An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Delegations of New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) in the Pacific Northwest

The EPA may delegate the authority to implement and enforce certain federal regulations to state agencies and local air pollution control authorities. NSPS (in 40 CFR part 60) and NESHAP (in 40 CFR parts 61 and 63) establish nationwide requirements to control emissions of air pollution from a wide range of commercial and industrial activities.    

This information is provided for reference purposes only. Please contact your air permitting authority and/or the EPA regional office if you have any questions about the applicability or implementation of any NSPS or NESHAP.