Earth Day: Air

Developed by the U.S. EPA, NOAA, NPS, tribal, state, and local agencies developed the AIRNow provides the public with easy access to national air quality information, offering daily AQI forecasts as well as real-time AQI conditions for over 300 cities across the US, and providing links to more detailed State and local air quality Web sites.

This EPA site provides links to information about specific air pollutants.

Table - on the EPA site. Lists National Ambient Air Quality Standards (NAAQS) for six principal pollutants - "criteria" pollutants.

From WSB-TV, Ch. 2

Daily forecast for Atlanta - from the GA Environmental Protection Division