Worst air pollution Dayan, today and tomorrow
Today (10 August): Air quality in Dayan is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 35.7/100).
Tomorrow (11 August 2026): Air quality in Dayan is fair. All pollutants stay as today. Pollution peaks around 4:00 PM (O3: 39.7/100). 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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Dayan in Yunnan reflects the Lijiang Naxi Autonomous County's elevated plateau basin at 2,400 metres, with vehicle traffic on surrounding roads and the Lijiang Ancient Town's extraordinary UNESCO heritage tourism corridor contributing concentrated seasonal vehicle emissions. The elevated plateau position aids background dispersal, while the Yulong Snow Mountain backdrop creates dramatic topographic variation and Lijiang generally maintains good to moderate conditions given its extraordinary highland heritage setting throughout most of the year.
Today - 10 August | Pollution peaks at 14:00
AQI:
Fair
35.7/100
PM2.5 (fine particles):
Good
13.1/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
34.6/100
O3 (ozone):
Fair
35.7/100
SO2 (sulfur dioxide):
Good
4.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.3/100
PM1 (ultrafine particles):
Good
18.4/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 16:00
AQI:
Fair
39.7/100
PM2.5 (fine particles):
Good
6.7/100
PM10 (coarse particles):
Good
1.8/100
NO2 (nitrogen dioxide):
Fair
30.7/100
O3 (ozone):
Fair
39.7/100
SO2 (sulfur dioxide):
Good
7.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.8/100
PM1 (ultrafine particles):
Good
9.6/100
Frequently Asked Questions
Is air quality bad in Dayan right now?
On 10 August 2026, overall air quality in Dayan is fair. AQI is the main air quality indicator at 35.7/100. Pollution peaks around 2:00 PM (O3: 35.7/100).
Will air quality be worse tomorrow in Dayan?
On 11 August 2026, air quality conditions in Dayan will be similar to today, with AQI forecast at fair at 39.7/100. Pollution peaks around 4:00 PM (O3: 39.7/100).
When is air pollution at its worst in Dayan?
In Dayan, vehicle traffic and seasonal tourism traffic are the main local sources, with conditions worsening when winds are light and dispersion is poor. Background emissions and local weather both shape how conditions change from day to day. Conditions can otherwise vary considerably with the weather.
Are air quality levels in Dayan 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: 9 August 2026 at 20:27 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.
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