Worst air pollution Chech’ŏn, today and tomorrow
Today (10 August): Air quality in Chech’ŏn is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 32.8/100).
Tomorrow (11 August 2026): Air quality in Chech’ŏn is fair. All pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 38.9/100). 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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Chech'ŏn's air quality reflects the Chungcheongbuk-do Namhan River valley's partial enclosure between the Sobaek and Taebaek mountain ranges at 315 metres, with vehicle traffic on surrounding roads and the pharmaceutical manufacturing, cement, and tourism corridor contributing local sources. The mountain valley's topographic enclosure creates concentration under calm inversions, while seasonal Chinese dust transport elevates PM10 and Jecheon generally maintains moderate South Korean inland mountain valley provincial city readings throughout most of the year.
Today - 10 August | Pollution peaks at 14:00
AQI:
Fair
32.8/100
PM2.5 (fine particles):
Good
9.0/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
32.7/100
O3 (ozone):
Fair
32.8/100
SO2 (sulfur dioxide):
Good
11.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.1/100
PM1 (ultrafine particles):
Good
4.8/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 23:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
7.9/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Fair
38.9/100
O3 (ozone):
Fair
36.7/100
SO2 (sulfur dioxide):
Good
14.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.6/100
PM1 (ultrafine particles):
Good
4.8/100
Frequently Asked Questions
Is air quality bad in Chech’ŏn right now?
On 10 August 2026, overall air quality in Chech’ŏn is fair. AQI is the main air quality indicator at 32.8/100. Pollution peaks around 2:00 PM (O3: 32.8/100).
Will air quality be worse tomorrow in Chech’ŏn?
On 11 August 2026, air quality conditions in Chech’ŏn will be similar to today, with AQI forecast at fair at 38.9/100. Pollution peaks around 11:00 PM (NO2: 38.9/100).
When is air pollution at its worst in Chech’ŏn?
Air quality in Chech’ŏn tends to be worse when road traffic, steel, cement, and chemical production, and manufacturing activity build up and temperature inversions set in over the valley. 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 Chech’ŏn 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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