On Febuary 29, 2012, North Carolina submitted the amended boundary recommendation for the 2008 8-hour ozone standard to the Environmental Protection Agency (EPA).

The EPA notified Governor Perdue on December 8, 2011 that they intend to support North Carolina’s recommended designation and boundary for the Charlotte-Gastonia-Salisbury (CGS) area. The EPA also stated that it would work with the State on the appropriate boundary.

North Carolina has counter-recommended that all of Mecklenburg County and portions of Cabarrus, Gaston, Iredell, Lincoln, Rowan, and Union counties in the CGS metropolitan area be designated as nonattainment for the 2008 8-hour ozone standard and that all remaining areas in North Carolina be designated as attainment.

The amended boundary of the CGS metropolitan area is smaller than the 1997 8-hour ozone standard boundary. This is supported by the fact that not all of the monitors in the metropolitan area are in violation of the 2008 8-hour ozone standard, whereas when the area was designated for the 1997 standard, all monitors were in violation.

The amended boundary map can be found by clicking here. Furthermore, all other information regarding the February 29, 2012 submittal can be found by clicking here, including the submitted recommendation narrative and appendices at the bottom of the page.