Denver’s air quality today is rated as Good, with the Air Quality Index in the low to mid 40s for ozone, and all primary pollutants—ozone, particulate matter, carbon monoxide, and nitrogen dioxide—remaining well below levels of health concern. There are no air quality advisories in effect for Denver or the broader Front Range region.
The most recent measurements report a highest AQI value of 46 for ozone and 44 around midday yesterday, both categorized as Good by the Environmental Protection Agency. Air quality forecasts expect continued Good air quality conditions through the weekend.
Throughout 2025, Denver’s air has remained largely within the World Health Organization’s safe limits, with over ninety percent of days rated as Good. The average AQI for the year has been 33, signifying consistently clean air. The highest AQI observed locally in the past two days reached 44 at 2 PM, while the lowest, a very clean 10, was recorded at 7 AM. These values reflect the typical daily pattern: slightly higher AQI numbers in the afternoon and lowest in the early morning hours, but always remaining within the Good category.
Ozone, which tends to rise on hot, sunny days, has been the primary air quality concern in recent years, but today levels are low. Monitoring data from the Colorado Department of Public Health and Environment and the Regional Air Quality Council confirm no Action Day alerts for ozone or particulates are necessary, and no restrictions, such as burning or driving advisories, are in effect.
For sensitive populations including young children, the elderly, and those with respiratory conditions, today’s air does not pose a measurable risk. Residents and visitors can safely engage in outdoor activities across Denver and surrounding counties. Visibility is forecasted to remain Good to Moderate, and the risk of acute or chronic health effects is considered very low given today’s pollution levels.
Denver continues to benefit from improved air quality and stable weather conditions, supporting healthy outdoor recreation this October day.
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