Worst air pollution Shiyan, today and tomorrow
Today (19 August): Air quality in Shiyan is poor. AQI and O3 are poor; PM2.5, NO2, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 65.0/100).
Tomorrow (20 August 2026): Air quality in Shiyan is fair. AQI improves to medium; O3 decreases to medium; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 59.9/100). Airmine updates local air quality forecasts four times daily.
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Shiyan's air quality reflects the Hubei northwestern Qinling-Daba Mountain Han River tributary valley at 289 metres, with vehicle traffic on surrounding expressways and the Dongfeng automobile manufacturing — Shiyan being China's automobile city — and military equipment corridor contributing elevated automotive industrial emissions. The surrounding mountain ranges create significant topographic enclosure, while winter inversions in the deeply enclosed mountain valley concentrate automotive manufacturing and heating emissions, making Shiyan China's most distinctively automobile manufacturing-defined mountain valley air quality environment.
Today - 19 August | Pollution peaks at 15:00
AQI:
Poor
65.0/100
PM2.5 (fine particles):
Fair
26.8/100
PM10 (coarse particles):
Good
8.0/100
NO2 (nitrogen dioxide):
Fair
37.5/100
O3 (ozone):
Poor
65.0/100
SO2 (sulfur dioxide):
Good
15.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.8/100
PM1 (ultrafine particles):
Fair
33.4/100
Levels show the poorest local air quality during the day
Tomorrow - 20 August | Pollution peaks at 11:00
AQI:
Medium
59.9/100
PM2.5 (fine particles):
Fair
33.4/100
PM10 (coarse particles):
Good
9.8/100
NO2 (nitrogen dioxide):
Fair
38.9/100
O3 (ozone):
Medium
59.9/100
SO2 (sulfur dioxide):
Good
13.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.3/100
PM1 (ultrafine particles):
Medium
40.2/100
Frequently Asked Questions
Is air quality bad in Shiyan right now?
On 19 August 2026, overall air quality in Shiyan is poor. AQI is the main air quality indicator at 65.0/100. Pollution peaks around 3:00 PM (O3: 65.0/100).
Will air quality be worse tomorrow in Shiyan?
On 20 August 2026, air quality conditions in Shiyan will be better than today, with NO2 forecast at fair at 38.9/100. Pollution peaks around 11:00 AM (O3: 59.9/100).
When is air pollution at its worst in Shiyan?
The biggest local contributors to pollution in Shiyan are traffic on the surrounding roads, aircraft operations at the local air base, along with manufacturing and food processing, particularly once temperature inversions set in over the valley. The surrounding valley terrain holds pollutants near the surface rather than letting them disperse. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher.
Are air quality levels in Shiyan 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: 18 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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