Worst air pollution Chech’ŏn, today and tomorrow
Today (16 July): Air quality in Chech’ŏn is poor. AQI, NO2, and O3 are poor; SO2 is fair; PM2.5 and PM1 are medium; PM10, CO, and HCHO are good. Pollution peaks around 11:00 PM (NO2: 78.0/100).
Tomorrow (17 July 2026): Air quality in Chech’ŏn is very poor. AQI worsens to very poor; NO2 increases to very poor; O3 increases to very poor; SO2 decreases to medium; HCHO increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 87.1/100). 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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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 - 16 July | Pollution peaks at 23:00
AQI:
Poor
78.0/100
PM2.5 (fine particles):
Medium
41.1/100
PM10 (coarse particles):
Good
16.0/100
NO2 (nitrogen dioxide):
Poor
78.0/100
O3 (ozone):
Poor
74.7/100
SO2 (sulfur dioxide):
Fair
35.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.6/100
PM1 (ultrafine particles):
Medium
42.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Very poor
87.1/100
PM2.5 (fine particles):
Medium
43.7/100
PM10 (coarse particles):
Good
19.8/100
NO2 (nitrogen dioxide):
Very poor
80.3/100
O3 (ozone):
Very poor
87.1/100
SO2 (sulfur dioxide):
Medium
43.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.2/100
PM1 (ultrafine particles):
Medium
46.1/100
Frequently Asked Questions
Is air quality bad in Chech’ŏn right now?
On 16 July 2026, overall air quality in Chech’ŏn is poor. AQI is the main air quality indicator at 78.0/100. Pollution peaks around 11:00 PM (NO2: 78.0/100).
Will air quality be worse tomorrow in Chech’ŏn?
On 17 July 2026, air quality conditions in Chech’ŏn will be worse than today, with AQI forecast at very poor at 87.1/100. Pollution peaks around 1:00 PM (O3: 87.1/100).
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.
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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