Worst air pollution Ōta, today and tomorrow
Today (16 July): Air quality in Ōta is poor. AQI and O3 are poor; PM2.5 and PM1 are fair; PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 79.1/100).
Tomorrow (17 July 2026): Air quality in Ōta is medium. AQI improves to medium; PM2.5 decreases to good; O3 decreases to medium; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 58.4/100). 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
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Ōta in Gunma reflects the flat Gunma Prefecture Tone River plain at the Kantō Plain's northern edge, with vehicle traffic on surrounding roads and the Subaru automotive manufacturing — Ōta being Subaru's global headquarters — generating elevated automotive industrial and vehicle testing emissions. The flat Kanto Plain generally allows reasonable dispersal, while summer photochemical ozone from the Kanto corridor is the primary warm-season concern and Ota's automotive manufacturing character creates a distinctive local emission profile throughout the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Poor
79.1/100
PM2.5 (fine particles):
Fair
21.8/100
PM10 (coarse particles):
Good
6.0/100
NO2 (nitrogen dioxide):
Good
12.4/100
O3 (ozone):
Poor
79.1/100
SO2 (sulfur dioxide):
Good
8.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.3/100
PM1 (ultrafine particles):
Fair
26.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Medium
58.4/100
PM2.5 (fine particles):
Good
12.3/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Good
14.9/100
O3 (ozone):
Medium
58.4/100
SO2 (sulfur dioxide):
Good
7.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.8/100
PM1 (ultrafine particles):
Good
17.3/100
Frequently Asked Questions
Is air quality bad in Ōta right now?
On 16 July 2026, overall air quality in Ōta is poor. AQI is the main air quality indicator at 79.1/100. Pollution peaks around 1:00 PM (O3: 79.1/100).
Will air quality be worse tomorrow in Ōta?
On 17 July 2026, air quality conditions in Ōta will be better than today, with AQI forecast at medium at 58.4/100. Pollution peaks around 1:00 PM (O3: 58.4/100).
When is air pollution at its worst in Ōta?
In Ōta, vehicle traffic, heavy industry such as steel, cement, or petrochemical processing, together with manufacturing activity are the main local sources, with conditions worsening when dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. Heat and sunlight combine with emissions to form ozone at ground level.
Are air quality levels in Ōta 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