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 This website is no longer updated and links to external websites and some internal pages may not work.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 »

Inorganic Arsenic Emissions from Arsenic Trioxide and Metallic Arsenic Production Facilities: National Emission Standards for Hazardous Air Pollutants

On this page:

Rule Summary

This action promulgates national emission standards for hazardous air pollutants (NESHAP), specifically inorganic arsenic emissions, from a number of source categories. Those source categories include primary copper smelters, glass manufacturing plants, and arsenic plants.

Rule History

10/03/1986 - Correction.

08/04/1986 - Final rule.

12/16/1983 - Reopening of public comment period.

07/20/1983 - Propose rule and announcement of public hearing.