Prevention of Significant Deterioration (PSD) (Sec 160-169B)

The PSD program, codified in sections 160-169B of the Clean Air Act (42 U.S.C. 7401 et seq.), sets permitting requirements for major new or modified sources in areas that already meet National Ambient Air Quality Standards, ensuring any increase in emissions does not cause significant deterioration of air quality. This entry is indexed under the code "psd."