Worst air pollution Sŏngnam, today and tomorrow
Today (10 August): Air quality in Sŏngnam is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 58.3/100).
Tomorrow (11 August 2026): Air quality in Sŏngnam is poor. AQI worsens to poor; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 69.0/100). 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 - 10 August | Pollution peaks at 14:00
AQI:
Medium
58.3/100
PM2.5 (fine particles):
Good
6.9/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Good
2.2/100
O3 (ozone):
Medium
58.3/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
14.6/100
PM1 (ultrafine particles):
Good
5.6/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 16:00
AQI:
Poor
69.0/100
PM2.5 (fine particles):
Good
7.3/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
2.5/100
O3 (ozone):
Poor
69.0/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.2/100
PM1 (ultrafine particles):
Good
6.6/100
Frequently Asked Questions
Is air quality bad in Sŏngnam right now?
On 10 August 2026, overall air quality in Sŏngnam is medium. AQI is the main air quality indicator at 58.3/100. Pollution peaks around 2:00 PM (O3: 58.3/100).
Will air quality be worse tomorrow in Sŏngnam?
On 11 August 2026, air quality conditions in Sŏngnam will be worse than today, with AQI forecast at poor at 69.0/100. Pollution peaks around 4:00 PM (O3: 69.0/100).
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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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