Worst air pollution Oyama, today and tomorrow
Today (16 July): Air quality in Oyama is poor. AQI and O3 are poor; NO2 is fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 63.5/100).
Tomorrow (17 July 2026): Air quality in Oyama is fair. AQI improves to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 29.8/100). 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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Oyama's air quality reflects the flat Tochigi Prefecture northern Kanto Plain position, with vehicle traffic on surrounding roads and the manufacturing, food processing, and industrial corridor contributing local sources. The flat Kanto Plain allows reasonable dispersal, while the broader Tokyo metropolitan regional emissions contribute background and summer photochemical ozone from the Kanto corridor is the primary warm-season concern and Oyama generally maintains moderate Japanese inland Kanto plain readings throughout most of the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Poor
63.5/100
PM2.5 (fine particles):
Good
15.1/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Poor
63.5/100
SO2 (sulfur dioxide):
Good
11.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.9/100
PM1 (ultrafine particles):
Good
18.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Fair
29.8/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Fair
20.0/100
O3 (ozone):
Fair
29.8/100
SO2 (sulfur dioxide):
Good
10.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.7/100
PM1 (ultrafine particles):
Good
16.8/100
Frequently Asked Questions
Is air quality bad in Oyama right now?
On 16 July 2026, overall air quality in Oyama is poor. AQI is the main air quality indicator at 63.5/100. Pollution peaks around 1:00 PM (O3: 63.5/100).
Will air quality be worse tomorrow in Oyama?
On 17 July 2026, air quality conditions in Oyama will be better than today, with AQI forecast at fair at 29.8/100. Pollution peaks around 1:00 PM (O3: 29.8/100).
When is air pollution at its worst in Oyama?
In Oyama, road traffic, petrochemical and refining operations, together with manufacturing activity are the main local sources, with conditions worsening when windblown dust events occur. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Heat and sunlight combine with emissions to form ozone at ground level.
Are air quality levels in Oyama 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