Air Pollution Action Day in Chicago

The sun rises over Chicago on August 3, 2012.

August 3, 2012 7:02:06 AM PDT
State officials have issued an Air Pollution Action Day Alert for Friday for the Chicago metropolitan area.

The alert comes from the Illinois Environmental Protection Agency and Illinois Partners for Clean Air. Officials say regional air quality is expected to be "unhealthy for sensitive groups." This is the ninth action day for 2012.

Air quality monitoring and conditions show ozone levels will potentially be elevated on Friday and pose health hazards. Those particularly at risk include people with respiratory or pulmonary disorders and active children and adults.