The Colorado Department of Public Health and Environment and the Regional Air Quality Council issued an Ozone Action Day Alert at 4 p.m. Sunday for the Front Range Urban Corridor, warning that ozone concentrations in the Unhealthy for Sensitive Groups category were possible Sunday and Monday, mainly in and near the Denver metro area.
The alert covers the corridor from Douglas County north to Larimer and Weld counties, including the Denver-Boulder area, Fort Collins and Greeley. Affected counties are Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer and Weld. It remains in effect until at least 4 p.m. Monday.
