PM2.5 Design Values for 2004-2006 in NC Counties

There are two counties with a 3-year average of the annual mean PM_2.5 above the annual standard, but no counties with a 3-year average of the 98^thpercentile 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 28 counties with a 3-year average of the annual mean PM_2.5 for each year below the established annual standard and 30 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. Averages for the counties marked with an asterisk are "unofficial estimates", because a sample size requirement ("data completeness") was not satisfied.

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