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Historical Regulations Impacting Cross-State Air Pollution

States and EPA have a long history of implementing the good neighbor provision, including developing and implementing regulations that preceded the current Cross-State Air Pollution Rule (CSAPR) and Good Neighbor Plan programs. These programs achieved important emission reductions and air quality improvements to help states meet older National Ambient Air Quality Standards (NAAQS). These historical programs also helped shape the current programs.

Clean Air Interstate Rule (2009 - 2014) (Search EPA’s Archive for this document)
NO_X Budget Trading Program (2003 - 2009)
Ozone Transport Commission (OTC) NOx Budget Program (1999-2002)