Worst air pollution Higashi-Matsuyama, today and tomorrow
Today (13 August): Air quality in Higashi-Matsuyama is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 18.5/100).
Tomorrow (14 August 2026): Air quality in Higashi-Matsuyama is good. All pollutants stay as today. Pollution peaks around 3:00 PM (O3: 16.5/100). 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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Higashi-Matsuyama's air quality reflects the flat Saitama northern Kanto Plain position adjacent to the Musashino Hills, with vehicle traffic on surrounding roads and the manufacturing, residential, and commercial character contributing local sources. The flat Kanto Plain allows reasonable dispersal, while summer photochemical ozone from the broader Kanto corridor is the primary warm-season concern and Higashi-Matsuyama generally maintains moderate Japanese inland Kanto plain city readings throughout most of the year.
Today - 13 August | Pollution peaks at 13:00
AQI:
Good
18.5/100
PM2.5 (fine particles):
Good
4.7/100
PM10 (coarse particles):
Good
1.4/100
NO2 (nitrogen dioxide):
Good
13.9/100
O3 (ozone):
Good
18.5/100
SO2 (sulfur dioxide):
Good
4.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Good
6.0/100
Levels show the poorest local air quality during the day
Tomorrow - 14 August | Pollution peaks at 15:00
AQI:
Good
16.5/100
PM2.5 (fine particles):
Good
4.8/100
PM10 (coarse particles):
Good
1.4/100
NO2 (nitrogen dioxide):
Good
15.2/100
O3 (ozone):
Good
16.5/100
SO2 (sulfur dioxide):
Good
3.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Good
6.4/100
Frequently Asked Questions
Is air quality bad in Higashi-Matsuyama right now?
On 13 August 2026, overall air quality in Higashi-Matsuyama is good. AQI is the main air quality indicator at 18.5/100. Pollution peaks around 1:00 PM (O3: 18.5/100).
Will air quality be worse tomorrow in Higashi-Matsuyama?
On 14 August 2026, air quality conditions in Higashi-Matsuyama will be similar to today, with AQI forecast at good at 16.5/100. Pollution peaks around 3:00 PM (O3: 16.5/100).
When is air pollution at its worst in Higashi-Matsuyama?
Higashi-Matsuyama usually sees its poorest air quality when road traffic, steel, cement, and chemical production, along with light manufacturing coincide with periods when summer heat and strong sunlight build up. Photochemical reactions in the heat push ozone levels higher. Cooler temperatures for the rest of the year keep this in check.
Are air quality levels in Higashi-Matsuyama 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: 13 August 2026 at 14:33 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.
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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