Worst air pollution Sumida, today and tomorrow
Today (16 July): Air quality in Sumida is fair. PM2.5, O3, SO2, and PM1 are fair; AQI and NO2 are medium; PM10, CO, and HCHO are good. Pollution peaks around 11:00 PM (NO2: 46.7/100).
Tomorrow (17 July 2026): Air quality in Sumida is fair. O3 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 AM (NO2: 51.0/100). 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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Sumida's air quality reflects the eastern Tokyo metropolitan Sumida River corridor adjacent to Asakusa, with vehicle traffic on surrounding expressways and the dense urban commercial, entertainment, and residential character contributing elevated NOₓ. The Sumida River provides limited ventilation, 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 Sumida generally maintains moderate Tokyo eastern urban corridor readings throughout most of the year.
Today - 16 July | Pollution peaks at 23:00
AQI:
Medium
46.7/100
PM2.5 (fine particles):
Fair
21.3/100
PM10 (coarse particles):
Good
6.2/100
NO2 (nitrogen dioxide):
Medium
46.7/100
O3 (ozone):
Fair
28.9/100
SO2 (sulfur dioxide):
Fair
32.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.1/100
PM1 (ultrafine particles):
Fair
27.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 03:00
AQI:
Medium
51.0/100
PM2.5 (fine particles):
Fair
22.4/100
PM10 (coarse particles):
Good
7.0/100
NO2 (nitrogen dioxide):
Medium
51.0/100
O3 (ozone):
Good
16.0/100
SO2 (sulfur dioxide):
Fair
38.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Fair
25.6/100
Frequently Asked Questions
Is air quality bad in Sumida right now?
On 16 July 2026, overall air quality in Sumida is fair. SO2 is the main pollutant at 32.0/100. Pollution peaks around 11:00 PM (NO2: 46.7/100).
Will air quality be worse tomorrow in Sumida?
On 17 July 2026, air quality conditions in Sumida will be similar to today, with SO2 forecast at fair at 38.8/100. Pollution peaks around 3:00 AM (NO2: 51.0/100).
When is air pollution at its worst in Sumida?
Air quality in Sumida tends to be worse when traffic emissions as well as petrochemical and refining operations build up and summer heat and strong sunlight build up. Photochemical reactions in the heat push ozone levels higher. Readings are generally lower during the cooler, cloudier months.
Are air quality levels in Sumida 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