Archived Outdoors

Ozone season begins

Ozone season begins

The 2021 ozone season began March 1, signaling the resumption of daily air quality forecasts across North Carolina. 

Through Oct. 31, these county-based forecasts from the N.C. Division of Air Quality will include statewide ozone forecasts as well as year-round forecasts for fine particle pollution. Ozone forms in the air when nitrogen oxides react with hydrocarbons on warm, sunny days with little wind. 

Next-day and extended products are issued by 3 p.m. with a morning update by 10 a.m. Find it at

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