Worst air pollution Kōka, today and tomorrow
Today (16 July): Air quality in Kōka is poor. AQI and O3 are poor; NO2 and PM1 are fair; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 71.1/100).
Tomorrow (17 July 2026): Air quality in Kōka is poor. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 5:00 PM (O3: 71.7/100). 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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Kōka's air quality benefits from its exceptional Shiga Prefecture Konan River valley position adjacent to Shigaraki pottery heritage area, with vehicle traffic on surrounding roads and the Shigaraki pottery — one of Japan's six ancient kiln traditions — and agricultural corridor contributing distinctive kiln dust and ceramic fire emissions alongside primary vehicle sources. The surrounding Suzuka and Ibuki mountain ranges create topographic variation, while Lake Biwa's regional humidity provides natural moisture and the pottery kiln operations' distinctive wood fire emissions represent Koka's most culturally unique air quality characteristic throughout the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Poor
71.1/100
PM2.5 (fine particles):
Good
16.9/100
PM10 (coarse particles):
Good
5.0/100
NO2 (nitrogen dioxide):
Fair
30.5/100
O3 (ozone):
Poor
71.1/100
SO2 (sulfur dioxide):
Good
20.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.3/100
PM1 (ultrafine particles):
Fair
20.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 17:00
AQI:
Poor
71.7/100
PM2.5 (fine particles):
Fair
20.5/100
PM10 (coarse particles):
Good
5.9/100
NO2 (nitrogen dioxide):
Fair
26.2/100
O3 (ozone):
Poor
71.7/100
SO2 (sulfur dioxide):
Good
15.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.2/100
PM1 (ultrafine particles):
Fair
24.8/100
Frequently Asked Questions
Is air quality bad in Kōka right now?
On 16 July 2026, overall air quality in Kōka is poor. AQI is the main air quality indicator at 71.1/100. Pollution peaks around 2:00 PM (O3: 71.1/100).
Will air quality be worse tomorrow in Kōka?
On 17 July 2026, air quality conditions in Kōka will be similar to today, with AQI forecast at poor at 71.7/100. Pollution peaks around 5:00 PM (O3: 71.7/100).
When is air pollution at its worst in Kōka?
Air quality in Kōka tends to be worse when traffic emissions, manufacturing activity, as well as farming and agricultural processing build up and windblown dust events occur. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. These episodes tend to cluster in spring and autumn.
Are air quality levels in Kōka 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