Worst air pollution Asan, today and tomorrow
Today (16 July): Air quality in Asan is poor. AQI and O3 are poor; PM2.5 and PM1 are fair; NO2 is medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 63.3/100).
Tomorrow (17 July 2026): Air quality in Asan is poor. PM2.5 decreases to medium; SO2 increases to fair; 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.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Asan's air quality reflects the flat Chungcheongnam-do Asan Bay coastal position, with vehicle traffic on surrounding expressways and the Samsung automotive manufacturing, chemical, and logistics corridor contributing elevated industrial emissions. Yellow Sea breezes provide coastal ventilation, while seasonal Chinese dust transport elevates PM10 and the Samsung automotive manufacturing represents the most distinctive local industrial emission source throughout the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Poor
63.3/100
PM2.5 (fine particles):
Fair
25.9/100
PM10 (coarse particles):
Good
11.5/100
NO2 (nitrogen dioxide):
Medium
54.2/100
O3 (ozone):
Poor
63.3/100
SO2 (sulfur dioxide):
Good
17.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.2/100
PM1 (ultrafine particles):
Fair
30.6/100
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
40.5/100
PM10 (coarse particles):
Good
15.2/100
NO2 (nitrogen dioxide):
Medium
52.5/100
O3 (ozone):
Poor
79.1/100
SO2 (sulfur dioxide):
Fair
27.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.4/100
PM1 (ultrafine particles):
Medium
41.9/100
Frequently Asked Questions
Is air quality bad in Asan right now?
On 16 July 2026, overall air quality in Asan is poor. AQI is the main air quality indicator at 63.3/100. Pollution peaks around 2:00 PM (O3: 63.3/100).
Will air quality be worse tomorrow in Asan?
On 17 July 2026, air quality conditions in Asan 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 Asan?
Asan usually sees its poorest air quality when vehicle traffic, heavy industrial and chemical processing, as well as textile and manufacturing operations coincide with periods when windblown dust events occur. Dust carried on these winds adds substantially to particulate levels. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Asan 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