Environmental Svc 12036 N Pennsylvania Ave, Oklahoma City 73120 | (405) 751-3132 |
| Air Quality Laboratories 2703 S Prospect Ave, Oklahoma City 73129 | (405) 619-5800 |
| Analytical Research Labs 840 Research Pkwy # 546, Oklahoma City 73104 | (405) 330-0043 |
| Isotek Llc 4901 W Reno Ave # 200, Oklahoma City 73127 | (405) 948-8880 |
| Porter Testing Lab 6 Se 4th St, Oklahoma City 73129 | (405) 235-7985 |
| Quan Tem Laboratories 2033 Heritage Park Dr, Oklahoma City 73120 | (405) 755-7272 |