Worst air pollution Oyama, today and tomorrow
Today (10 August): Air quality in Oyama is fair. AQI, NO2, O3, and PM1 are fair; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 11:00 AM (O3: 30.3/100).
Tomorrow (11 August 2026): Air quality in Oyama is fair. PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 34.1/100). 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 - 10 August | Pollution peaks at 11:00
AQI:
Fair
30.3/100
PM2.5 (fine particles):
Good
18.6/100
PM10 (coarse particles):
Good
5.7/100
NO2 (nitrogen dioxide):
Fair
27.6/100
O3 (ozone):
Fair
30.3/100
SO2 (sulfur dioxide):
Good
5.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.3/100
PM1 (ultrafine particles):
Fair
22.3/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 12:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Good
9.1/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Fair
24.1/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
4.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.1/100
PM1 (ultrafine particles):
Good
13.1/100
Frequently Asked Questions
Is air quality bad in Oyama right now?
On 10 August 2026, overall air quality in Oyama is fair. AQI is the main air quality indicator at 30.3/100. Pollution peaks around 11:00 AM (O3: 30.3/100).
Will air quality be worse tomorrow in Oyama?
On 11 August 2026, air quality conditions in Oyama will be similar to today, with AQI forecast at fair at 34.1/100. Pollution peaks around 12:00 PM (O3: 34.1/100).
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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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