Worst air pollution Ch’ŏnan, today and tomorrow
Today (16 July): Air quality in Ch’ŏnan is poor. AQI, NO2, and O3 are poor; PM2.5, SO2, and PM1 are fair; PM10, CO, and HCHO are good. Pollution peaks around 9:00 PM (NO2: 64.9/100).
Tomorrow (17 July 2026): Air quality in Ch’ŏnan is poor. PM2.5 decreases to medium; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 5:00 PM (O3: 79.1/100). 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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Ch'ŏnan's air quality reflects the flat Chungcheongnam-do Geumgang River plain at 23 metres, with vehicle traffic on surrounding expressways and the Samsung Display, automotive, and electronics manufacturing corridor contributing elevated industrial emissions. Seasonal Chinese dust transport elevates PM10 during spring yellow dust episodes, while the regional industrial background influences readings and Cheonan generally maintains moderate South Korean central corridor industrial city readings throughout the year.
Today - 16 July | Pollution peaks at 21:00
AQI:
Poor
64.9/100
PM2.5 (fine particles):
Fair
27.7/100
PM10 (coarse particles):
Good
12.4/100
NO2 (nitrogen dioxide):
Poor
64.9/100
O3 (ozone):
Poor
63.3/100
SO2 (sulfur dioxide):
Fair
24.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.2/100
PM1 (ultrafine particles):
Fair
32.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 17:00
AQI:
Poor
79.1/100
PM2.5 (fine particles):
Medium
41.3/100
PM10 (coarse particles):
Good
16.4/100
NO2 (nitrogen dioxide):
Poor
62.9/100
O3 (ozone):
Poor
79.1/100
SO2 (sulfur dioxide):
Fair
38.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.4/100
PM1 (ultrafine particles):
Medium
42.9/100
Frequently Asked Questions
Is air quality bad in Ch’ŏnan right now?
On 16 July 2026, overall air quality in Ch’ŏnan is poor. AQI is the main air quality indicator at 64.9/100. Pollution peaks around 9:00 PM (NO2: 64.9/100).
Will air quality be worse tomorrow in Ch’ŏnan?
On 17 July 2026, air quality conditions in Ch’ŏnan will be similar to today, with AQI forecast at poor at 79.1/100. Pollution peaks around 5:00 PM (O3: 79.1/100).
When is air pollution at its worst in Ch’ŏnan?
The biggest local contributors to pollution in Ch’ŏnan are traffic emissions, manufacturing activity, and port and shipping activity, particularly once dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. These episodes tend to cluster in spring and autumn.
Are air quality levels in Ch’ŏnan 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