Worst air pollution Koriyama, today and tomorrow
Today (16 July): Air quality in Koriyama is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 51.4/100).
Tomorrow (17 July 2026): Air quality in Koriyama is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 31.9/100). 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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Koriyama's air quality reflects the flat Fukushima Prefecture Abukuma River valley position, with vehicle traffic on surrounding roads and the manufacturing, food processing, and electronics corridor contributing local sources. Pacific coastal maritime breezes provide background ventilation, while the 2011 Fukushima Daiichi nuclear disaster's environmental legacy adds unique radiological context to the broader local environmental awareness and Koriyama generally maintains moderate Fukushima inland corridor readings throughout most of the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
51.4/100
PM2.5 (fine particles):
Good
12.9/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Good
3.6/100
O3 (ozone):
Medium
51.4/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
14.7/100
PM1 (ultrafine particles):
Good
16.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
31.9/100
PM2.5 (fine particles):
Good
7.1/100
PM10 (coarse particles):
Good
1.9/100
NO2 (nitrogen dioxide):
Good
4.7/100
O3 (ozone):
Fair
31.9/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
17.3/100
PM1 (ultrafine particles):
Good
9.6/100
Frequently Asked Questions
Is air quality bad in Koriyama right now?
On 16 July 2026, overall air quality in Koriyama is medium. AQI is the main air quality indicator at 51.4/100. Pollution peaks around 12:00 PM (O3: 51.4/100).
Will air quality be worse tomorrow in Koriyama?
On 17 July 2026, air quality conditions in Koriyama will be worse than today, with AQI forecast at fair at 31.9/100. Pollution peaks around 12:00 PM (O3: 31.9/100).
When is air pollution at its worst in Koriyama?
Koriyama usually sees its poorest air quality when traffic emissions together with manufacturing and food processing coincide with periods when the sea breeze weakens. Sea breezes typically keep conditions in check, except during still weather. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Koriyama 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