Detailed Raw Ozone Data

To view either 1-hour or 8-hour ozone averages at every monitor on every day of that year... or

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...