Worst air pollution Hengyang, today and tomorrow
Today (10 August): Air quality in Hengyang is fair. SO2 and PM1 are fair; AQI, NO2, and O3 are medium; PM2.5, PM10, CO, and HCHO are good. Pollution peaks around 11:00 AM (O3: 46.1/100).
Tomorrow (11 August 2026): Air quality in Hengyang is very poor. AQI worsens to very poor; PM2.5 increases to fair; NO2 increases to very poor; SO2 decreases to medium; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 91.7/100). 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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Hengyang's air quality reflects the Xiang River valley's partial enclosure in the central Hunan basin, with vehicle traffic on surrounding expressways and the cement, vanadium-titanium mining, and manufacturing corridor contributing local sources. The surrounding Nanling foothills create topographic variation, while winter coal heating under valley inversions and the regional South China industrial background maintain moderate to elevated central Hunan provincial readings throughout the year.
Today - 10 August | Pollution peaks at 11:00
AQI:
Medium
46.1/100
PM2.5 (fine particles):
Good
19.0/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Medium
45.5/100
O3 (ozone):
Medium
46.1/100
SO2 (sulfur dioxide):
Fair
37.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.5/100
PM1 (ultrafine particles):
Fair
24.0/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 23:00
AQI:
Very poor
91.7/100
PM2.5 (fine particles):
Fair
35.8/100
PM10 (coarse particles):
Good
10.2/100
NO2 (nitrogen dioxide):
Very poor
91.7/100
O3 (ozone):
Medium
50.8/100
SO2 (sulfur dioxide):
Medium
55.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
18.0/100
PM1 (ultrafine particles):
Medium
41.2/100
Frequently Asked Questions
Is air quality bad in Hengyang right now?
On 10 August 2026, overall air quality in Hengyang is fair. SO2 is the main pollutant at 37.0/100. Pollution peaks around 11:00 AM (O3: 46.1/100).
Will air quality be worse tomorrow in Hengyang?
On 11 August 2026, air quality conditions in Hengyang will be worse than today, with AQI forecast at very poor at 91.7/100. Pollution peaks around 11:00 PM (NO2: 91.7/100).
When is air pollution at its worst in Hengyang?
The biggest local contributors to pollution in Hengyang are road traffic, petrochemical and refining operations, as well as mining operations, particularly once temperature inversions set in over the valley. The bowl-like terrain here limits how quickly pollutants can escape. Dust carried on these winds adds substantially to particulate levels.
Are air quality levels in Hengyang 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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