The U.S. EPA AirNow program (www.AirNow.gov) provides real-time air quality data from over 2000 monitoring stations across USA.
Official regulatory air quality data must be obtained from EPA's Air Quality System (AQS or AirData).
This project consumes different API provided by AirNow and create data stream using PubNub client. (More Info Coming...)
The U.S. Environmental Protection Agency’s (EPA)