Worst air pollution Sapporo, today and tomorrow
Today (10 August): Air quality in Sapporo is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 24.1/100).
Tomorrow (11 August 2026): Air quality in Sapporo is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 23.7/100). 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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Sapporo's air quality is generally good by Japanese standards, with the Ishikari Bay coastal position and the surrounding Hokkaido mountains providing reliable ventilation across Japan's northernmost major city. Vehicle traffic on surrounding expressways and the tourism, food processing, and services corridor contribute modest local sources, while the excellent Sea of Japan and Pacific maritime ventilation and the clean Hokkaido boreal setting generally maintain Sapporo among Japan's cleaner major metropolitan cities throughout most of the year.
Today - 10 August | Pollution peaks at 14:00
AQI:
Fair
24.1/100
PM2.5 (fine particles):
Good
7.9/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Good
18.7/100
O3 (ozone):
Fair
24.1/100
SO2 (sulfur dioxide):
Good
4.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
9.8/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 11:00
AQI:
Fair
23.7/100
PM2.5 (fine particles):
Good
11.1/100
PM10 (coarse particles):
Good
3.1/100
NO2 (nitrogen dioxide):
Fair
21.7/100
O3 (ozone):
Fair
23.7/100
SO2 (sulfur dioxide):
Good
4.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.3/100
PM1 (ultrafine particles):
Good
14.7/100
Frequently Asked Questions
Is air quality bad in Sapporo right now?
On 10 August 2026, overall air quality in Sapporo is fair. AQI is the main air quality indicator at 24.1/100. Pollution peaks around 2:00 PM (O3: 24.1/100).
Will air quality be worse tomorrow in Sapporo?
On 11 August 2026, air quality conditions in Sapporo will be similar to today, with AQI forecast at fair at 23.7/100. Pollution peaks around 11:00 AM (O3: 23.7/100).
When is air pollution at its worst in Sapporo?
Air quality in Sapporo tends to be worse when vehicle traffic, manufacturing activity, as well as seasonal tourism traffic build up and the sea breeze weakens. Onshore breezes usually help clear the air, but pollution can build up when winds are light. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Sapporo 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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