Definitions for "NAAQS"
National Ambient Air Quality Standards. Nationwide air quality standards established by the U.S. Environmental Protection Agency (EPA) that apply to air outside buildings.
ational mbient ir uality tandard, an ambient air concentration that EPA has established to characterize air quality. The standards are health-based and were designed to be protective of many sensitive populations, such as people with asthma and children. The standards have been developed only for a small subset of pollutants, and the averaging time and statistical interpretations of the standards vary among the regulated pollutants.
Natioanal Ambient Air Quality Standards Title I