Worst air pollution Ōtawara, today and tomorrow
Today (16 July): Air quality in Ōtawara is fair. NO2 and PM1 are fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 12:00 PM (O3: 54.9/100).
Tomorrow (17 July 2026): Air quality in Ōtawara is fair. AQI worsens to fair; O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 28.5/100). 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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Ōtawara's air quality reflects the flat Tochigi Prefecture northern Naka River plain position, with vehicle traffic on surrounding roads and the manufacturing, food processing, and agricultural corridor contributing local sources. The flat Kanto Plain allows reasonable dispersal, while summer photochemical ozone from the broader Kanto corridor is the primary warm-season concern and Otawara generally maintains moderate Japanese inland Tochigi plain city readings throughout most of the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
54.9/100
PM2.5 (fine particles):
Good
18.3/100
PM10 (coarse particles):
Good
5.0/100
NO2 (nitrogen dioxide):
Fair
22.2/100
O3 (ozone):
Medium
54.9/100
SO2 (sulfur dioxide):
Good
10.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.9/100
PM1 (ultrafine particles):
Fair
23.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Fair
28.5/100
PM2.5 (fine particles):
Good
8.3/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Fair
21.9/100
O3 (ozone):
Fair
28.5/100
SO2 (sulfur dioxide):
Good
6.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.1/100
PM1 (ultrafine particles):
Good
11.7/100
Frequently Asked Questions
Is air quality bad in Ōtawara right now?
On 16 July 2026, overall air quality in Ōtawara is fair. PM1 is the main pollutant at 23.1/100. Pollution peaks around 12:00 PM (O3: 54.9/100).
Will air quality be worse tomorrow in Ōtawara?
On 17 July 2026, air quality conditions in Ōtawara will be similar to today, with AQI forecast at fair at 28.5/100. Pollution peaks around 1:00 PM (O3: 28.5/100).
When is air pollution at its worst in Ōtawara?
In Ōtawara, traffic emissions, heavy industrial and chemical processing, as well as textile and manufacturing operations are the main local sources, with conditions worsening when summer heat and strong sunlight build up. Photochemical reactions in the heat push ozone levels higher. Readings are generally lower during the cooler, cloudier months.
Are air quality levels in Ōtawara 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