PM 2.5 Inventory Resource Center
National Ambient Air Quality Standards (NAAQS) and Haze

NAAQS

• What are NAAQS?
• Background and Final Revisions to the Ozone and Particulate Matter Air Quality Standard

Effects of PM2.5

• Fact Sheet on PM
• Health Effects and Environmental Impact of PM

Regional Haze

• EPA's Regional Haze Program
• Current Ozone and Weather Data in National Parks
• Regional Haze and Visibility in the Northeast and Mid-Atlantic States (NESCAUM)
• Mid-Atlantic Regional Air Management Association (MARAMA)
  
• Western Regional Air Partnership (WRAP)

Effects of Haze

• National Park Service Web Cameras
• Visibility Illustration Photo- Great Smokey Mountains National Park
• Grand Canyon Visibility Transport Commission: Recommendations for Improving Western Vistas
• Regional Haze in National Parks, National Parks Conservation Association