An emission standard is a limit put on the quantity of pollutants that can be emitted by a given source, or in a given area.
Source: U.S. Environmental Protection Agency. 1999. Handbook for criteria pollutant inventory development: a beginner's guide for point and areas sources. EPA-OAQPS-454-99-037. Research Triangle Park, NC. U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards. As cited in: Hardy, Colin C., Ottmar, Roger D., Peterson, Janice L., Core, John E., and Seamon, Paula. 2001. Smoke Management Guide for Prescribed and Wildland Fire 2001 Edition. Produced by the National Wildfire coordinating Group Fire Use Working Team.