| Business | Phone |
| Air Quality 707 N Robinson Ave # 4100, Oklahoma City 73102 | (405) 702-4100 |
| Environmental Quality Dept 707 N Robinson Ave, Oklahoma City 73102 | (405) 702-1000 |
| Facility Services 3301 N Santa Fe Ave, Oklahoma City 73118 | (405) 521-3525 |
| Land Protection 707 N Robinson Ave, Oklahoma City 73102 | (405) 702-5100 |
| Water Quality Svc 707 N Robinson Ave, Oklahoma City 73102 | (405) 702-8100 |
| Water Resources Board 3800 N Classen Blvd, Oklahoma City 73118 | (405) 530-8800 |