Worst air pollution Toshima, today and tomorrow
Today (16 July): Air quality in Toshima is fair. PM2.5, SO2, and PM1 are fair; AQI, NO2, and O3 are medium; PM10, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 52.8/100).
Tomorrow (17 July 2026): Air quality in Toshima is fair. O3 decreases to good; SO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 5:00 AM (NO2: 45.7/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Toshima's air quality reflects the northern Tokyo metropolitan commercial and residential district adjacent to Ikebukuro, with vehicle traffic on surrounding expressways and the dense urban commercial, entertainment, and residential character contributing elevated NOₓ. 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 and Toshima generally maintains moderate Tokyo northern commercial district readings throughout most of the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Medium
52.8/100
PM2.5 (fine particles):
Fair
26.0/100
PM10 (coarse particles):
Good
7.5/100
NO2 (nitrogen dioxide):
Medium
43.2/100
O3 (ozone):
Medium
52.8/100
SO2 (sulfur dioxide):
Fair
30.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.5/100
PM1 (ultrafine particles):
Fair
31.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 05:00
AQI:
Medium
45.7/100
PM2.5 (fine particles):
Fair
26.5/100
PM10 (coarse particles):
Good
7.4/100
NO2 (nitrogen dioxide):
Medium
45.7/100
O3 (ozone):
Good
15.4/100
SO2 (sulfur dioxide):
Medium
42.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.4/100
PM1 (ultrafine particles):
Fair
33.3/100
Frequently Asked Questions
Is air quality bad in Toshima right now?
On 16 July 2026, overall air quality in Toshima is fair. PM1 is the main pollutant at 31.7/100. Pollution peaks around 1:00 PM (O3: 52.8/100).
Will air quality be worse tomorrow in Toshima?
On 17 July 2026, air quality conditions in Toshima will be similar to today, with PM1 forecast at fair at 33.3/100. Pollution peaks around 5:00 AM (NO2: 45.7/100).
When is air pollution at its worst in Toshima?
Air quality in Toshima tends to be worse when traffic on the surrounding roads along with petrochemical and refining operations build up and warm, sunny weather takes hold. 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 Toshima 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