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National Ambient Air Quality Standards
The National Ambient Air Quality Standards (NAAQS) are standards established by the United States Environmental Protection Agency that apply for outdoor air throughout the country. Primary standards are designed to protect human health, with an adequate margin of safety, including sensitive populations such as children, the elderly, and individuals suffering from respiratory disease. Secondary standards are designed to protect public welfare from any known or anticipated adverse effects of a pollutant(e.g. building facades, visibility, crops, and domestic animals).
Additional recommended knowledge
NAAQS requires the EPA to set standards on six criteria air contaminants:
Note a: Each standard has its own criteria for how many times it may be exceeded, in some cases using a three year average.
Note b: As of June 15, 2005, the 1-hour ozone standard no longer applies to areas designated with respect to the 8-hour ozone standard (which includes most of the United States, except for portions of 10 states).
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "National_Ambient_Air_Quality_Standards". A list of authors is available in Wikipedia.|