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The following table shows 3 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.
| County |
Average value |
| Granville |
0.085 ppm |
| Mecklenburg |
0.087 ppm |
| Rowan |
0.088 ppm |
The following table shows one county with insufficient data to declare nonattainment, due to changing the monitor location in 2004. The first column lists the county; the second lists an unbiased surrogate estimate of the average value for that county.
| County |
Average Value |
| Alexander |
0.074 ppm |
The following table shows 27 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.
| County |
Average value |
| Avery |
0.072 ppm |
| Buncombe |
0.074 ppm |
| Caldwell |
0.074 ppm |
| Caswell |
0.077 ppm |
| Chatham |
0.074 ppm |
| Cumberland |
0.083 ppm |
| Davie |
0.082 ppm |
| Durham |
0.078 ppm |
| Edgecombe |
0.079 ppm |
| Forsyth |
0.079 ppm |
| Franklin |
0.081 ppm |
| Graham |
0.079 ppm |
| Guilford |
0.077 ppm |
| Haywood |
0.078 ppm |
| Jackson |
0.072 ppm |
| Johnston |
0.079 ppm |
| Lenoir |
0.077 ppm |
| Lincoln |
0.081 ppm |
| Martin |
0.077 ppm |
| New Hanover |
0.073 ppm |
| Person |
0.079 ppm |
| Pitt |
0.077 ppm |
| Rockingham |
0.078 ppm |
| Swain |
0.068 ppm |
| Union |
0.079 ppm |
| Wake |
0.083 ppm |
| Yancey |
0.076 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
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