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Mandatory Class 1 Federal Areas Download Package

Published by U.S. EPA Office of Air and Radiation (OAR) - Office of Air Quality Planning and Standards (OAQPS) | U.S. Environmental Protection Agency | Metadata Last Checked: January 27, 2026 | Last Modified: 2015-09-22T00:00:00.000+00:00
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 Air Quality Planning and Standards (OAQPS) based on features originating from several data sources, including USEPA, USFS, USFWS, NPS and BIA.

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