Criteria Air Pollutants

 
Learn how EPA sets, reviews and revises standards (primary standardsHelpprimary standardsNational ambient air quality standards designed to protect human health with an adequate margin for safety. and secondary standardsHelpsecondary standardsNational ambient air quality standards designed to protect welfare, including effects on soils, water, crops, vegetation, man-made (anthropogenic) materials, animals, wildlife, weather, visibility, and climate; damage to property; transportation hazards; economic values, and personal comfort and well-being.),  standardsNational ambient air quality standards designed to protect welfare, including effects on soils, water, crops, vegetation, man-made (anthropogenic) materials, animals, wildlife, weather, visibility, and climate; damage to property; transportation hazards; economic values, and personal comfort and well-being.determines whether areas meet the standards, and works with areas to attain and maintain the standards.