A geographic area identified by theUS EPAand/orARBas not meeting eitherNAAQSorCAAQSstandards for a given pollutant. For more information, visit ourdesignated areaswebsite
California Air Resources Board ARB (California Environmental Protection Agency), glossary of air pollution terms, Sacramento, CA, USA 2013. http://www.arb.ca.gov/html/gloss.htm, (Air Pollut - Amer) {594}