“Air Emissions and Animal Agriculture” a new online resource developed by Michigan State University Extension and Purdue Extension provides science-based information on food animal production in the United States and the odors and air emissions associated with livestock and poultry production.

To the general public the acronym “CAFO” is, for the most part, only a term used to reference any large livestock farm. Few realize the term “Concentrated Animal Feeding Operation” (CAFO) originated as a United States Environmental Protection Agency (US EPA) term for categorizing livestock farms by size, manure handling system and days on pasture.

To those rural residents not actively engaged in livestock/poultry production the odor associated with those farms may be the emission of greatest concern. A person’s perception of an odor depends on five characteristics: the odor’s intensity, degree of offensiveness, character, frequency and duration. Frequency and duration of odor events are most often the factors that trigger odor nuisance complaints