North Carolina Counties with 8-Hour Ozone Violations 2011-2013

Table 1. One county, Mecklenburg, had a 3-year average of the annual 4th high value for each year equaling 0.076 ppm level or higher (violation of the 8-hour standard established in 2008). The first column lists the county; the second lists the average value for that county. On the 2011-2013 Design Value Map, Mecklenburg County is colored orange. Note: Violations occur when the annual 4th highest value averaged over a three year period equals 0.076 ppm or higher. Violating counties are colored orange in the map.

Table 2. Thirty-two monitored counties are attaining the 0.076 ppm standard that was established in 2008. The first column lists the county; the second lists the average value for that county. On the 2011-2013 Design Value Map, these counties are colored green.

Note:

1. 2008 Ozone Standard = 0.075 parts per milion (ppm).
2. Not all counties are required to monitor.
3. Additional counties may be involved in emission reduction strategies.
4. Nonattainment designation may differ from county boundaries.
5. Attaining counties are colored green in the map.
6. Final data validation is not yet complete.