Worst air pollution Sanmenxia, today and tomorrow
Today (10 August): Air quality in Sanmenxia is poor. AQI, NO2, and O3 are poor; PM2.5 and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 12:00 PM (O3: 69.6/100).
Tomorrow (11 August 2026): Air quality in Sanmenxia is poor. SO2 increases to fair; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 6:00 AM (NO2: 74.3/100). 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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Sanmenxia's air quality reflects the Henan Wei River and Yellow River confluence's partial topographic enclosure between the Xiaoqin and Funiu mountains at 410 metres, with vehicle traffic on surrounding expressways and the aluminium smelting, coal power, and agricultural corridor generating elevated industrial PM2.5. The valley's topographic enclosure concentrates emissions under winter inversions, while the aluminium smelting operations represent Sanmenxia's most distinctive industrial air quality contribution throughout most of the year.
Today - 10 August | Pollution peaks at 12:00
AQI:
Poor
69.6/100
PM2.5 (fine particles):
Fair
27.6/100
PM10 (coarse particles):
Good
12.9/100
NO2 (nitrogen dioxide):
Poor
64.3/100
O3 (ozone):
Poor
69.6/100
SO2 (sulfur dioxide):
Good
14.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.3/100
PM1 (ultrafine particles):
Fair
34.0/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 06:00
AQI:
Poor
74.3/100
PM2.5 (fine particles):
Fair
34.5/100
PM10 (coarse particles):
Good
10.0/100
NO2 (nitrogen dioxide):
Poor
74.3/100
O3 (ozone):
Poor
66.1/100
SO2 (sulfur dioxide):
Fair
22.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.4/100
PM1 (ultrafine particles):
Medium
40.7/100
Frequently Asked Questions
Is air quality bad in Sanmenxia right now?
On 10 August 2026, overall air quality in Sanmenxia is poor. AQI is the main air quality indicator at 69.6/100. Pollution peaks around 12:00 PM (O3: 69.6/100).
Will air quality be worse tomorrow in Sanmenxia?
On 11 August 2026, air quality conditions in Sanmenxia will be similar to today, with AQI forecast at poor at 74.3/100. Pollution peaks around 6:00 AM (NO2: 74.3/100).
When is air pollution at its worst in Sanmenxia?
The biggest local contributors to pollution in Sanmenxia are traffic on the surrounding roads together with agricultural burning, 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. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher.
Are air quality levels in Sanmenxia 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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