A Nonattainment Area is a region in which the level of a Criteria Air Pollutant is higher than allowed by the federal NAAQS. For ground-level ozone, the one-hour standard is 120 parts per billion. EPA puts a city or metropolitan area on its "nonattainment" list when ozone exceeds, or violates, the standard more than once a year averaged over a three-year period.
List of books: Nonattainment,Area:
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| Criteria Pollutants | ■■■■■■ |
Criteria Pollutants are the 1970 amendments to the Clean Air Act required EPA to set National Ambient . . . Read More | |
| Air Toxics | ■■■■■ |
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| National Ambient Air Quality Standards (NAAQS): | ■■■■■ |
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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 | |
| Criteria | ■■■■■ |
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| Air Quality Standards | ■■■■■ |
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| Construction Ban | ■■■■■ |
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| Nonattainment | ■■■■■ |
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| Design Value | ■■■■ |
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