Worst air pollution City Park - Denver, today and tomorrow
Today (20 September): Air quality in City Park is fair. AQI, PM2.5, NO2, and O3 are fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 29.6/100).
Tomorrow (21 September 2026): Air quality in City Park is fair. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 37.3/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Denver's City Park air quality benefits from the 330-acre Front Range greenspace, with the park's extensive woodland and open meadow providing natural filtration against the surrounding Denver metro pollution. Vehicle traffic on 17th Avenue and the surrounding residential and museum corridor contribute local sources, while the Rocky Mountain westerly airflows on most days provide clean background ventilation and the park generally maintains better conditions than the enclosed Denver downtown street canyons throughout most of the year.
Today - 20 September | Pollution peaks at 10:00
AQI:
Fair
29.6/100
PM2.5 (fine particles):
Fair
27.5/100
PM10 (coarse particles):
Good
16.7/100
NO2 (nitrogen dioxide):
Fair
27.3/100
O3 (ozone):
Fair
29.6/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
14.7/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 09:00
AQI:
Fair
37.3/100
PM2.5 (fine particles):
Fair
25.3/100
PM10 (coarse particles):
Good
16.3/100
NO2 (nitrogen dioxide):
Fair
34.2/100
O3 (ozone):
Fair
37.3/100
SO2 (sulfur dioxide):
Good
1.6/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.9/100
PM1 (ultrafine particles):
Good
10.1/100
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Frequently Asked Questions
Is air quality bad in City Park right now?
On 20 September 2026, overall air quality in City Park is fair. AQI is the main air quality indicator at 29.6/100. Pollution peaks around 10:00 AM (O3: 29.6/100).
Will air quality be worse tomorrow in City Park?
On 21 September 2026, air quality conditions in City Park will be similar to today, with AQI forecast at fair at 37.3/100. Pollution peaks around 9:00 AM (O3: 37.3/100).
When is air pollution at its worst in City Park?
This neighborhood in Denver sees air quality shift through the year: the shoulder seasons of spring and fall typically offer the most stable, cleanest conditions, but valley and basin locations can see pollution trapped under cold air for days during winter inversions. Higher-elevation, more exposed locations generally avoid the worst of the valley inversion episodes.
Are air quality levels in City Park based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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