Worst air pollution Daejeon, today and tomorrow
Today (16 July): Air quality in Daejeon 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: 64.2/100).
Tomorrow (17 July 2026): Air quality in Daejeon is poor. NO2 increases to poor; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 65.4/100). 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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Daejeon's air quality reflects the Geum River valley's partial enclosure in the central Korean Peninsula, with vehicle traffic on the Gyeongbu Expressway and the surrounding KAIST science campus, government, and manufacturing corridor contributing local sources. Seasonal Chinese dust transport elevates PM10 during spring yellow dust events, while the Korean government's clean energy transition and the science city character maintain Daejeon at moderate South Korean metropolitan readings throughout most of the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Poor
64.2/100
PM2.5 (fine particles):
Fair
24.1/100
PM10 (coarse particles):
Good
10.9/100
NO2 (nitrogen dioxide):
Medium
53.9/100
O3 (ozone):
Poor
64.2/100
SO2 (sulfur dioxide):
Good
13.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.7/100
PM1 (ultrafine particles):
Fair
28.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Poor
65.4/100
PM2.5 (fine particles):
Fair
23.6/100
PM10 (coarse particles):
Good
7.8/100
NO2 (nitrogen dioxide):
Poor
60.7/100
O3 (ozone):
Poor
65.4/100
SO2 (sulfur dioxide):
Good
12.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.3/100
PM1 (ultrafine particles):
Fair
28.3/100
Frequently Asked Questions
Is air quality bad in Daejeon right now?
On 16 July 2026, overall air quality in Daejeon is poor. AQI is the main air quality indicator at 64.2/100. Pollution peaks around 2:00 PM (O3: 64.2/100).
Will air quality be worse tomorrow in Daejeon?
On 17 July 2026, air quality conditions in Daejeon will be similar to today, with AQI forecast at poor at 65.4/100. Pollution peaks around 3:00 PM (O3: 65.4/100).
When is air pollution at its worst in Daejeon?
The biggest local contributors to pollution in Daejeon are traffic on the surrounding roads, manufacturing activity, and shipbuilding and port operations, particularly once dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. This is most noticeable during spring and autumn wind events.
Are air quality levels in Daejeon 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