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Air Quality

South Carolina 1997 8-Hour Ozone Attainment Demonstration
Charlotte-Gastonia-Rock Hill, North Carolina-South Carolina (Metrolina) State Implementation Plan (SIP)

On April 30, 2004, the U.S. Environmental Protection Agency (EPA) issued designations for the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS). Although the monitor in York County, South Carolina was meeting the 1997 8-hour ozone NAAQS, EPA decided that the portion of York County, South Carolina within the Rock Hill-Fort Mill Area Transportation Study (RFATS) Metropolitan Planning Organization (MPO) should be part of the Metrolina nonattainment area due to its proximity to Charlotte. The area was classified under Subpart 2 of the Clean Air Act, as amended, (CAA) as a "moderate" nonattainment area for ozone.

DHEC completed submittal of an amendment to the State Implementation Plan (SIP) on August 31, 2007, which demonstrated that the Metrolina nonattainment area, including the affected portion of York County, would attain the 1997 ozone standard by the end of 2009 and meet the attainment date of June 15, 2010.

In late 2008, after further review of the South Carolina and North Carolina attainment demonstrations and air quality data from the 2007 and 2008 ozone seasons, EPA concluded that the Metrolina nonattainment area would be unable to meet the attainment date of June 15, 2010. As a result, EPA sent South Carolina and North Carolina letters on November 17, 2008, stating it intended to disapprove both states' attainment demonstrations for the 1997 8-hour ozone NAAQS by January 9, 2009, unless the states requested voluntary reclassification from a "moderate" nonattainment area to "serious."

Withdrawal of portions of the 1997 8-hour Ozone Attainment Demonstration for the Metrolina nonattainment area (January 12, 2012)

Supplement to the South Carolina 8-Hour Ozone Attainment Demonstration (April 29, 2010)

South Carolina 8-Hour Ozone Attainment Demonstration State Implementation
Plan (April 29, 2010)


Appendix G - Quality Assurance of the Emissions Inventories

Appendix M 2 - Adopted State Control Measures

For more information please contact the Bureau of Air Quality at (803) 898-4123 or by email.