North Carolina Counties with 8-Hour Ozone Violations 1996-1998

Table 1. The following table shows 18 counties and 31 of 42 sites with a 3-year average of the annual 4th high value for each year equaling 0.085 ppm level or higher (violation of the 8-hour standard). The first column lists the county; the second lists the average values for that county.

County Average value
Caswell .093 ppm
Chatham .087 ppm
Cumberland .088 ppm
Davie .093 ppm
Durham .086 ppm
Edgecombe .086 ppm
Forsyth .092 ppm
Franklin .093 ppm
Granville .097 ppm
Guilford .088 ppm
Haywood .091 ppm
Johnston .089 ppm
Lincoln .086 ppm
Mecklenburg .103 ppm
Pitt .091 ppm
Rockingham .089 ppm
Rowan .097 ppm
Wake .095 ppm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 2. The following table shows 4 counties with less than a 3 consecutive year average but with a 4th high .085 or higher. The first column lists the county; the second lists the average values for that county.

County Average Value
Caldwell .085 ppm *
Lenoir .092 ppm ***
Northampton .086 ppm *
Person .093 ppm ***

 

 

 

 

 

 

 

 

Table 3. The following table shows 9 monitoried counties which are attaining the .085 ppm standard. The first column lists the county; the second lists the average values for that county.

County Average Value
Alexander .084 ppm
Avery .082 ppm ***
Buncombe .080 ppm
Camden .082 ppm *
Duplin .080 ppm
Martin .080 ppm *
New Hanover .082 ppm
Swain .070 ppm
Yancey .081 ppm **

 

 

 

 

 

 

 

 

 

 

 

*  Based on Calendar years 1995, 1997, and 1998, which is not suitable for attainment determination (nonconsecutive years)
** Based on Calendar years 1995, 1996, and 1997
***Based on Calendar years 1998 alone, which is not sufficient for attainment determination

Note:

  • Designations will be based on 1997-1999 ozone seasons
  • Additional counties may be involved in emission reduction strategies
  • Nonattainment designations may not follow county boundaries