Cross-State Air Pollution

Good Neighbor Plan

EPA’s final Good Neighbor Plan for the 2015 ozone NAAQS will improve air quality, saving lives and improving public health in smog-affected communities across the United States.

Cross-state air pollution, also known as interstate air pollution or transported air pollution, is emitted at one location (upwind) and then blown by wind to another location (downwind). Learn more about Cross-State Air Pollution and how EPA's programs address it.