North Carolina Counties with 8-Hour Ozone Violations 2004-2006

A map of North Carolina counties with 8 hour ozone violations from 2004 to 2006.

Table 1. The following table shows two counties with a 3-year average of the annual 4th high value for each year equaling 0.085 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
Mecklenburg0.088 ppm
Rowan0.085 ppm

Table 2. The following table shows three counties apparently attaining the standard, but with insufficient data for a proper design value average due to either monitor relocations or inadequate data collection during the 3-year interval. The first column lists the county; the second lists a surrogate average value for that county.

CountyAverage Value
Guilford0.081 ppm
Jackson0.073 ppm
Yancey0.075 ppm

Table 3. The following table shows 26 monitored counties that are attaining the 0.085 ppm standard. The first column lists the county; the second lists the average value for that county.

CountyAverage Value
Alexander0.070 ppm
Avery0.069 ppm
Buncombe0.074 ppm
Caldwell0.073 ppm
Caswell0.075 ppm
Chatham0.072 ppm
Cumberland0.080 ppm
Davie0.079 ppm
Durham0.076 ppm
Edgecombe0.075 ppm
Forsyth0.080 ppm
Franklin0.077 ppm
Graham0.078 ppm
Granville0.080 ppm
Haywood0.078 ppm
Johnston0.076 ppm
Lenoir0.073 ppm
Lincoln0.079 ppm
Martin0.074 ppm
New Hanover0.072 ppm
Person0.076 ppm
Pitt0.075 ppm
Rockingham0.075 ppm
Swain0.065 ppm
Union0.078 ppm
Wake0.078 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