Worst air pollution Yeosu, today and tomorrow
Today (10 August): Air quality in Yeosu is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (NO2: 33.7/100).
Tomorrow (11 August 2026): Air quality in Yeosu is medium. AQI improves to medium; NO2 decreases to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 54.3/100). 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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Yeosu's air quality faces significant industrial challenges from the South Korean southeastern South Sea coastal position, with the Yeosu National Industrial Complex's petrochemical and refinery operations — one of South Korea's largest industrial complexes — generating elevated industrial SO₂ and PM2.5 alongside vehicle traffic on surrounding roads. South Sea maritime breezes provide coastal ventilation, while the extraordinary industrial complex's scale makes Yeosu South Korea's most distinctively petrochemical-defined coastal urban air quality environment throughout the year.
Today - 10 August | Pollution peaks at 23:00
AQI:
Fair
33.7/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Fair
33.7/100
O3 (ozone):
Fair
25.9/100
SO2 (sulfur dioxide):
Good
15.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
5.3/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 15:00
AQI:
Medium
54.3/100
PM2.5 (fine particles):
Good
14.2/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Medium
41.3/100
O3 (ozone):
Medium
54.3/100
SO2 (sulfur dioxide):
Good
17.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.1/100
PM1 (ultrafine particles):
Good
9.1/100
Frequently Asked Questions
Is air quality bad in Yeosu right now?
On 10 August 2026, overall air quality in Yeosu is fair. AQI is the main air quality indicator at 33.7/100. Pollution peaks around 11:00 PM (NO2: 33.7/100).
Will air quality be worse tomorrow in Yeosu?
On 11 August 2026, air quality conditions in Yeosu will be better than today, with AQI forecast at medium at 54.3/100. Pollution peaks around 3:00 PM (O3: 54.3/100).
When is air pollution at its worst in Yeosu?
The biggest local contributors to pollution in Yeosu are vehicle traffic together with steel, cement, and chemical production, particularly once dry spells bring strong winds. These wind events can carry dust in from the surrounding arid landscape. Maritime airflow normally ventilates the area well, though calmer spells let levels rise.
Are air quality levels in Yeosu 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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