Worst air pollution Changsha, today and tomorrow
Today (10 August): Air quality in Changsha is fair. PM2.5, NO2, and PM1 are fair; AQI and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 12:00 PM (O3: 59.2/100).
Tomorrow (11 August 2026): Air quality in Changsha is poor. AQI worsens to poor; NO2 decreases to good; O3 increases to poor; HCHO increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 62.1/100). 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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Changsha in this context — noting this city has already been covered — reflects the Hunan Xiang River valley's flat basin position with manufacturing and vehicle density, generally maintaining moderate Hunan provincial capital readings throughout the year.
Today - 10 August | Pollution peaks at 12:00
AQI:
Medium
59.2/100
PM2.5 (fine particles):
Fair
25.3/100
PM10 (coarse particles):
Good
6.9/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Medium
59.2/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
20.0/100
PM1 (ultrafine particles):
Fair
32.5/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 16:00
AQI:
Poor
62.1/100
PM2.5 (fine particles):
Fair
25.6/100
PM10 (coarse particles):
Good
6.9/100
NO2 (nitrogen dioxide):
Good
18.2/100
O3 (ozone):
Poor
62.1/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.0/100
PM1 (ultrafine particles):
Fair
32.8/100
Frequently Asked Questions
Is air quality bad in Changsha right now?
On 10 August 2026, overall air quality in Changsha is fair. PM1 is the main pollutant at 32.5/100. Pollution peaks around 12:00 PM (O3: 59.2/100).
Will air quality be worse tomorrow in Changsha?
On 11 August 2026, air quality conditions in Changsha will be worse than today, with AQI forecast at poor at 62.1/100. Pollution peaks around 4:00 PM (O3: 62.1/100).
When is air pollution at its worst in Changsha?
Changsha usually sees its poorest air quality when traffic on the surrounding roads and manufacturing activity coincide with periods when weather conditions turn unfavourable. 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 Changsha 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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