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Table 1. The following table shows 28 counties with a 3-year average of the annual 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 |
14.1 µg/m3 |
| Buncombe |
12.7 µg/m3 |
| Caswell |
13.2 µg/m3 |
| Chatham |
11.9 µg/m3 |
| Cumberland |
13.8 µg/m3 |
| Duplin |
11.5 µg/m3 |
| Durham |
13.6 µg/m3 |
| Edgecombe |
12.2 µg/m3 |
| Forsyth |
14.4 µg/m3 |
| Gaston |
14.3 µg/m3 |
| Guilford |
13.8 µg/m3 |
| Haywood |
13.0 µg/m3 |
| Jackson |
12.0 µg/m3 |
| Lenoir |
11.3 µg/m3 |
| Martin |
11.3 µg/m3 |
| McDowell |
14.1 µg/m3 |
| Mitchell |
12.6 µg/m3 |
| Montgomery |
12.2 µg/m3 |
| New Hanover |
10.0 µg/m3 |
| Onslow |
11.3 µg/m3 |
| Orange |
13.2 µg/m3 |
| Pitt |
11.9 µg/m3 |
| Robeson |
12.8 µg/m3 |
| Rowan |
14.2 µg/m3 |
| Swain |
12.7 µg/m3 |
| Wake |
13.5 µg/m3 |
| Watauga |
12.1 µg/m3 |
| Wayne |
13.2 µg/m3 |
Table 2. The following table shows 3 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 |
15.3 µg/m3 |
| Davidson |
15.2 µg/m3 |
| Mecklenberg |
15.3 µg/m3 |
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