Front Range — Action Day for Multiple Pollutants
The Colorado Department of Public Health and Environment has issued an ACTION DAY ALERT at 4PM on Thursday, September 7, 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.
Local and regionally transported wildfire smoke combined with warm and stagnant winds will allow ozone and fine particulate concentrations to reach the Unhealthy for Sensitive Groups category on Thursday and Friday.
This Action Day Alert will remain in effect until at least 4 PM Friday, September 8, 2017.
For statewide conditions, forecasts and advisories, visit:
At 1PM (MST), Thursday, 9/7/2017 the highest AQI value was 82 for Particulate FRONT RANGE AIR QUALITY FORECAST:
Thursday, September 7, 2017, 2:30 PM MDT
Ozone concentrations are expected to be in the Moderate to Unhealthy for Sensitive Groups range on Thursday and Friday. Please refer to Fine Particulate Matter below for health recommendations on Thursday and Friday.
Fine Particulate Matter concentrations are expected to be in the Moderate to Unhealthy for Sensitive Groups range on Thursday and Friday. People with heart or lung disease, older adults, and children should avoid prolonged or heavy exertion on Thursday and Friday.
Carbon Monoxide concentrations are expected to be in the Good category on Thursday and Friday.
Nitrogen Dioxide concentrations are expected to be in the Good category on Thursday and Friday.
Visibility on Friday is expected to be Poor to Extremely Poor.
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