DENVER (KDVR) — The seven-county Denver-Boulder metro area was placed under an Action Day for Visibility by the state health department due to low visibility Wednesday afternoon into Thursday.
According to the Colorado Department of Public Health and Environment, the metro region’s air quality was rated “moderate” and visibility on Thursday was projected to be “poor.” The Action Day was in effect from 4 p.m. on Wednesday through 4 p.m. on Thursday.
Denver weather: Mild, mostly dry metro with rounds of mountain snow
The seven-county region impacted includes Denver, Boulder, Broomfield, Douglas, Jefferson, and areas west of Kiowa Creek in Adams and Arapahoe counties.
Action days are called by the state health department when fine particulate matter, carbon monoxide, ozone or other air pollutants are creating unhealthy air quality conditions. The days typically indicate the air quality will be either “unhealthy” or “unhealthy for sensitive groups” categories under the Air Quality Index.