National ambient air quality standards

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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 ?
We applaud American DG Energy's effort because the improvement in efficiency translates to a reduction in total fossil fuel use, reduced emissions of criteria air pollutants and carbon dioxide, the leading greenhouse gas contributor to global climate change.
The 2008 issue is the third biannual report released and the paint and coatings industry is documented as continuing to decrease its overall air emissions, release of criteria air pollutants, water use and discharge, and waste generation.
Major sources, which emit or have a potential to emit 100 tons or more of criteria air pollutants, require permits issued by state and local permitting authorities as prescribed by Title V of the 1990 Amendments to the CAA.
Ozone is one of several criteria air pollutants considered highly toxic in large quantities.
There has been a big reduction in the levels of criteria air pollutants like ozone and carbon monoxide over the years," Ritz said.
Despite population growth and a juggernaut economy, emissions of criteria air pollutants fell 29 percent over the past three decades.
To be able to process more Texas crude, we need new processing capabilities - and we can do that with a net decrease in refinery emissions of traditional criteria air pollutants," Gaarder said.
These estimates were based on damages to human health, grain crop and timber yields, building materials, and recreation by criteria air pollutants including particulate matter, sulfur dioxide, and nitrogen oxides.
These investments have substantially reduced emissions of criteria air pollutants (NOX, SO2, particulate matter) from the coal-based electricity sector.
Under the Clean Air Act, EPA established air quality standards for six criteria air pollutants (ozone, carbon monoxide, nitrogen dioxide, sulfur dioxide, particulate matter and lead) and is directed to review the standards every five years.
ICF has supported this office in developing risk assessment methods for hazardous air pollutants and implementing those methods in conducting residual risk assessments of numerous source categories, conducting exposure and risk assessments for all six criteria air pollutants in support of EPA's reviews of National Ambient Air Quality Standards, developing assessment methods and providing modeling support for EPA's National-scale Air Toxics Assessment (NATA), assisting EPA in the development of several reports to Congress, and supporting EPA's public outreach programs and health communications initiatives.