Air Quality Index in Denver, CO

Denver, CO

Denver, known as the "Mile High City" is celebrated for its stunning mountain views, outdoor recreation, and vibrant urban culture. However, its unique geography and growing urban population can contribute to fluctuating air quality. Factors such as vehicle emissions, industrial activity, and weather patterns, combined with Denver's location in a valley near the Rockies, often impact its air quality index.

Air Quality Index

February 5, 2025

Good

Air quality is ideal, with minimal or no risk to health.

NO₂

PM_2.5

M₁₀

O₃

Air Quality Index

February 6, 2025

Good

Air quality is ideal, with minimal or no risk to health.

NO₂

PM_2.5

M₁₀

O₃

Air Quality Index

February 7, 2025

Fair

Air quality is acceptable, but some individuals, particularly those unusually sensitive to air pollution, may experience minor health effects.

NO₂

PM_2.5

M₁₀

O₃

Air Quality Index

February 8, 2025

Fair

Air quality is acceptable, but some individuals, particularly those unusually sensitive to air pollution, may experience minor health effects.

NO₂

PM_2.5

M₁₀

O₃

Air Quality Index

February 9, 2025

Fair

Air quality is acceptable, but some individuals, particularly those unusually sensitive to air pollution, may experience minor health effects.

NO₂

PM_2.5

M₁₀

O₃

5-Day Air Quality Index Forecast in Denver, CO

Tips to Protect Yourself from Unhealthy Air Quality in Denver, CO

Limit outdoor activities when pollution levels are high, especially during midday and afternoon when ozone levels peak. Keep windows and doors closed, and use air purifiers to maintain clean indoor air.

Track Denver’s air quality index and plan activities accordingly, avoiding outdoor exercise or prolonged exposure on days with elevated pollution levels.

When going outdoors during high pollution, wear a high-quality mask, such as an N95 or KN95, to filter out fine particulate matter (PM2.5). Additionally, stay hydrated and consume antioxidant-rich foods to support your respiratory health.

FAQ

Frequently Asked Questions

When is AQI usually the worst in Denver?

The AQI in Denver is generally the worst during the summer months, particularly from May to August, due to high temperatures and intense sunlight that promote the formation of ground-level ozone. Air quality can also be poor during periods of stagnant weather, which can trap pollutants in the area, especially in the afternoons. Additionally, during winter months, high pressure systems can lead to inversions that trap pollution close to the ground, worsening the AQI.
What are common pollutants that impact AQI in Denver?

Common pollutants that affect Denver’s AQI include ground-level ozone (O₃), which is formed when vehicle emissions and industrial pollutants react with sunlight. Particulate matter (PM2.5 and PM10) from traffic, construction, and wildfires also significantly impact air quality, particularly in summer and fall. Nitrogen dioxide (NO₂) from vehicle exhaust and industrial emissions, along with carbon monoxide (CO) from combustion, further contribute to poor air quality, especially in urban areas.
Are there specific areas in Denver with better AQI?

Certain areas in Denver tend to have better air quality, especially those further away from major traffic corridors and industrial areas. Neighborhoods located in the foothills or with more green spaces, such as those near City Park or Washington Park, tend to have better air quality. Areas in central Denver and those near major highways or industrial zones often experience higher levels of pollution. Monitoring AQI by neighborhood can help identify cleaner areas during times of poor air quality.