Worst air pollution Xi’an, today and tomorrow
Today (10 August): Air quality in Xi’an is very poor. AQI and O3 are very poor; PM2.5, NO2, and PM1 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 99.6/100).
Tomorrow (11 August 2026): Air quality in Xi’an is very poor. All pollutants stay as today. Pollution peaks around 4:00 PM (O3: 93.1/100). 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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Xi'an's air quality reflects the Guanzhong Basin's severe topographic enclosure between the Qinling and Loess Plateau ranges at 400 metres, with vehicle traffic on the Second Ring Road and surrounding manufacturing and residential heating generating elevated PM2.5 under persistent winter inversions. The basin's nearly complete mountain enclosure creates some of inland China's most severe winter pollution trapping, while summer air quality is considerably better with monsoon ventilation throughout the warmer months.
Today - 10 August | Pollution peaks at 15:00
AQI:
Very poor
99.6/100
PM2.5 (fine particles):
Medium
40.2/100
PM10 (coarse particles):
Good
16.1/100
NO2 (nitrogen dioxide):
Medium
49.7/100
O3 (ozone):
Very poor
99.6/100
SO2 (sulfur dioxide):
Good
14.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.7/100
PM1 (ultrafine particles):
Medium
43.0/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 16:00
AQI:
Very poor
93.1/100
PM2.5 (fine particles):
Medium
42.4/100
PM10 (coarse particles):
Good
14.8/100
NO2 (nitrogen dioxide):
Medium
48.4/100
O3 (ozone):
Very poor
93.1/100
SO2 (sulfur dioxide):
Good
15.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.3/100
PM1 (ultrafine particles):
Medium
46.2/100
Frequently Asked Questions
Is air quality bad in Xi’an right now?
On 10 August 2026, overall air quality in Xi’an is very poor. AQI is the main air quality indicator at 99.6/100. Pollution peaks around 3:00 PM (O3: 99.6/100).
Will air quality be worse tomorrow in Xi’an?
On 11 August 2026, air quality conditions in Xi’an will be similar to today, with AQI forecast at very poor at 93.1/100. Pollution peaks around 4:00 PM (O3: 93.1/100).
When is air pollution at its worst in Xi’an?
The biggest local contributors to pollution in Xi’an are traffic emissions and manufacturing and food processing, particularly once the surrounding valley traps air close to the ground. The surrounding valley terrain holds pollutants near the surface rather than letting them disperse. Rainfall through the monsoon usually keeps levels in check.
Are air quality levels in Xi’an 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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