National ambient air quality standards

(redirected from Criteria pollutant)

National ambient air quality standards

The standards established by the EPA (Environmental Protection Agency) that apply to outdoor air throughout the country.
References in periodicals archive ?
3) Generated primarily from vehicle exhaust, but also by power plants and heavy equipment, the compound causes a variety of adverse respiratory effects and contributes to the formation of ozone, another harmful criteria pollutant.
That petition asks EPA to make an endangerment finding for ammonia and designate ammonia as a criteria pollutant under the Clean Air Act.
The Center for Biological Diversity has, however, petitioned the agency to list carbon dioxide as a criteria pollutant.
2] and criteria pollutant emissions associated with goods movement.
As stated in the agency's Regulatory Impact Assessment, "In addition to the GHG impacts laid out in Chapter 2, we project that the increased use of renewable fuels required by [the new standard] will affect emissions of 'criteria' pollutants (those pollutants for which a National Ambient Air Quality Standard [NAAQS] has been established), criteria pollutant precursors, and air toxics.
Localities failing to meet the NAAQS for a particular criteria pollutant over a three-year period are subject to classification as a nonattainment area.
the formation of a criteria pollutant (ozone) through chemical reactions
This approach is consistent with how regulatory agencies have traditionally evaluated the benefits of reducing criteria pollutant emissions.
This rule will limit diesel particulate matter and criteria pollutant emissions from in-use on-road diesel vehicles owned by private fleets.
There will continue to be a national network of monitors for each criteria pollutant, but the improved network will be more strategic and more efficient.