Final Fine Particle Pollution De Minimis Threshold Rates for General Conformity Applicability

July 11, 2006 - EPA established "de minimis" emissions threshold rates for fine particle pollution. These emissions rates will be used to determine whether a project applies under EPA's General Conformity regulations.

You may want to view a listing of de minimis emissions threshold rates for each criteria pollutant.

• PM2.5 De Minimis Emission Levels for General Conformity Applicability (pdf) (92.15 KB, July 17, 2006, 40CFR Pts 51 and 93)
• Fact Sheet: Final Fine Particle Pollution De Minimis Emission Levels for General Conformity Applicability (pdf) (29.62 KB, July 2006)