NO2 Average Values for 2011-2013 in NC Counties

For many years there have been only two NO2 monitors in NC using a "federal reference method."

Table 1. The following table shows 3-year averages for the 98th percentile of daily maximum NO2 concentrations. The first column lists the county, the second lists the average value for that county.

County Average 98th Percentile
Forsyth 41 ppb
Mecklenburg 41 ppb