Worst air pollution Kumagaya, today and tomorrow
Today (16 July): Air quality in Kumagaya is poor. AQI and O3 are poor; PM2.5, NO2, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 77.7/100).
Tomorrow (17 July 2026): Air quality in Kumagaya is fair. AQI improves to medium; PM2.5 decreases to good; 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.
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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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Kumagaya's air quality reflects the flat Saitama Arakawa River plain position, with vehicle traffic on surrounding roads and the manufacturing, logistics, and residential corridor contributing local sources. The flat Kanto Plain allows reasonable dispersal, while the Foehn-like Oroshi winds and summer photochemical ozone from the Kanto corridor are the primary warm-season concerns — Kumagaya holding Japan's record high temperature — and the area generally maintains moderate to elevated Japanese Kanto plain inland readings throughout the summer months.
Today - 16 July | Pollution peaks at 15:00
AQI:
Poor
77.7/100
PM2.5 (fine particles):
Fair
29.3/100
PM10 (coarse particles):
Good
8.6/100
NO2 (nitrogen dioxide):
Fair
21.1/100
O3 (ozone):
Poor
77.7/100
SO2 (sulfur dioxide):
Good
15.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.9/100
PM1 (ultrafine particles):
Fair
33.5/100
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):
Good
20.0/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Fair
23.4/100
O3 (ozone):
Medium
50.3/100
SO2 (sulfur dioxide):
Good
13.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.5/100
PM1 (ultrafine particles):
Fair
25.6/100
Frequently Asked Questions
Is air quality bad in Kumagaya right now?
On 16 July 2026, overall air quality in Kumagaya 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 Kumagaya?
On 17 July 2026, air quality conditions in Kumagaya will be better than today, with PM1 forecast at fair at 25.6/100. Pollution peaks around 1:00 PM (O3: 50.3/100).
When is air pollution at its worst in Kumagaya?
In Kumagaya, traffic emissions, petrochemical and refining operations, and textile and manufacturing operations are the main local sources, with conditions worsening when warm, sunny weather takes hold. Photochemical reactions in the heat push ozone levels higher. Readings are generally lower during the cooler, cloudier months.
Are air quality levels in Kumagaya 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