Provided below are maps and lists. Some of the pages are in Adobe PDF format and require the free Adobe Reader software to view.

• Alphabetical listing of all Class I refuges
• 11 x 8.5 map of Class I areas in Adobe PDF format (126 KB)
• 11 x 8.5 map of Class I refuges rated by pollution threat in Adobe PDF format (94 KB)
• FWS Class I boundary file in ArcView Shapefile format (743 kb, zipped)