National ambient air quality standards Federal standards for the minimum ambient air quality needed to protect public health and welfare.
Nitrogen oxides All oxides of nitrogen except nitrous oxide.
National Ambient Air Quality Standards (NAAQS) - Sets the levels of air quality for the United States , in the Code of Federal Regulations (40 CFR ß50.2), to protect the population's health.
National Ambient Air Quality Standards (NAAQS) - health-based pollutant concentration limits established by EPA that apply to outside air (see Criteria Pollutants) ...
National Ambient Air Quality Standards (NAAQS)
Standards established by the US Environmental Protection Agency that apply for outside air throughout the country.(1) ...
National Ambient Air Quality Standards (NAAQS): Standards established by the United States EPA that apply for outdoor air throughout the country. There are two types of NAAQS.
National Ambient Air Quality Standards (NAAQS)
National Emissions Standards for Hazardous Air Pollutants (NESHAPS)
National Environmental Performance Partnership Agreements
National Estuary Program
National Municipal Plan ...
National 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; ...
Primary Standards- National ambient air quality standards designed to protect human health with an adequate margin for safety.
Air Toxics Any air pollutant for which a National Ambient Air Quality Standard (NAAQS) does not exist that may reasonably be anticipated to cause serious or irreversible chronic or acute health effects in humans.
National Ambient Air Quality Standards or NAAQS Under the US Clean Air Act, the Environmental Protection Agency (EPA) must establish National Ambient Air Quality Standards to identify pollutants that can harm human health and the environment.
Criteria Air Pollutants - The 1970 amendments to the Clean Air Act required EPA to set National Ambient Air Quality Standards for certain pollutants known to be hazardous to human health.
Attainment Area: An area considered to have air quality as good as or better than the national ambient air quality standards as defined in the Clean Air Act. An area may be an attainment area for one pollutant and a non-attainment area for others.
Class I Area Under the Clean Air Act, an area in which visibility is protected more stringently than under the national ambient air quality standards; includes national parks, wilderness area, ...
traveled increased 171 percent, energy consumption rose 47 percent, and population increased 40 percent. Despite this progress, in 2002, 146 million people lived in U.S. counties with pollution levels above at least one of the National Ambient Air ...
 See also: Ambient air, Air quality, Air, National, Standards
  
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