Denver’s air quality today, September 27, 2025, is rated as good with an Air Quality Index of 36, meaning the air is healthy for all residents. Fine particulate matter known as PM2.5 is measured at 2 micrograms per cubic meter, and larger particulate matter, PM10, is at 26 micrograms per cubic meter, both well below levels associated with health concerns. Ozone levels are low at 12 parts per billion, with other pollutants like nitrogen dioxide and carbon monoxide also reported at minimal concentrations.
Over the past 24 hours, the air quality index in Denver fluctuated but consistently remained in the good range, with values peaking at 40 and dipping to as low as 18. The highest readings tended to occur midday, but at no point did air quality reach a level likely to pose health risks for sensitive groups or the general population.
Denver’s air quality performance this year remains strong, with over 90 percent of days in 2025 so far falling under the World Health Organization’s safe limits. Denverites can be confident heading outdoors today—conditions are clear from significant pollution, thanks in part to dry weather, modest wind speeds around 4 kilometers per hour, and low humidity. No special precautions are recommended, and everyone can safely enjoy outdoor activities without restriction.
Looking at historical data, Denver’s air quality on this date has consistently been classified as good in recent years, making today consistent with usual trends for early autumn. This overall clean air situation also suggests little lingering smoke or pollution from regional wildfires or industrial sources, both of which sometimes impact Colorado at this time of year.
In summary, Denver is experiencing healthy air quality conditions today, with very low pollution levels, posing little or no risk even to sensitive populations. Residents and visitors alike can enjoy fall weather and outdoor pursuits without concern for air pollution impacts on health.
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https://amzn.to/4nidg0PThis content was created in partnership and with the help of Artificial Intelligence AI
