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The Air Quality Index is a guide for reporting daily air quality. It uses colors and numbers to show how clean or polluted the air is. The Flag Program uses brightly colored flags based on the U.S. EPA’s Air Quality Index (AQI) to notify people and their communities about outdoor air quality conditions. Metuchen High School will raise a flag each day that corresponds to their local air quality forecast. The flags can be seen on the flag pole in front of the school or on a widget on the high school webpage.