Worst air pollution Ashikaga, today and tomorrow
Today (16 July): Air quality in Ashikaga is poor. AQI and O3 are poor; PM2.5, NO2, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 68.8/100).
Tomorrow (17 July 2026): Air quality in Ashikaga is fair. AQI improves to medium; PM2.5 decreases to good; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 57.0/100). 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
Use our Strava plugin to check your own exposure.
Ashikaga's air quality reflects the flat Tochigi Prefecture Watarase River plain position, with vehicle traffic on surrounding roads and the textile — Ashikaga being the birthplace of Japanese silk weaving — and manufacturing corridor contributing distinctive textile dust and chemical emissions. The flat Kanto Plain allows reasonable dispersal, while summer photochemical ozone from the broader Kanto corridor is the primary warm-season concern and Ashikaga generally maintains moderate Japanese inland Kanto plain readings throughout most of the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Poor
68.8/100
PM2.5 (fine particles):
Fair
21.3/100
PM10 (coarse particles):
Good
5.8/100
NO2 (nitrogen dioxide):
Fair
27.4/100
O3 (ozone):
Poor
68.8/100
SO2 (sulfur dioxide):
Good
13.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.0/100
PM1 (ultrafine particles):
Fair
26.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Medium
57.0/100
PM2.5 (fine particles):
Good
17.3/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Fair
30.1/100
O3 (ozone):
Medium
57.0/100
SO2 (sulfur dioxide):
Good
15.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.3/100
PM1 (ultrafine particles):
Fair
23.2/100
Frequently Asked Questions
Is air quality bad in Ashikaga right now?
On 16 July 2026, overall air quality in Ashikaga is poor. AQI is the main air quality indicator at 68.8/100. Pollution peaks around 2:00 PM (O3: 68.8/100).
Will air quality be worse tomorrow in Ashikaga?
On 17 July 2026, air quality conditions in Ashikaga will be better than today, with NO2 forecast at fair at 30.1/100. Pollution peaks around 12:00 PM (O3: 57.0/100).
When is air pollution at its worst in Ashikaga?
The biggest local contributors to pollution in Ashikaga are traffic on the surrounding roads, heavy industrial and chemical processing, along with manufacturing and food processing, particularly once dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. Photochemical reactions in the heat push ozone levels higher.
Are air quality levels in Ashikaga 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.
Check air quality in other popular cities:
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