Worst air pollution Ashikaga, today and tomorrow
Today (10 August): Air quality in Ashikaga is fair. AQI, O3, and PM1 are fair; PM2.5, PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 37.8/100).
Tomorrow (11 August 2026): Air quality in Ashikaga is fair. PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 38.0/100). 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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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 - 10 August | Pollution peaks at 13:00
AQI:
Fair
37.8/100
PM2.5 (fine particles):
Good
16.1/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Good
19.0/100
O3 (ozone):
Fair
37.8/100
SO2 (sulfur dioxide):
Good
5.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.5/100
PM1 (ultrafine particles):
Fair
21.4/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 12:00
AQI:
Fair
38.0/100
PM2.5 (fine particles):
Good
5.5/100
PM10 (coarse particles):
Good
1.7/100
NO2 (nitrogen dioxide):
Good
12.8/100
O3 (ozone):
Fair
38.0/100
SO2 (sulfur dioxide):
Good
4.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.1/100
PM1 (ultrafine particles):
Good
6.4/100
Frequently Asked Questions
Is air quality bad in Ashikaga right now?
On 10 August 2026, overall air quality in Ashikaga is fair. AQI is the main air quality indicator at 37.8/100. Pollution peaks around 1:00 PM (O3: 37.8/100).
Will air quality be worse tomorrow in Ashikaga?
On 11 August 2026, air quality conditions in Ashikaga will be similar to today, with AQI forecast at fair at 38.0/100. Pollution peaks around 12:00 PM (O3: 38.0/100).
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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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