Criteria Pollutants are 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. EPA has identified and set standards to protect human health and welfare for six pollutants: ozone, carbon monoxide, total suspended particulates, sulfur dioxide, lead, and nitrogen oxide. The term, "Criteria Pollutants" derives from the requirement that EPA must describe the characteristics and potential health and welfare effects of these pollutants. It is on the basis of these criteria that standards are set or revised.

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Criteria pollutant ■■■■■■■■■■
A Criteria pollutant is a pollutant determined to be hazardous to human health and regulated under EPA's . . . Read More
National Ambient Air Quality Standards (NAAQS): ■■■■■■■■■■
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Criteria air contaminants ■■■■■■■■■
Criteria air contaminants: Criteria air contaminants (CACs) means Emissions of criteria air contaminants . . . Read More
Ambient ■■■■■■■■
An ambient is pertaining to the Current Environmental condition. It means surrounding, or on all sides . . . Read More
Acid ■■■■■■■■
An Acid is a Corrosive solution with a pH less than 7 Description Acid in the environment refers to the . . . Read More
Vehicle ■■■■■■■
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Concentration ■■■■■■■
A Concentration is the relative amount of a substance mixed with another substance. An example is five . . . Read More
Greenhouse effect ■■■■■■■
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Pollution ■■■■■■■
A Pollution is the Clean Water Act (_502.19) defines Pollution as "the [hu]man-made or [hu]man-induced . . . Read More
Designated Pollutant ■■■■■■■
A Designated Pollutant is an Air Pollutant which is neither a Criteria nor hazardous pollutant, as described . . . Read More