Worst air pollution Sagamihara, today and tomorrow
Today (16 July): Air quality in Sagamihara is poor. AQI and O3 are poor; PM2.5 and PM1 are fair; PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 75.4/100).
Tomorrow (17 July 2026): Air quality in Sagamihara is fair. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 45.8/100). 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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Sagamihara's air quality reflects the Kanagawa Prefecture Sagami River valley position in the Tokyo-Yokohama metropolitan corridor, with vehicle traffic on surrounding expressways and the manufacturing, defence, and logistics corridor contributing local sources. The flat Kanto Plain allows reasonable dispersal, while the broader Tokyo metropolitan regional emissions elevate background and summer photochemical ozone from the vast Kanto corridor is the primary warm-season concern throughout the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Poor
75.4/100
PM2.5 (fine particles):
Fair
27.1/100
PM10 (coarse particles):
Good
7.6/100
NO2 (nitrogen dioxide):
Good
18.1/100
O3 (ozone):
Poor
75.4/100
SO2 (sulfur dioxide):
Good
12.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.3/100
PM1 (ultrafine particles):
Fair
32.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Medium
45.8/100
PM2.5 (fine particles):
Fair
25.6/100
PM10 (coarse particles):
Good
7.1/100
NO2 (nitrogen dioxide):
Good
17.4/100
O3 (ozone):
Medium
45.8/100
SO2 (sulfur dioxide):
Good
15.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
18.0/100
PM1 (ultrafine particles):
Fair
31.9/100
Frequently Asked Questions
Is air quality bad in Sagamihara right now?
On 16 July 2026, overall air quality in Sagamihara is poor. AQI is the main air quality indicator at 75.4/100. Pollution peaks around 1:00 PM (O3: 75.4/100).
Will air quality be worse tomorrow in Sagamihara?
On 17 July 2026, air quality conditions in Sagamihara will be better than today, with PM1 forecast at fair at 31.9/100. Pollution peaks around 12:00 PM (O3: 45.8/100).
When is air pollution at its worst in Sagamihara?
Pollution in Sagamihara typically rises when road traffic, heavy industry such as steel, cement, or petrochemical processing, along with light manufacturing combine, especially once 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 Sagamihara 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