× Air Quality Alert
Until 2025-01-04T16:00:00-07:00 • National Weather Service
The Colorado Department of Public Health and Environment has issued the following... WHAT...Action Day for Particulates. WHERE...Boulder, Broomfield, Adams, Denver, Jefferson, Arapahoe, and Douglas Counties WHEN...300 PM Friday January 03 to 400 PM Saturday January 04 IMPACTS...An Action Day for Particulates is now in effect for the seven-county Denver-Boulder metropolitan area. Request to limit driving gas and diesel-powered vehicles is now in effect until at least 4 PM Saturday, January 4, 2025. Stagnant weather conditions will result in fine particulate concentrations reaching the Unhealthy for Sensitive Groups category, particularly in and near the Denver metro area. Air quality should improve Saturday afternoon into Saturday evening.For areas included in this advisory that are not expected to exceed the Unhealthy for Sensitive Groups (USG) air quality designation, we request that activities, such as driving gas or diesel vehicles be reduced to lessen the impacts on neighboring air quality. Additional air pollution in this region may directly worsen air quality or contribute to precursors which may also adversely affect air quality. For Colorado air quality conditions, forecasts and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx HEALTH INFORMATION...Increasing likelihood of respiratory symptoms in sensitive individuals, aggravation of heart or lung disease and premature mortality in people with cardiopulmonary disease and older adults. People with heart or lung disease, older adults, and children should reduce prolonged or heavy exertion.