The Colorado Department of Public Health and Environment has issued an ACTION DAY ALERT at 4PM on Wednesday, September 6, 2017 for the Front Range Urban Corridor from El Paso County north to Larimer and Weld counties, including the Denver-Boulder area, Colorado Springs, Fort Collins and Greeley.
Wildfire smoke combined with hot, stagnant conditions will result in ozone and fine particulate concentrations occasionally reaching the Unhealthy for Sensitive Groups category on Wednesday and Thursday.
This Action Day Alert will remain in effect until at least 4 PM Thursday, September 7, 2017.
For statewide conditions, forecasts and advisories, visit:
http://www.colorado.gov/airquality/colorado_summary.aspx
At 1PM (MST), Wednesday, 9/6/2017 the highest AQI value was 76 for Particulate FRONT RANGE AIR QUALITY FORECAST:
Wednesday, September 6, 2017, 2:00 PM MDT
Ozone concentrations are expected to be in the Moderate to Unhealthy for Sensitive Groups range on Wednesday and Thursday. Please refer to Fine Particulate Matter below for health recommendations on Wednesday and Thursday.
Fine Particulate Matter concentrations are expected to be in the Moderate to Unhealthy for Sensitive Groups range on Wednesday and Thursday. People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion on Wednesday and Thursday.
Carbon Monoxide concentrations are expected to be in the Good category on Wednesday and Thursday.
Nitrogen Dioxide concentrations are expected to be in the Good category on Wednesday and Thursday.
Visibility on Thursday is expected to be Poor to Extremely Poor.