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Mandatory Class 1 Federal Areas Download Package

Published by U.S. EPA Office of Air and Radiation (OAR) - Office of State Air Partnerships (OSAP) | U.S. Environmental Protection Agency | Catalog Last Checked: July 08, 2026 at 05:22 PM | Dataset Last Updated: September 22, 2015 at 12:00 AM
This downloadable package contains the following layers: Mandatory Class 1 Federal Area polygons in the United States. Included in this package are a file geodatabase, Esri ArcMap map document and an XML file of this metadata record. This dataset was developed by EPA's Office of State Air Partnerships (OSAP) based on features originating from several data sources, including USEPA, USFS, USFWS, NPS and BIA.

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