Required Setbacks for Missouri There are two main types of setbacks that are required for animal feeding operations in the state of Missouri; land application setbacks and production area setbacks. Setbacks are required to reduce the potential contamination of water with manure constituents. The following information will provide the information that is needed to stay in compliance with Missouri Department of Natural Resources. More restrictive setbacks may be required by county zoning or health ordinances. The Animal Feeding Operation Site Evaluation Tool is the best way to determine the setback requirements for your location. Land Application Setbacks Missouri's separation distances that are required for land application are illustrated in Table 1. Flood-prone areas, which flood at a frequency greater than once every 10 years, should not be the only land available for application of manure. Land application setbacks are also important to understand for they will help you to understand how much land is available for manure application after complying with the required setbacks. Table 1- Missouri's Land Application Setbacks. Feature Separation Distance Losing streams, sinkholes, caves, wells, abandoned wells, water supply structures or impoundments and any other connection between surface and groundwater 300 feet Permanent flowing streams, intermittent flowing streams, privately owned impoundment not used as a water supply and surface waters down gradient to land application 100 feet Property lines or public roads 50 feet Dwelling or public use area (spray irrigation) 150 feet Dwelling or public use area (tank wagon or solid spreader) 50 feet Exceptions for land application setbacks may be approved on a case-by-case basis by the permitting authority. Certain site-specific operating permits ((typically for Class IA CAFOs (7000 animal units) that utilize a wet manure handling system) offer a reduced setback if the manure is sub-surface injected. Facility Separation Distances In Missouri, all Class I CAFOs must maintain a buffer distance between the nearest animal containment building or waste holding basin and any existing public building or occupied residence. The public building or occupied residence is considered existing if it is being used prior to the start of the neighbor notice requirements or 30 days prior to a construction permit application, whichever is later. Table 3- Missouri Separation Distances for Residences or Public Buildings. Size of Operation Setback Distance Class IA (7,000 or more AUs) 3,000 feet Class IB (3,000 to 6,999 AUs) 2,000 feet Class IC (1,000 to 2,999 AUs) 1,000 feet Additionally, confinement buildings and manure storage structures must maintain 300 feet from wells or water supply structures. Dry poultry litter storages need be only 100 feet from wells or water supply structures. A farm pond will be considered a water supply structure if it is the source of domestic water for the farm. Return to Step 2