- Missouri Department of Natural Resources 800-361-4827
- Natural Resources Conservation Service 573-876-0900
- Department of Conservation 573-751-4115
- Rural Development 573-876-0995
- Department of Agriculture 573-751-4211
- Septic Tanks (Missouri) 573-751-6095
- Department of Economic Development 800-523-1434
- Division of Tourism 573-751-4133
- Department of Health and Senior Services 573-751-6400
- U.S. Army Corps of Engineers St Louis District Office 314-331-8567
- Environmental Protection Agency - Region 7 800-223-0425 or 913-551-7122
- Fish and Wildlife Service 573-876-1899
- Mark Twain National Forest 573-364-4621
- Air Pollution Control Program 573-751-4817
- Community Assistance Office 800-361-4827
- Division of Environmental Quality 573-751-6892
- Environmental Services Program 573-526-3315
- Environmental Improvement and Energy Resources Authority 573-751-4919
- Field Services Division 573-526-5804
- Division of State Parks 800-334-6946
- Division of Geology & Land Survey 573-368-2100
- Hazardous Waste Program 573-751-3176
- Solid Waste Management Program 573-751-5401
- Land Reclamation Program 573-751-4041
- Missouri Energy Center 800-361-4827
- Missouri Resources Magazine 800-361-4827
- Public Drinking Water Branch 573-751-1300
- Water Resources Center 800-361-4827
- Soil and Water Conservation Program 573-751-4932
- State Historic Preservation Office 800-334-6946
- Water Pollution Control Branch 573-751-1300