Select a year and a format to view either 1-hour or 8-hour ozone averages at every monitor on every day of that year.
Ozone 'Design Value' Maps
To aid in planning for attainment of the 8-hour ozone standard, the following North Carolina maps have been drawn showing the 3-year-average fourth-highest daily 8-hour concentrations in each county.
North Carolina Counties with 8-hour Ozone Violations
N.C. Division of Air Quality • Mailing Address: 1641 Mail Service Center, Raleigh, NC 27699-1641
Physical Address: 217 West Jones Street, Raleigh, NC 27603 • Phone: 919-707-8400 • Fax: 919-707-0718
Email us: DENR.DAQ@ncdenr.gov