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.
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Once the EPA sets the NAAQS, states must submit "[s]tate implementation plans" that ensure compliance with the NAAQS for each criteria pollutant. (71) These plans are flexible and apply to both mobile and stationary sources of pollutants.
That petition asks EPA to make an endangerment finding for ammonia and designate ammonia as a criteria pollutant under the Clean Air Act.
percent of each criteria pollutant's emissions nationally.
(18.) The Center for Biological Diversity has, however, petitioned the agency to list carbon dioxide as a criteria pollutant. CTR.
Larger vessels will be able to transit the canal and take advantage of economies of scale in part to reduce C[O.sub.2] and criteria pollutant emissions associated with goods movement.
(In 2008, the NAAQS for another criteria pollutant, ozone, derived over 70 percent of its benefits from reductions in [PM.sub.2.5].
Thus, [[beta].sub.1] and [[beta].sub.2] are vectors of coefficients, estimating the nonattainment effects separately for each criteria pollutant. Greenstone (2002) highlights the importance of simultaneously assessing regulatory effects for all criteria pollutants; if nonattainment is only considered for one criteria pollutant in the model, this would incorrectly restrict the regulatory effects of nonattainment for other pollutants to zero.
the formation of a criteria pollutant (ozone) through chemical reactions