Class I Areas (Air Quality)

What is Class I Areas (Air Quality)?

Class I Areas (Air Quality) meaning in Safety terms is

  • Geographic areas designed by the Clean Air Act subject to the most stringent restrictions on allowable increment of air quality deterioration. Class I areas include Forest Service wildernesses and nation memorial parks over 5,000 acres, National Parks exceeding 6,000 acres, international parks, as well as other designated lands. 


reference: Glossary A – Z | National Wildfire Coordinating Group