Worst air pollution Sayama, today and tomorrow
Today (10 August): Air quality in Sayama is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 61.7/100).
Tomorrow (11 August 2026): Air quality in Sayama is medium. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 45.9/100). 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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Sayama in Osaka reflects the Osaka Prefecture southeastern corridor in Osaka-Sayama city adjacent to the Kongo Mountains, with vehicle traffic on surrounding roads and the manufacturing and residential character contributing local sources. Osaka Bay breezes provide limited maritime ventilation, while the broader Kinki metropolitan regional background maintains moderate Osaka southeastern suburban readings throughout most of the year.
Today - 10 August | Pollution peaks at 13:00
AQI:
Poor
61.7/100
PM2.5 (fine particles):
Good
14.0/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Good
17.1/100
O3 (ozone):
Poor
61.7/100
SO2 (sulfur dioxide):
Good
16.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.6/100
PM1 (ultrafine particles):
Good
18.4/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 13:00
AQI:
Medium
45.9/100
PM2.5 (fine particles):
Good
10.7/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Good
16.1/100
O3 (ozone):
Medium
45.9/100
SO2 (sulfur dioxide):
Good
11.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.9/100
PM1 (ultrafine particles):
Good
12.0/100
Frequently Asked Questions
Is air quality bad in Sayama right now?
On 10 August 2026, overall air quality in Sayama is poor. AQI is the main air quality indicator at 61.7/100. Pollution peaks around 1:00 PM (O3: 61.7/100).
Will air quality be worse tomorrow in Sayama?
On 11 August 2026, air quality conditions in Sayama will be better than today, with AQI forecast at medium at 45.9/100. Pollution peaks around 1:00 PM (O3: 45.9/100).
When is air pollution at its worst in Sayama?
In Sayama, road traffic and light manufacturing are the main local sources, with conditions worsening when maritime winds die down. Onshore breezes usually help clear the air, but pollution can build up when winds are light. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Sayama 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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