What is aqi index?

An air quality index is used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become. The air quality index (AQI) is an index for reporting air quality on a daily basis. The AQI is an index for reporting daily air quality. An air quality index (AQI) is used by government agencies to communicate to the public how polluted the air currently is or how polluted it is forecast to become. How polluted is the air today? Check out the real-time air pollution map, for more than 80 countries.