Air Quality

On April 15, 2004, the U.S. Environmental Protection Agency (EPA) designated the counties of Anderson, Blount, Jefferson, Knox, Loudon, Sevier, and a portion of Cocke within the Great Smoky Mountains National Park in “basic” non-attainment of the 8-hour standard for ground level ozone. There area must meet air quality standards for ozone by June 2009. On December 17, 2004 , EPA designated Anderson , Blount, Knox, Loudon, and a portion of Roane County in non-attainment of the fine particulate matter (PM 2.5) standard. The area must meet air quality standards for PM 2.5 by April 2010.

A large portion of the Non-Attainment Area is outside of the currently designated TPO Planning Area. As a result of these designations, the TPO has entered an agreement with the Tennessee Department of Transportation to conduct long range transportation planning and transportation conformity for the entire non-attainment area through 2008 and thus created the Regional Transportation Planning Council to assist the TPO in regional transportation planning. In conducting regional transportation planning, the TPO must develop and update a Long Range Transportation Plan and Transportation Improvement Program for the entire area showing that the projects proposed in non-attainment counties will not result in additional emissions that will worsen air quality.

The 2005-2030 Knoxville Regional Long Range Transportation Plan was adopted by the TPO Executive Board and Regional Transportation Planning Council on April 11, 2005 . The plan includes a multi modal plan and transportation conformity determination for the entire ozone non-attainment area. The Plan must be updated in April 2006 for PM 2.5 standards. More information on regional air quality can be found at Regional Clean Air Coalition website.

Air Quality Conformity Determination

Knoxville Ozone Non-Attainment Area

Knoxville PM 2.5 Non-Attainment Area