Worst air pollution Toyokawa, today and tomorrow
Today (10 August): Air quality in Toyokawa is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 38.1/100).
Tomorrow (11 August 2026): Air quality in Toyokawa is poor. AQI worsens to poor; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 61.5/100). 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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Toyokawa's air quality reflects the Aichi Prefecture Toyo River coastal plain position adjacent to Toyohashi, with vehicle traffic on surrounding roads and the Japan Ground Self-Defense Force Toyokawa base, manufacturing, and agricultural corridor contributing elevated military and vehicle NOₓ alongside primary vehicle sources. Consistent Mikawa Bay maritime breezes provide coastal ventilation, while the military base's operations represent the most distinctive local emission source and the area generally maintains moderate Aichi eastern corridor readings throughout most of the year.
Today - 10 August | Pollution peaks at 14:00
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Good
9.9/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
3.5/100
O3 (ozone):
Fair
38.1/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.4/100
PM1 (ultrafine particles):
Good
10.8/100
Levels show the poorest local air quality during the day
Tomorrow - 11 August | Pollution peaks at 13:00
AQI:
Poor
61.5/100
PM2.5 (fine particles):
Good
8.6/100
PM10 (coarse particles):
Good
2.8/100
NO2 (nitrogen dioxide):
Good
3.2/100
O3 (ozone):
Poor
61.5/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Good
8.6/100
Frequently Asked Questions
Is air quality bad in Toyokawa right now?
On 10 August 2026, overall air quality in Toyokawa is fair. AQI is the main air quality indicator at 38.1/100. Pollution peaks around 2:00 PM (O3: 38.1/100).
Will air quality be worse tomorrow in Toyokawa?
On 11 August 2026, air quality conditions in Toyokawa will be worse than today, with AQI forecast at poor at 61.5/100. Pollution peaks around 1:00 PM (O3: 61.5/100).
When is air pollution at its worst in Toyokawa?
Pollution in Toyokawa typically rises when vehicle traffic, aircraft operations at the local air base, and manufacturing and food processing combine, especially once maritime winds die down. Maritime airflow normally ventilates the area well, though calmer spells let levels rise. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Toyokawa 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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