Department of Health and Human Services
Health Effects from Exposure to Odors
and Other Air Contaminants from
Hog Farm Operations
Odors associated with confinement buildings, lagoons and spray fields result from a combination of feces, urine and feed. Some of the odorous chemicals present in the livestock manure include volatile fatty acids (e.g., acetic, propionic, butanoic and pentanoic), phenol, p-cresol, and ammonia. These chemicals can irritate the respiratory tract, skin and eyes. Other air contaminants inside confinement buildings include feed particles, bacteria, fungi, endotoxins, grain mites and insect body parts.
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