Worst air pollution Ōsaka, today and tomorrow
Today (10 August): Air quality in Ōsaka is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 37.5/100).
Tomorrow (11 August 2026): Air quality in Ōsaka is fair. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 34.4/100). 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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Osaka's air quality reflects the Osaka Bay coastal plain's partial topographic enclosure between the Ikoma Range and the Rokko Mountains, with vehicle traffic on the Hanshin Expressway and the surrounding manufacturing, port, and petrochemical corridor generating elevated industrial and vehicle emissions. Consistent Pacific sea breezes from Osaka Bay provide maritime ventilation, while the surrounding highland enclosure creates concentration under winter inversions and summer photochemical ozone from the vast Keihanshin metropolitan corridor is the primary warm-season concern.
Today - 10 August | Pollution peaks at 13:00
AQI:
Fair
37.5/100
PM2.5 (fine particles):
Good
11.7/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
24.6/100
O3 (ozone):
Fair
37.5/100
SO2 (sulfur dioxide):
Good
19.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.8/100
PM1 (ultrafine particles):
Good
15.6/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 13:00
AQI:
Fair
34.4/100
PM2.5 (fine particles):
Good
7.5/100
PM10 (coarse particles):
Good
2.7/100
NO2 (nitrogen dioxide):
Good
19.7/100
O3 (ozone):
Fair
34.4/100
SO2 (sulfur dioxide):
Good
12.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.8/100
PM1 (ultrafine particles):
Good
9.4/100
Frequently Asked Questions
Is air quality bad in Ōsaka right now?
On 10 August 2026, overall air quality in Ōsaka is fair. AQI is the main air quality indicator at 37.5/100. Pollution peaks around 1:00 PM (O3: 37.5/100).
Will air quality be worse tomorrow in Ōsaka?
On 11 August 2026, air quality conditions in Ōsaka will be similar to today, with AQI forecast at fair at 34.4/100. Pollution peaks around 1:00 PM (O3: 34.4/100).
When is air pollution at its worst in Ōsaka?
Pollution in Ōsaka typically rises when traffic on the surrounding roads, heavy industrial and chemical processing, together with textile and manufacturing operations combine, especially once dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. Strong sunlight reacting with local emissions drives up ground-level ozone.
Are air quality levels in Ōsaka 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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