PM2.5 Design Values for 2000-2002 in NC Counties

A map of estimated annual mean PM2.5 for 24 hour concentrations for January 2000 through December 2002.

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

Table 1. The following table shows 24 counties with a 3-year average of the annual mean PM_2.5 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	14.5 µg/m3	at least one calendar quarter was not valid
Buncombe	14.6 µg/m3
Caswell	14.0 µg/m3
Chatham	12.8 µg/m3
Cumberland	14.7 µg/m3
Duplin	12.6 µg/m3
Edgecombe	14.1 µg/m3	at least one calendar quarter was not valid
Gaston	14.7 µg/m3
Haywood	14.6 µg/m3
Jackson	13.3 µg/m3	at least one calendar quarter was not valid
Lenoir	12.1 µg/m3
Mitchell	14.0 µg/m3
Montgomery	13.0 µg/m3
New Hanover	11.5 µg/m3
Onslow	11.6 µg/m3
Orange	13.6 µg/m3
Pasquotank	12.0 µg/m3
Pitt	13.0 µg/m3
Robeson	12.8 µg/m3	at least one calendar quarter was not valid
Swain	13.4 µg/m3
Wake	14.6 µg/m3
Watauga	11.7 µg/m3	at least one calendar quarter was not valid
Wayne	14.6 µg/m3

Table 2. The following table shows 7 counties with a 3-year average of the annual mean PM_2.5 for each year above the established standard. The first column lists the county; the second lists the average value for that county.

Note: Nonattainment designations may not follow county boundaries and will be based on later data than are shown in this table.

County	Average value
Cabarrus	15.1 µg/m3
Catawba	16.4 µg/m3
Davidson	16.8 µg/m3
Forsyth	15.6 µg/m3
Guilford	15.2 µg/m3
McDowell	15.6 µg/m3
Mecklenburg	15.8 µg/m3