National ambient air quality standards

(redirected from Criteria Air Pollutants)

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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References in periodicals archive ?
The last publication in 2008 documented the paint and coatings industry's decrease in overall air emissions, release of criteria air pollutants, water use and discharge, and waste generation.
This study was conducted to assess the seasonal and temporal variations of criteria air pollutants and evaluating the correlations of criteria air pollutants with meteorological parameters in the city of Lahore, Pakistan.
On the corresponding web page [8] we read the following description: "The AQHI of the current hour is calculated from the sum of the percentage excess risk of daily hospital admissions attributable to the 3-h moving average concentrations of 4 criteria air pollutants: ozone, nitrogen dioxide, sulphur dioxide, and particulate matter (including [PM.sub.10] and [PM.sub.2.5] whichever has a higher risk) measured at each air quality monitoring station of the Environmental Protection Department."
Energy production and reductions in criteria air pollutants and GHG emissions were quantified from utilization of forest woody biomass wastes to fuel electricity generation as an alternative to open pile burning.
"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.
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."
There are five primary paths through which EPA could address greenhouse gases under the Clean Air Act: (1) to regulate GHGs as criteria air pollutants, (2) to regulate GHGs as hazardous air pollutants, (3) to regulate GHGs as designated air pollutants, (4) to regulate under the international pollution provisions of Section 115, or (5) to regulate under the stratospheric ozone provisions of Title VI.
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.
"There has been a big reduction in the levels of criteria air pollutants like ozone and carbon monoxide over the years," Ritz said.
Major findings highlighted in the report include declines during the 1990s in the percentage of children living in areas where one or more criteria air pollutants exceeded national standards, and declines in the percentage of children in areas where drinking water standards for contaminants were exceeded.