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The following table shows 11 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. Some entries have an additional comment indicating the design value given is based on incomplete data.
| County |
Average value |
Additional comment |
| Alamance | 14.6 µg/m3 |
|
| Buncombe | 14.4 µg/m3 |
at least one calendar quarter was not valid |
| Caswell | 14.5 µg/m3 |
at least one calendar quarter was not valid |
| Chatham | 13.4 µg/m3 |
at least one calendar quarter was not valid |
| Duplin | 12.6 µg/m3 |
|
| Lenoir | 12.3 µg/m3 |
|
| New Hanover | 12.2 µg/m3 |
|
| Onslow | 12.1 µg/m3 |
|
| Orange | 14.3 µg/m3 |
|
| Pitt | 13.7 µg/m3 |
at least one calendar quarter was not valid |
| Swain | 14.1 µg/m3 |
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The following table shows 14 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. Some entries have an additional comment indicating the design value given is based on incomplete data.
Note: Nonattainment designations may not follow county boundaries and will be based on later data than are shown in this table.
| County |
Average value |
Additional comment |
| Cabarrus | 15.6 µg/m3 |
|
| Catawba | 17.0 µg/m3 |
at least one calendar quarter was not valid |
| Cumberland | 15.4 µg/m3 |
|
| Davidson | 17.3 µg/m3 |
at least one calendar quarter was not valid |
| Durham | 15.3 µg/m3 |
|
| Forsyth | 16.1 µg/m3 |
|
| Gaston | 15.3 µg/m3 |
|
| Guilford | 16.3 µg/m3 |
|
| Haywood | 15.2 µg/m3 |
|
| McDowell | 15.8 µg/m3 |
|
| Mecklenburg | 16.6 µg/m3 |
|
| Mitchell | 15.3 µg/m3 |
|
| Wake | 15.3 µg/m3 |
|
| Wayne | 15.3 µg/m3 |
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The following table shows 6 counties that were monitored in 2001 but did not have enough historical data to calculate a valid 3-year average of the annual mean PM2.5 that could be compared to the established standard.
| County |
Average value |
| Edgecombe | N/A µg/m3 |
| Jackson | N/A µg/m3 |
| Montgomery | N/A µg/m3 |
| Pasquotank | N/A µg/m3 |
| Robeson | N/A µg/m3 |
| Watauga | N/A µg/m3 |
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