PM2.5 Design Values for 2006-2008 in NC Counties

There are no counties with a 3-year average of the annual mean PM2.5 for each year above the annual standard and no counties with a 3-year average of the 98th percentile above the daily standard.

A map of North Carolina PM2.5 Design Values from 2006 to 2008.

Figure 1 Annual Design Values (Mean) (click for larger image)

A map of North Carolina PM2.5 "Daily Standard" Design Values from 2006 to 2008.

Figure 2 Daily Design Values (98th %) (click for larger image)

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 annual standard and a 3-year average for the 98th percentile of PM2.5 concentrations below the established daily standard. The first column lists the county; the second lists the average value for that county (rounded to the specifications of the annual standard); the third lists the average value for that county (rounded to the specifications of the daily standard). In Counties with more than one PM2.5 monitoring site, the value reported is the highest 3-year average among the inclusive sites.

CountyAverage valueAverage 98th Percentile
Alamance12.9 µg/m328 µg/m3
Buncombe11.2 µg/m327 µg/m3
Caswell12.4 µg/m327 µg/m3
Catawba14.2 µg/m330 µg/m3
Chatham11.6 µg/m326 µg/m3
Cumberland13.0 µg/m328 µg/m3
Davidson14.5 µg/m329 µg/m3
Duplin10.5 µg/m324 µg/m3
Durham11.6 µg/m327 µg/m3
Edgecombe11.8 µg/m325 µg/m3
Forsyth13.3 µg/m329 µg/m3
Gaston13.4 µg/m327 µg/m3
Guilford12.8 µg/m329 µg/m3
Haywood12.4 µg/m327 µg/m3
Jackson11.3 µg/m326 µg/m3
Lenoir10.4 µg/m323 µg/m3
Martin10.4 µg/m323 µg/m3
McDowell13.0 µg/m329 µg/m3
Mecklenburg13.7 µg/m329 µg/m3
Mitchell11.6 µg/m327 µg/m3
Montgomery11.7 µg/m326 µg/m3
Pitt11.4 µg/m324 µg/m3
Robeson12.2 µg/m327 µg/m3
Rowan13.6 µg/m328 µg/m3
Swain11.9 µg/m327 µg/m3
Wake12.5 µg/m327 µg/m3
Watauga10.7 µg/m325 µg/m3
Wayne12.2 µg/m329 µg/m3