Worst air pollution Crested Butte, today and tomorrow
Today (30 August): Air quality in Crested Butte is moderate. AQI and NO2 are moderate; O3 is fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (NO2: 43.4/100).
Tomorrow (31 August 2026): Air quality in Crested Butte is moderate. PM2.5 increases to fair; PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 41.3/100). Airmine updates local air quality forecasts four times daily.
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Crested Butte experiences air quality conditions shaped chiefly by high-altitude mountain air, and among the cleanest air in Colorado, aside from occasional wildfire smoke. Most days bring generally favorable conditions here, with occasional exceptions tied to shifting weather patterns. Checking current readings is still the best way to plan outdoor activity around Crested Butte.
Today - 30 August | Pollution peaks at 00:00
AQI:
Moderate
43.4/100
PM2.5 (fine particles):
Good
17.2/100
PM10 (coarse particles):
Good
18.7/100
NO2 (nitrogen dioxide):
Moderate
43.4/100
O3 (ozone):
Fair
39.5/100
SO2 (sulfur dioxide):
Good
10.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.1/100
PM1 (ultrafine particles):
Good
13.3/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 00:00
AQI:
Moderate
41.3/100
PM2.5 (fine particles):
Fair
24.3/100
PM10 (coarse particles):
Fair
25.2/100
NO2 (nitrogen dioxide):
Moderate
41.3/100
O3 (ozone):
Fair
31.4/100
SO2 (sulfur dioxide):
Good
9.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
10.7/100
Pollen forecast in Crested Butte
View pollen forecastFrequently Asked Questions
Is air quality bad in Crested Butte right now?
On 30 August 2026, overall air quality in Crested Butte is moderate. AQI is the main air quality indicator at 43.4/100. Pollution peaks around 12:00 AM (NO2: 43.4/100).
Will air quality be worse tomorrow in Crested Butte?
On 31 August 2026, air quality conditions in Crested Butte will be similar to today, with AQI forecast at moderate at 41.3/100. Pollution peaks around 12:00 AM (NO2: 41.3/100).
When is air pollution at its worst in Crested Butte?
Crested Butte's air quality follows a clear seasonal pattern: spring and autumn generally bring the cleanest, most stable air, but valley and basin locations can see pollution trapped under cold air for days during winter inversions. Valley and basin locations are especially prone to these winter inversion episodes compared to more exposed, higher terrain.
Are air quality levels in Crested Butte 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: 30 August 2026 at 14:32 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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