Worst air pollution Kōenchō, today and tomorrow
Today (16 July): Air quality in Kōenchō is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 AM (O3: 24.9/100).
Tomorrow (17 July 2026): Air quality in Kōenchō is good. AQI improves to good; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 19.2/100). 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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Kōenchō in Hokkaido reflects the Hokkaido regional position, with vehicle traffic on surrounding roads and very modest local operations contributing minimal sources. The outstanding Hokkaido boreal setting and clean subarctic maritime climate generally maintain excellent to good conditions, while wood-burning stoves during the extreme Hokkaido winters add seasonal PM2.5 and the area generally maintains among Japan's cleaner regional environments throughout most of the year.
Today - 16 July | Pollution peaks at 05:00
AQI:
Fair
24.9/100
PM2.5 (fine particles):
Good
7.3/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Good
15.9/100
O3 (ozone):
Fair
24.9/100
SO2 (sulfur dioxide):
Good
6.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
7.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Good
19.2/100
PM2.5 (fine particles):
Good
5.6/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Good
17.3/100
O3 (ozone):
Good
19.2/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
14.9/100
PM1 (ultrafine particles):
Good
7.3/100
Frequently Asked Questions
Is air quality bad in Kōenchō right now?
On 16 July 2026, overall air quality in Kōenchō is fair. AQI is the main air quality indicator at 24.9/100. Pollution peaks around 5:00 AM (O3: 24.9/100).
Will air quality be worse tomorrow in Kōenchō?
On 17 July 2026, air quality conditions in Kōenchō will be better than today, with AQI forecast at good at 19.2/100. Pollution peaks around 1:00 PM (O3: 19.2/100).
When is air pollution at its worst in Kōenchō?
Kōenchō usually sees its poorest air quality when traffic emissions along with charcoal and wood-burning coincide with periods when onshore breezes fall calm. Sea breezes typically keep conditions in check, except during still weather. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Kōenchō 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