Cross State Air Pollution Rule

The Cross-State Air Pollution Rule and the Clean Air Interstate Rule

The Cross-State Air Pollution Rule (CSAPR) is a federal implementation plan to reduce the interstate transport of air pollutants across state boundaries.  The federal CSAPR programs replace the Clean Air Interstate Rule programs (CAIR). A December 2008 court decision kept the requirements of CAIR in place temporarily, but directed EPA to issue a new rule to implement the Clean Air Act requirements concerning interstate transport of air pollution. The CSAPR is designed to implement these Clean Air Act requirements and respond to the court's concerns. CSAPR takes effect January 1, 2015; CAIR will be implemented through the 2014 compliance periods, and then replaced by the CSAPR. 

Because the CAIR programs no longer exist, the Division of Air Quality intends to repeal the CAIR provisions set forth in 45CSR39, 45CSR40 and 45CSR41 during the 2016 session of the West Virginia Legislature.

For more information on CSAPR, use the following link:

Questions & Contact

For additional information and assistance regarding CSAPR programs in West Virginia, please contact Laura Crowder of the Division of Air Quality’s Planning Section:

Phone: (304) 926-0499 extension 1247
Fax: (304) 926-0479
Address​:  West Virginia Department of Environmental Protection
Division of Air Quality, 601 57th Street, Charleston, WV 25304

Updated October 2015