Worst air pollution Iruma, today and tomorrow
Today (16 July): Air quality in Iruma is poor. AQI and O3 are poor; PM2.5, NO2, SO2, and PM1 are fair; PM10, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 77.7/100).
Tomorrow (17 July 2026): Air quality in Iruma is fair. AQI improves to medium; O3 decreases to medium; HCHO increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 50.3/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Iruma's air quality reflects the flat Saitama Iruma River plain position adjacent to Iruma Air Base, with the Japan Air Self-Defense Force aviation operations and vehicle traffic on surrounding roads generating elevated NOₓ alongside the surrounding manufacturing and residential character. The flat Kanto Plain allows reasonable dispersal, while the aviation operations represent the most distinctive local emission source and summer photochemical ozone is the primary warm-season concern throughout the year.
Today - 16 July | Pollution peaks at 15:00
AQI:
Poor
77.7/100
PM2.5 (fine particles):
Fair
32.6/100
PM10 (coarse particles):
Good
9.7/100
NO2 (nitrogen dioxide):
Fair
33.2/100
O3 (ozone):
Poor
77.7/100
SO2 (sulfur dioxide):
Fair
27.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.9/100
PM1 (ultrafine particles):
Fair
36.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Medium
50.3/100
PM2.5 (fine particles):
Fair
22.1/100
PM10 (coarse particles):
Good
6.0/100
NO2 (nitrogen dioxide):
Fair
37.1/100
O3 (ozone):
Medium
50.3/100
SO2 (sulfur dioxide):
Fair
23.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.5/100
PM1 (ultrafine particles):
Fair
28.0/100
Frequently Asked Questions
Is air quality bad in Iruma right now?
On 16 July 2026, overall air quality in Iruma is poor. AQI is the main air quality indicator at 77.7/100. Pollution peaks around 3:00 PM (O3: 77.7/100).
Will air quality be worse tomorrow in Iruma?
On 17 July 2026, air quality conditions in Iruma will be better than today, with NO2 forecast at fair at 37.1/100. Pollution peaks around 1:00 PM (O3: 50.3/100).
When is air pollution at its worst in Iruma?
Air quality in Iruma tends to be worse when road traffic, airport and aviation operations, and petrochemical and refining operations build up and warm, sunny weather takes hold. Strong sunlight reacting with local emissions drives up ground-level ozone. Readings are generally lower during the cooler, cloudier months.
Are air quality levels in Iruma 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.
Check air quality in other popular cities:
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