The United States Department of Agriculture (USDA) defines a concentrated animal feeding operation (CAFO) as an intensive animal feeding operation (AFO) in which over 1000 animal units are confined for over 45 days a year.
Missouri Senate Bill 391 made it more difficult for local governments to block CAFOs.
SB 391 was signed into law in 2019 and prohibits counties within the state of Missouri from implementing health ordinances that restrict activities or impose standards on AFOs and CAFOs that are stricter than state requirements.
