Worst air pollution Sŏngnam, today and tomorrow
Today (16 July): Air quality in Sŏngnam is poor. AQI and O3 are poor; PM2.5 and PM1 are fair; PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 61.2/100).
Tomorrow (17 July 2026): Air quality in Sŏngnam is very poor. AQI worsens to very poor; O3 increases to very poor; HCHO increases to fair; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 100/100). 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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Sŏngnam's air quality reflects the flat Gyeonggi-do southern Seoul metropolitan corridor position, with vehicle traffic on surrounding expressways and the Pangyo Technology Valley, residential, and commercial corridor contributing local sources. Seasonal Chinese dust transport elevates PM10 during spring yellow dust episodes, while the regional Northeast Asian industrial background elevates PM2.5 and Seongnam generally maintains moderate to elevated Seoul southern metropolitan suburban readings throughout the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Poor
61.2/100
PM2.5 (fine particles):
Fair
32.6/100
PM10 (coarse particles):
Good
12.4/100
NO2 (nitrogen dioxide):
Good
9.0/100
O3 (ozone):
Poor
61.2/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.8/100
PM1 (ultrafine particles):
Fair
33.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Fair
34.6/100
PM10 (coarse particles):
Good
10.7/100
NO2 (nitrogen dioxide):
Good
8.6/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.4/100
PM1 (ultrafine particles):
Medium
40.2/100
Frequently Asked Questions
Is air quality bad in Sŏngnam right now?
On 16 July 2026, overall air quality in Sŏngnam is poor. AQI is the main air quality indicator at 61.2/100. Pollution peaks around 2:00 PM (O3: 61.2/100).
Will air quality be worse tomorrow in Sŏngnam?
On 17 July 2026, air quality conditions in Sŏngnam will be worse than today, with AQI forecast at very poor at 100/100. Pollution peaks around 2:00 PM (O3: 100/100).
When is air pollution at its worst in Sŏngnam?
The biggest local contributors to pollution in Sŏngnam are traffic emissions along with port and shipping activity, particularly once dry spells bring strong winds. Dust carried on these winds adds substantially to particulate levels. Such events are most common in the drier shoulder seasons.
Are air quality levels in Sŏngnam 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