What are de minimis emission levels?
Under the existing regulations, de minimis emission levels are listed for each criteria pollutant. Annual emission rates per calendar year are used. You may want to view a listing of de minimis emission levels for each criteria pollutant. In creating the de minimis emission levels, EPA sought to limit the need to conduct conformity determinations for actions with minimal emission increases. When the total direct and indirect emissions from the project/actions are below the de minimis levels, the project/action would not be subject to a conformity determination.
