Monitoring Data >> Data Archives & Statistical Summaries >> Ozone Data Analysis
Detailed Raw Ozone Data

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.

View the 8-hour averages as

View the 1-hour averages as


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