AFO/CAFO

AFO/CAFO

used in the USA to designate and define an animal feeding operation (AFO) from a confined animal feeding operation (CAFO), the distinction being of considerable importance in terms of regulatory input by the federal Environmental Protection Agency (EPA) and State Departments of Ecology. The distinction and definition is complicated but a CAFO is defined as a facility with more than 1000 animal units confined on a site for more than 45 days. Any sized AFO that discharges manure or wastewater into a natural or man-made ditch, stream or other waterway is defined as a CAFO. Animal equivalents for 1000 Animal Units are: beef - 1000 head; dairy - 700 head; swine - 2500 pigs weighing more than 55 lbs; poultry - 125,000 broilers or 82,000 laying hens or pullets.