The present trend of animal and dairy product producers is toward total confinement facilities and larger animal herds. Generally the rewards to the producer for these practices are higher economic returns which result from higher feeding efficiencies and better quality products. However, total confinement is not without problems that were previously not present or were minimal in nature when animals were maintained in fields. Confinement facilities have a greater impact on environmental quality of both water and air. Presently, one of the major problems facing animal and dairy product producers is odor production. The greatest number of complaints concerning environmental pollution from these facilities arise from odor complaints made by nearby neighbors, communities and passerby to the producers, the local health department, the state and federal environmental protection agencies, and the local prosecutors. Odor complaints may even come from the producers own family, farm workers or contract construction workers.
Taraba, J. L. and Williams, R. M., "Generation and Legal Regulation of Odors form Animal Manures" (1993). Agricultural Engineering Extension Updates. 17.