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Denver Metro
No Advisories in Effect
No Indoor Burning Restrictions

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This is the Denver Metro Air Pollution Forecast effective 4PM on Friday, February 21, 2025:

No Advisories are in effect for the seven-county Denver-Boulder metropolitan area until at least 4 PM Saturday, February 22, 2025. Good or moderate air quality conditions are expected.

Adequate atmospheric mixing and ventilation is expected to result in Good visibility, and Good to Moderate air quality through Saturday afternoon.

For statewide conditions, forecasts and advisories, visit:
https://www.colorado.gov/airquality/colorado_summary.aspx

A poorly maintained vehicle pollutes more than a well maintained one. If you must drive, properly maintain your vehicle. We'll all breathe easier!

At 2PM (MST), Saturday, 2/22/2025 the highest AQI value was 64 for Ozone which indicates Moderate air quality. Unusually sensitive individuals may experience respiratory symptoms. Unusually sensitive people should consider reducing prolonged or heavy outdoor exertion.


Front Range Air Quality Forecast
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FRONT RANGE AIR QUALITY FORECAST:
Saturday, February 22, 2025, 1:50 PM MST

Ozone concentrations are expected to be in the Good to Moderate range on Saturday, and in the Good category on Sunday. Moderate concentrations of ozone are possible in lower foothill areas, to the west of the Denver Metro area. For health recommendations, see Fine Particulate Matter below.

Fine Particulate Matter concentrations are expected to be in the Good to Moderate range on Saturday, and in the Good category on Sunday. Moderate concentrations of fine particulates are most likely in northern portions of the Denver Metro area, and northward along the Platte River into southern and central Weld County including Platteville and Greeley. Unusually sensitive people should consider reducing prolonged or heavy exertion on Saturday.

Carbon Monoxide concentrations are expected to be in the Good category on Saturday and Sunday.

Nitrogen Dioxide concentrations are expected to be in the Good category on Saturday and Sunday.

Visibility on Sunday is expected to be Good.


Winter High Pollution Advisory Program
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The Winter High Pollution Advisory Program is coordinated by the Air Pollution Control Division of the Colorado Department of Public Health and Environment.

Winter season air pollution forecasts are issued daily from October 31 through March 31 at 4 p.m. When conditions warrant, forecasts will include information about Action Days and subsequent indoor burning restrictions.

An Action Day for fine particulates, carbon monoxide or ozone indicates that either current air quality is unhealthy or conditions are expected to worsen later in the day or on the next day. Action Days for air pollutants generally indicate that air quality will be in either the Unhealthy or Unhealthy-for-Sensitive-Groups categories according to the Air Quality Index. Action Days trigger mandatory restrictions that limit indoor burning to approved devices only, voluntary driving reductions, and public health recommendations.

An Action Day for Visibility alone indicates that the Visibility Standard Index for visual air quality is expected to be poor on the current or following day. An Action Day for Visibility will trigger mandatory restrictions on indoor burning and voluntary driving reductions for the seven-county Denver-Boulder metropolitan area only.

When no advisories are issued, air quality is good or moderate and is expected to remain so during the effective period of the forecast. No restrictions are in place.

Additional Information
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WHAT IS AN ACTION DAY?: An Action Day for fine particulate matter, carbon monoxide, ozone or other pollutants indicates that either current air quality is unhealthy or conditions are expected to worsen later in the day or on the next day. Action Days for air pollutants generally indicate that air quality will be in either the Unhealthy or Unhealthy-for-Sensitive-Groups categories according to the Air Quality Index. Action Days always convey overarching public health recommendations, and, according to season, trigger a variety of mandatory and voluntary pollution prevention measures. For example, during the summer open burning is prohibited when an Action Day for ozone and/or fine particulates is in effect. During the winter, residential burning restrictions are in effect when an Action Day for Visibility is in effect.

For a detailed description of both the AIR QUALITY INDEX and the VISIBILITY STANDARD INDEX please visit https://www.colorado.gov/airquality/brochure.aspx

COLORADO OPEN BURN FORECAST:
For those with permits for open burning, that is the burning of waste materials or vegetation outside, check the following webpage to find out if open burning is allowed today. Keep in mind that open burning is prohibited when an Action Day is in effect:
https://www.colorado.gov/airquality/burn_forecast.aspx

FOR CURRENT FRONT RANGE ACTION DAYS/ADVISORIES:
https://www.colorado.gov/airquality/advisory.aspx

FOR CURRENT AIR QUALITY CONDITIONS STATEWIDE:
https://www.colorado.gov/airquality/air_quality.aspx

SOCIAL MEDIA:
https://www.facebook.com/cdphe.apcd
https://twitter.com/cdpheapcd


AIR QUALITY NOTIFICATIONS:
https://www.colorado.gov/airquality/request_alerts.aspx(CDPHE automated e-mail alerts)
http://www.enviroflash.info/signup.cfm(CDPHE forecasts via automated e-mails from the EPA)