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Air Pollution Information

Illinois is one of a number of states under federal mandate to reduce overall nitrogen oxide (NOx) emissions. Illinois had adopted NOx emissions trading programs, first the NOx SIP Call program, then the Clean Air Interstate Rule (CAIR) program. The purpose of these programs is to reduce NOx emissions using a market-based cap and trade program.

CAIR NOx Trading Program

This program applies to emissions of NOx from Electrical Generating Units (EGUs) over 25 MWe during the ozone season and annually beginning in 2009. This program replaces the EGU portion of the NOx SIP Call program.

 

NOx SIP Call Trading Program

This program applies to emissions of NOx from EGUs and large industrial boilers and turbines whose primary purpose is to generate process steam rather than electricity (non-EGUs) during the ozone season beginning in 2004. The NOx SIP call trading program was replaced with CAIR January 1, 2009 (see above). While CAIR addresses EGUs only, the NOx SIP call also ended for non-EGUs at the same time.

Air Menu

About the Bureau of Air
Forms
Publications
Annual Emission Report (AER)
Air Quality Information
AirFacts
Vehicle Emissions Testing
Partners for Clean Air
Permitting of Air Pollution Sources
Open Burning Permits
Emissions Reduction Market System (ERMS)
Asbestos Program
Other Bureau of Air Programs
NOx SIP Call and CAIR NOx Trading Programs
Illinois Green Fleets
MACT Training
Regulatory Development of Key Rules (CAIR/Mercury)
Illinois Climate Change Advisory Group
Registration of Smaller Sources (ROSS)
Small Business Environmental Assistance Program
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