North Carolina Counties with 8-Hour Ozone Violations 2009-2011

A map of North Carolina counties with 8 hour ozone violations from 2009 to 2011.

Table 1. The following table shows 2 counties with a 3-year average of the annual 4th high value for each year equaling 0.076 ppm level or higher (violation of the 8-hour standard). The first column lists the county; the second lists the average value for that county.

CountyAverage value
Mecklenburg0.079 ppm
Rowan0.076 ppm

Table 2. The following table shows 28 monitored counties that are attaining the 0.076 ppm standard. The first column lists the county; the second lists the average value for that county.

CountyAverage Value
Alexander0.067 ppm
Avery0.064 ppm
Buncombe0.067 ppm
Caldwell0.067 ppm
Caswell0.070 ppm
Chatham0.066 ppm
Cumberland0.071 ppm
Durham0.070 ppm
Edgecombe0.070 ppm
Forsyth0.075 ppm
Franklin0.069 ppm
Graham0.071 ppm
Granville0.071 ppm
Guilford0.074 ppm
Haywood0.070 ppm
Jackson0.067 ppm
Johnston0.071 ppm
Lenoir0.067 ppm
Lincoln0.071 ppm
Martin0.066 ppm
New Hanover0.062 ppm
Person0.070 ppm
Pitt0.069 ppm
Rockingham0.071 ppm
Swain0.062 ppm
Union0.070 ppm
Wake0.073 ppm
Yancey0.070 ppm

Note:

  • Additional counties may be involved in emission reduction strategies
  • Nonattainment designations may not follow county boundaries
  • Final data validation is not yet complete