- National Ambient Air Quality Standards
National Ambient Air Quality Standards (NAAQS)USAStandards for outdoor air quality in the US created through the Environmental Protection Agency's authority under the Clean Air Act. Primary standards limit pollutants to protect public health, particularly of sensitive populations like the elderly, children and asthmatics. Secondary standards are designed to protect the public welfare, for example by preventing damage to structures, vegetation, crops, animals and visibility.
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National Ambient Air Quality Standards — Counties in the United States where one or more National Ambient Air Quality Standards are not met, as of June 2007. The National Ambient Air Quality Standards (NAAQS) are standards established by the United States Environmental Protection Agency … Wikipedia
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