Worst air pollution Hamura, today and tomorrow
Today (10 August): Air quality in Hamura is poor. AQI and O3 are poor; PM2.5 and PM1 are fair; PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 66.1/100).
Tomorrow (11 August 2026): Air quality in Hamura 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 3:00 PM (O3: 47.7/100). 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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Hamura's air quality reflects the western Tokyo metropolitan Tama River valley position adjacent to the US Air Force Yokota Air Base approach corridor, with vehicle traffic on surrounding roads and the manufacturing and residential character contributing local sources alongside the aviation background. The flat Kanto Plain allows reasonable dispersal, while the military aviation operations and summer photochemical ozone are the primary air quality concerns throughout most of the year.
Today - 10 August | Pollution peaks at 15:00
AQI:
Poor
66.1/100
PM2.5 (fine particles):
Fair
24.0/100
PM10 (coarse particles):
Good
6.7/100
NO2 (nitrogen dioxide):
Good
16.7/100
O3 (ozone):
Poor
66.1/100
SO2 (sulfur dioxide):
Good
10.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.1/100
PM1 (ultrafine particles):
Fair
30.0/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 15:00
AQI:
Medium
47.7/100
PM2.5 (fine particles):
Good
9.7/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
17.4/100
O3 (ozone):
Medium
47.7/100
SO2 (sulfur dioxide):
Good
11.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.6/100
PM1 (ultrafine particles):
Good
13.8/100
Frequently Asked Questions
Is air quality bad in Hamura right now?
On 10 August 2026, overall air quality in Hamura is poor. AQI is the main air quality indicator at 66.1/100. Pollution peaks around 3:00 PM (O3: 66.1/100).
Will air quality be worse tomorrow in Hamura?
On 11 August 2026, air quality conditions in Hamura will be better than today, with AQI forecast at medium at 47.7/100. Pollution peaks around 3:00 PM (O3: 47.7/100).
When is air pollution at its worst in Hamura?
Pollution in Hamura typically rises when traffic emissions, military aviation activity, and steel, cement, and chemical production combine, especially once hot, still weather settles in. Strong sunlight reacting with local emissions drives up ground-level ozone. This is far less of an issue outside the warmer months.
Are air quality levels in Hamura 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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