Agriculture and Ammonia Emissions

Although not listed as one of EPA's six regulated criteria air pollutants, ammonia also impacts our environment. Ammonia (NH3) deposition results in eutrophication, acid rain, and negatively impacts biodiversity.

Agriculture is one of the leading sources of NH3. Ammonia emissions from livestock come primarily from excess protein (nitrogen) fed in the diet. Any nitrogen not utilized for maintenance, growth, or milk production is excreted in the urine and feces. Inorganic nitrogen fertilizer is also a significant contributor of NH3 emissions.

Agriculture is not the only important source of NH3 in the U.S. Combustion from vehicles and industrial stacks are also significant sources of NOX and NH3.

For more information see, Agriculture and NH3 Emissions.