SO2 Average Values for 2007-2009 in NC Counties

A map of North Carolina counties with sulfur dioxide ninety-ninth percentile averages from 2007 to 2009.


Table 1. The following table shows 3-year averages for the 99th percentile of daily maximum SO2concentrations. The first column lists the county, the second lists the average value for that county. One county in this list, New Hanover, exceeded the national ambient standard of 75 PPB by 43 percent. The other counties were below the standard.

County Average 99th Percentile
Beaufort 33.3 PPB
Forsyth 37.3 PPB
Mecklenburg 60.6 PPB
New Hanover 107.3 PPB
Wake 17.0 PPB