Worst air pollution Chitose, today and tomorrow
Today (21 September): Air quality in Chitose is moderate. AQI and PM2.5 are moderate; PM10, O3, and PM1 are fair; NO2, SO2, CO, and HCHO are good. Pollution peaks around 12:00 AM (PM2.5: 42.6/100).
Tomorrow (22 September 2026): Air quality in Chitose is fair. AQI improves to fair; PM2.5 decreases to good; PM10 decreases to good; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 22.4/100). 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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Chitose's air quality reflects the Hokkaido central Ishikari River plain position adjacent to New Chitose Airport — Hokkaido's main international gateway — with the airport's aviation operations and vehicle traffic on surrounding roads generating elevated NOₓ alongside the surrounding residential and manufacturing character. The clean Hokkaido boreal setting generally maintains moderate conditions, while the aviation emissions represent the most distinctive local source and wood-burning stoves during extreme Hokkaido winters add seasonal PM2.5 throughout the year.
Today - 21 September | Pollution peaks at 00:00
AQI:
Moderate
42.6/100
PM2.5 (fine particles):
Moderate
42.6/100
PM10 (coarse particles):
Fair
27.8/100
NO2 (nitrogen dioxide):
Good
8.4/100
O3 (ozone):
Fair
24.7/100
SO2 (sulfur dioxide):
Good
3.3/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
8.2/100
PM1 (ultrafine particles):
Fair
37.3/100
Levels show the poorest local air quality during the day
Tomorrow - 22 September | Pollution peaks at 13:00
AQI:
Fair
22.4/100
PM2.5 (fine particles):
Good
10.8/100
PM10 (coarse particles):
Good
7.3/100
NO2 (nitrogen dioxide):
Good
6.5/100
O3 (ozone):
Fair
22.4/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
6.8/100
Frequently Asked Questions
Is air quality bad in Chitose right now?
On 21 September 2026, overall air quality in Chitose is moderate. AQI is the main air quality indicator at 42.6/100. Pollution peaks around 12:00 AM (PM2.5: 42.6/100).
Will air quality be worse tomorrow in Chitose?
On 22 September 2026, air quality conditions in Chitose will be better than today, with AQI forecast at fair at 22.4/100. Pollution peaks around 1:00 PM (O3: 22.4/100).
When is air pollution at its worst in Chitose?
Air quality in Chitose tends to be worse when road traffic, aviation activity from the nearby airport, as well as light manufacturing build up and winds are light and dispersion is poor. Background emissions and local weather both shape how conditions change from day to day. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Chitose 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: 22 September 2026 at 02:59 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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