Worst air pollution Ōita, today and tomorrow
Today (10 August): Air quality in Ōita 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: 35.2/100).
Tomorrow (11 August 2026): Air quality in Ōita is fair. AQI improves to medium; O3 decreases to medium; HCHO increases to fair; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 54.9/100). 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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Ōita's air quality reflects the northeastern Kyushu Ōita Bay coastal position, with consistent Pacific and Bungo Channel maritime breezes providing reliable ventilation. Vehicle traffic on surrounding roads and the Showa Denko and Nippon Steel petrochemical and steel corridor contribute local sources, while the outstanding coastal exposure and the Kunisaki Peninsula's highland backdrop create topographic variation and Oita generally maintains moderate to good conditions for a major Japanese Kyushu coastal industrial city throughout most of the year.
Today - 10 August | Pollution peaks at 23:00
AQI:
Fair
35.2/100
PM2.5 (fine particles):
Good
11.1/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Fair
35.2/100
O3 (ozone):
Fair
22.7/100
SO2 (sulfur dioxide):
Good
4.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
17.2/100
PM1 (ultrafine particles):
Good
13.5/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 14:00
AQI:
Medium
54.9/100
PM2.5 (fine particles):
Good
12.4/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Fair
37.7/100
O3 (ozone):
Medium
54.9/100
SO2 (sulfur dioxide):
Good
6.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.0/100
PM1 (ultrafine particles):
Good
15.7/100
Frequently Asked Questions
Is air quality bad in Ōita right now?
On 10 August 2026, overall air quality in Ōita is fair. AQI is the main air quality indicator at 35.2/100. Pollution peaks around 11:00 PM (NO2: 35.2/100).
Will air quality be worse tomorrow in Ōita?
On 11 August 2026, air quality conditions in Ōita will be similar to today, with NO2 forecast at fair at 37.7/100. Pollution peaks around 2:00 PM (O3: 54.9/100).
When is air pollution at its worst in Ōita?
In Ōita, road traffic and steel, cement, and chemical production are the main local sources, with conditions worsening when windblown dust events occur. These wind events can carry dust in from the surrounding arid landscape. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Ōita 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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