Worst air pollution Shinjuku, today and tomorrow
Today (10 August): Air quality in Shinjuku is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 43.9/100).
Tomorrow (11 August 2026): Air quality in Shinjuku is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 38.4/100). 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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Shinjuku's air quality reflects one of Tokyo's most intensely commercial and entertainment districts, with vehicle traffic on surrounding expressways and the extraordinary concentration of office towers, entertainment venues, and Shinjuku Station — the world's busiest railway station — generating sustained NO₂. The enclosed urban canyon geometry concentrates emissions, while the broader Tokyo metropolitan regional background elevates all readings and summer photochemical ozone from the vast Kanto corridor is the primary warm-season concern throughout the year.
Today - 10 August | Pollution peaks at 13:00
AQI:
Medium
43.9/100
PM2.5 (fine particles):
Good
11.6/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Good
7.0/100
O3 (ozone):
Medium
43.9/100
SO2 (sulfur dioxide):
Good
4.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.8/100
PM1 (ultrafine particles):
Good
12.6/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 15:00
AQI:
Fair
38.4/100
PM2.5 (fine particles):
Good
9.3/100
PM10 (coarse particles):
Good
2.5/100
NO2 (nitrogen dioxide):
Good
5.3/100
O3 (ozone):
Fair
38.4/100
SO2 (sulfur dioxide):
Good
3.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.8/100
PM1 (ultrafine particles):
Good
13.2/100
Frequently Asked Questions
Is air quality bad in Shinjuku right now?
On 10 August 2026, overall air quality in Shinjuku is medium. AQI is the main air quality indicator at 43.9/100. Pollution peaks around 1:00 PM (O3: 43.9/100).
Will air quality be worse tomorrow in Shinjuku?
On 11 August 2026, air quality conditions in Shinjuku will be worse than today, with AQI forecast at fair at 38.4/100. Pollution peaks around 3:00 PM (O3: 38.4/100).
When is air pollution at its worst in Shinjuku?
Air quality in Shinjuku tends to be worse when vehicle traffic and heavy industrial and chemical processing build up and hot, still weather settles in. Photochemical reactions in the heat push ozone levels higher. Readings are generally lower during the cooler, cloudier months.
Are air quality levels in Shinjuku 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: 9 August 2026 at 20:27 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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