air quality standards


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air quality standards

A general term for the standards of air quality (concentration of pollutants for an average length of time) set by the Environmental Protection Agency or equivalent body in a particular country. In the US, the standards are based on the concentration of 5 ambient air pollutants (SO2, particulate matter, carbon monoxide, ozone, and NO2).
References in periodicals archive ?
Environmental Protection Agency (EPA) is taking the next steps in the Clean Air Act process to determine which areas of the country meet national air quality standards for ground-level ozone and sulfur dioxide.
In May, a federal court rejected industry challenges to EPA's new air quality standards.

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