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The following table shows 28 counties with a 3-year average of theannual mean PM2.5 for each year below the established standard. The first column lists the county; the second lists the average value for that county.
| County |
Average value |
| Alamance |
13.7 µg/m3 |
| Buncombe |
13.0 µg/m3 |
| Cabarrus |
14.5 µg/m3 |
| Caswell |
13.3 µg/m3 |
| Chatham |
12.2 µg/m3 |
| Cumberland |
13.8 µg/m3 |
| Duplin |
11.9 µg/m3 |
| Durham |
13.9 µg/m3 |
| Edgecombe |
12.6 µg/m3 |
| Forsyth |
14.6 µg/m3 |
| Gaston |
14.0 µg/m3 |
| Guilford |
14.0 µg/m3 |
| Haywood |
13.6 µg/m3 |
| Jackson |
12.4 µg/m3 |
| Lenoir |
11.5 µg/m3 |
| McDowell |
14.2 µg/m3 |
| Mecklenburg |
14.9 µg/m3 |
| Mitchell |
13.4 µg/m3 |
| Montgomery |
12.1 µg/m3 |
| New Hanover |
9.6 µg/m3 |
| Onslow |
11.1 µg/m3 |
| Orange |
13.1 µg/m3 |
| Pitt |
12.4 µg/m3 |
| Robeson |
12.7 µg/m3 |
| Swain |
12.9 µg/m3 |
| Wake |
13.8 µg/m3 |
| Watauga |
11.7 µg/m3 |
| Wayne |
13.7 µg/m3 |
The following table shows 2 counties with a 3-year average of the annual mean PM2.5 for each year above the established standard. The first column lists the county; the second lists the average value for that county.
Note:
- Additional counties may be involved in emission reduction strategies
- Nonattainment designations may not follow county boundaries
| County |
Average value |
| Catawba |
15.5 µg/m3 |
| Davidson |
15.8 µg/m3 |
The following table shows 2 counties that were monitored in 2003 but did not have a complete and valid 3-year average of the annual mean PM2.5 that could be compared to the established standard.
| County |
Average value |
| Martin |
N/A µg/m3 |
| Nash |
N/A µg/m3 |
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