SO2 Average Values for 2009-2011 in NC Counties

A map of North Carolina counties with sulfur dioxide ninety-ninth percentile averages from 2009 to 2011


Table 1. The following table shows 3-year averages for the 99th percentile of daily maximum SO2 concentrations. 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 19 percent. The other counties were below the standard.

County Average 99th Percentile
Beaufort 27.0 PPB
Forsyth 14.0 PPB
Mecklenburg 20.1 PPB
New Hanover 89.0 PPB
Wake 14.4 PPB