Worst air pollution Ouray, today and tomorrow
Today (16 July): Air quality in Ouray is fair. PM2.5 and PM1 are fair; AQI, NO2, and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (NO2: 46.4/100).
Tomorrow (17 July 2026): Air quality in Ouray is fair. O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 AM (NO2: 47.8/100). 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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Ouray experiences air quality conditions shaped chiefly by steep canyon topography, and the surrounding cliffs can briefly trap wood-smoke on calm winter nights. Day-to-day conditions in Ouray can still vary with local weather, wind direction, and time of year. Local topography and prevailing winds both play a role in how quickly conditions change.
Today - 16 July | Pollution peaks at 23:00
AQI:
Medium
46.4/100
PM2.5 (fine particles):
Fair
33.0/100
PM10 (coarse particles):
Good
16.7/100
NO2 (nitrogen dioxide):
Medium
46.4/100
O3 (ozone):
Medium
40.2/100
SO2 (sulfur dioxide):
Good
10.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Fair
22.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 00:00
AQI:
Medium
47.8/100
PM2.5 (fine particles):
Fair
30.7/100
PM10 (coarse particles):
Good
15.9/100
NO2 (nitrogen dioxide):
Medium
47.8/100
O3 (ozone):
Fair
38.6/100
SO2 (sulfur dioxide):
Good
12.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.1/100
PM1 (ultrafine particles):
Good
19.5/100
Pollen forecast in Ouray
View pollen forecastFrequently Asked Questions
Is air quality bad in Ouray right now?
On 16 July 2026, overall air quality in Ouray is fair. PM2.5 is the main pollutant at 33.0/100. Pollution peaks around 11:00 PM (NO2: 46.4/100).
Will air quality be worse tomorrow in Ouray?
On 17 July 2026, air quality conditions in Ouray will be similar to today, with O3 forecast at fair at 38.6/100. Pollution peaks around 12:00 AM (NO2: 47.8/100).
When is air pollution at its worst in Ouray?
Air quality in Ouray shifts across the year. Typically, autumn is often the cleanest stretch, between wildfire season and the onset of winter inversions, while winter temperature inversions can trap cold air and pollution in valleys and basins for days at a time. Valley and basin locations are especially prone to these winter inversion episodes compared to more exposed, higher terrain.
Are air quality levels in Ouray 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app