Worst air pollution Azumino, today and tomorrow
Today (16 July): Air quality in Azumino is fair. NO2 and PM1 are fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 12:00 PM (O3: 45.3/100).
Tomorrow (17 July 2026): Air quality in Azumino is medium. NO2 decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 53.2/100). 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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Azumino's air quality benefits from its exceptional Nagano Prefecture Northern Alps Azumino plateau position at 550 metres with the dramatic Hotaka massif backdrop, with consistent Northern Alps and Azumino plateau breezes providing clean and reliable natural ventilation. Vehicle traffic on surrounding roads and the wasabi farming — Azumino producing Japan's finest wasabi — tourism, and light manufacturing corridor contribute modest local sources, while the extraordinary alpine setting generally maintains Azumino among Japan's more pleasantly ventilated highland agricultural city environments throughout most of the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
45.3/100
PM2.5 (fine particles):
Good
18.9/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Fair
24.4/100
O3 (ozone):
Medium
45.3/100
SO2 (sulfur dioxide):
Good
6.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.9/100
PM1 (ultrafine particles):
Fair
23.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Medium
53.2/100
PM2.5 (fine particles):
Good
9.7/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
15.5/100
O3 (ozone):
Medium
53.2/100
SO2 (sulfur dioxide):
Good
4.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
14.2/100
PM1 (ultrafine particles):
Good
13.4/100
Frequently Asked Questions
Is air quality bad in Azumino right now?
On 16 July 2026, overall air quality in Azumino is fair. NO2 is the main pollutant at 24.4/100. Pollution peaks around 12:00 PM (O3: 45.3/100).
Will air quality be worse tomorrow in Azumino?
On 17 July 2026, air quality conditions in Azumino will be better than today, with AQI forecast at medium at 53.2/100. Pollution peaks around 1:00 PM (O3: 53.2/100).
When is air pollution at its worst in Azumino?
The biggest local contributors to pollution in Azumino are vehicle traffic, textile and manufacturing operations, and farming and agricultural processing, particularly once winds are light and dispersion is poor. Local weather patterns add further variation on top of these sources. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Azumino 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