Worst air pollution Okayama, today and tomorrow
Today (16 July): Air quality in Okayama is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 57.2/100).
Tomorrow (17 July 2026): Air quality in Okayama is very poor. AQI worsens to very poor; O3 increases to very poor; HCHO increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 91.3/100). 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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Okayama's air quality benefits from its exceptional Seto Inland Sea coastal position on Kojima Bay, with consistent Seto Inland Sea maritime breezes providing reliable ventilation. Vehicle traffic on surrounding expressways and the machinery, food processing, and peach farming corridor contribute local sources, while the outstanding Seto Inland Sea coastal exposure and the Chugoku Mountains rising inland create topographic variation and Okayama generally maintains good to moderate conditions for a major Japanese Seto Inland Sea coastal city.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
57.2/100
PM2.5 (fine particles):
Good
11.2/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Good
2.1/100
O3 (ozone):
Medium
57.2/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
20.0/100
PM1 (ultrafine particles):
Good
14.4/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Very poor
91.3/100
PM2.5 (fine particles):
Good
14.7/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
2.2/100
O3 (ozone):
Very poor
91.3/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
21.2/100
PM1 (ultrafine particles):
Good
19.9/100
Frequently Asked Questions
Is air quality bad in Okayama right now?
On 16 July 2026, overall air quality in Okayama is medium. AQI is the main air quality indicator at 57.2/100. Pollution peaks around 12:00 PM (O3: 57.2/100).
Will air quality be worse tomorrow in Okayama?
On 17 July 2026, air quality conditions in Okayama will be worse than today, with AQI forecast at very poor at 91.3/100. Pollution peaks around 3:00 PM (O3: 91.3/100).
When is air pollution at its worst in Okayama?
The biggest local contributors to pollution in Okayama are traffic emissions, textile and manufacturing operations, along with farming and agricultural processing, particularly once the sea breeze weakens. Maritime airflow normally ventilates the area well, though calmer spells let levels rise. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Okayama 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