PM2.5 Design Values for 2009-2011 in NC Counties

There are no counties with a 3-year average of the annual mean PM_2.5 for each year above the annual standard and no counties with a 3-year average of the 98^th percentile above the daily standard.

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

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

Table 1. The following table shows 30 counties with a 3-year average of the annual mean PM_2.5 for each year below the established annual standard and 29 counties with 3-year averages for the 98^th percentile of PM_2.5 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 PM_2.5 monitoring site, the value reported is the highest 3-year average among the inclusive sites.