Worst air pollution Wŏnju, today and tomorrow
Today (10 August): Air quality in Wŏnju is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 37.8/100).
Tomorrow (11 August 2026): Air quality in Wŏnju is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 49.8/100). 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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Wŏnju's air quality reflects the Gangwon-do Wonju River valley's partial enclosure between the Taebaek and Sobaek mountain ranges, with vehicle traffic on surrounding roads and the medical device manufacturing, government, and cultural heritage corridor contributing local sources. The mountain valley's topographic enclosure creates concentration under calm inversions, while seasonal Chinese dust transport elevates PM10 and the regional Gangwon industrial background maintains moderate to elevated South Korean mountain valley provincial city readings throughout the year.
Today - 10 August | Pollution peaks at 14:00
AQI:
Fair
37.8/100
PM2.5 (fine particles):
Good
6.1/100
PM10 (coarse particles):
Good
2.3/100
NO2 (nitrogen dioxide):
Good
8.1/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.0/100
PM1 (ultrafine particles):
Good
3.7/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 15:00
AQI:
Medium
49.8/100
PM2.5 (fine particles):
Good
6.0/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Good
9.8/100
O3 (ozone):
Medium
49.8/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.1/100
PM1 (ultrafine particles):
Good
4.3/100
Frequently Asked Questions
Is air quality bad in Wŏnju right now?
On 10 August 2026, overall air quality in Wŏnju is fair. AQI is the main air quality indicator at 37.8/100. Pollution peaks around 2:00 PM (O3: 37.8/100).
Will air quality be worse tomorrow in Wŏnju?
On 11 August 2026, air quality conditions in Wŏnju will be better than today, with AQI forecast at medium at 49.8/100. Pollution peaks around 3:00 PM (O3: 49.8/100).
When is air pollution at its worst in Wŏnju?
In Wŏnju, road traffic, manufacturing activity, as well as harbour and shipping traffic are the main local sources, with conditions worsening when the surrounding valley traps air close to the ground. Topographic enclosure in the valley lets pollution accumulate rather than clear out. These wind events can carry dust in from the surrounding arid landscape.
Are air quality levels in Wŏnju 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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