Worst air pollution Iwakuni, today and tomorrow
Today (16 July): Air quality in Iwakuni is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 71.0/100).
Tomorrow (17 July 2026): Air quality in Iwakuni is fair. AQI improves to medium; O3 decreases to medium; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 53.6/100). 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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Iwakuni's air quality reflects the Yamaguchi Prefecture Seto Inland Sea coastal position adjacent to Marine Corps Air Station Iwakuni, with vehicle traffic on surrounding roads and the US military aviation operations and the petrochemical and manufacturing corridor generating elevated NOₓ and industrial emissions. Consistent Seto Inland Sea maritime breezes provide coastal ventilation, while the military aviation operations represent the most distinctive local emission source and the industrial character maintains moderate Yamaguchi coastal corridor readings throughout most of the year.
Today - 16 July | Pollution peaks at 17:00
AQI:
Poor
71.0/100
PM2.5 (fine particles):
Good
13.5/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Good
14.6/100
O3 (ozone):
Poor
71.0/100
SO2 (sulfur dioxide):
Good
5.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.6/100
PM1 (ultrafine particles):
Good
17.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Medium
53.6/100
PM2.5 (fine particles):
Good
17.2/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Good
14.5/100
O3 (ozone):
Medium
53.6/100
SO2 (sulfur dioxide):
Good
6.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.1/100
PM1 (ultrafine particles):
Fair
20.5/100
Frequently Asked Questions
Is air quality bad in Iwakuni right now?
On 16 July 2026, overall air quality in Iwakuni is poor. AQI is the main air quality indicator at 71.0/100. Pollution peaks around 5:00 PM (O3: 71.0/100).
Will air quality be worse tomorrow in Iwakuni?
On 17 July 2026, air quality conditions in Iwakuni will be better than today, with PM1 forecast at fair at 20.5/100. Pollution peaks around 11:00 AM (O3: 53.6/100).
When is air pollution at its worst in Iwakuni?
In Iwakuni, traffic emissions, airport and aviation operations, along with petrochemical and refining operations are the main local sources, with conditions worsening when dry, windy weather picks up. These wind events can carry dust in from the surrounding arid landscape. Onshore breezes usually help clear the air, but pollution can build up when winds are light.
Are air quality levels in Iwakuni 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