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Between June 1 and August 31, the Regional Air Quality Council (RAQC) will issue daily ozone advisories at 4:00 p.m. The RAQC issues the alerts to the media, individuals, local governments and businesses.
An Ozone Action Alert is issued on days when meteorologists from the Colorado Department of Public Health and Environment (CDPHE) expect weather conditions to lead to increased ground-level ozone concentrations in the metropolitan-Denver and Front Range region.
An alert indicates the potential for elevated 8-hour ozone levels. The alert will remain in effect for 24 hours.