Worst air pollution Hengyang, today and tomorrow
Today (16 July): Air quality in Hengyang is fair. O3 and SO2 are fair; AQI and NO2 are medium; PM2.5, PM10, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 45.9/100).
Tomorrow (17 July 2026): Air quality in Hengyang is fair. SO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 10:00 PM (NO2: 51.1/100). 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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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 - 16 July | Pollution peaks at 23:00
AQI:
Medium
45.9/100
PM2.5 (fine particles):
Good
12.1/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Medium
45.9/100
O3 (ozone):
Fair
36.1/100
SO2 (sulfur dioxide):
Fair
37.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.5/100
PM1 (ultrafine particles):
Good
17.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 22:00
AQI:
Medium
51.1/100
PM2.5 (fine particles):
Good
14.2/100
PM10 (coarse particles):
Good
4.0/100
NO2 (nitrogen dioxide):
Medium
51.1/100
O3 (ozone):
Fair
36.6/100
SO2 (sulfur dioxide):
Medium
41.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.4/100
PM1 (ultrafine particles):
Good
19.7/100
Frequently Asked Questions
Is air quality bad in Hengyang right now?
On 16 July 2026, overall air quality in Hengyang is fair. SO2 is the main pollutant at 37.3/100. Pollution peaks around 11:00 PM (NO2: 45.9/100).
Will air quality be worse tomorrow in Hengyang?
On 17 July 2026, air quality conditions in Hengyang will be similar to today, with O3 forecast at fair at 36.6/100. Pollution peaks around 10:00 PM (NO2: 51.1/100).
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.
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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