Worst air pollution Seto, today and tomorrow
Today (16 July): Air quality in Seto is poor. AQI and O3 are poor; PM1 is fair; PM2.5, PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 12:00 PM (O3: 68.6/100).
Tomorrow (17 July 2026): Air quality in Seto is very poor. AQI worsens to very poor; O3 increases to very poor; all other pollutants stay as today. Pollution peaks around 2:00 PM (O3: 80.9/100). 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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Seto's air quality reflects the Aichi Prefecture Seto River valley position adjacent to Nagoya — Seto being the birthplace of Japanese ceramics — with vehicle traffic on surrounding roads and the ceramic manufacturing operations generating elevated ceramic kiln dust PM10 and SO₂ alongside vehicle sources. The surrounding Seto valley hills create topographic variation, while summer photochemical ozone from the Chukyo corridor and the ceramics industry's distinctive kiln emissions represent Seto's most locally unique air quality contributions throughout the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Poor
68.6/100
PM2.5 (fine particles):
Good
17.5/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Good
16.6/100
O3 (ozone):
Poor
68.6/100
SO2 (sulfur dioxide):
Good
8.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.0/100
PM1 (ultrafine particles):
Fair
20.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 14:00
AQI:
Very poor
80.9/100
PM2.5 (fine particles):
Good
15.0/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
16.9/100
O3 (ozone):
Very poor
80.9/100
SO2 (sulfur dioxide):
Good
7.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
14.9/100
PM1 (ultrafine particles):
Fair
20.2/100
Frequently Asked Questions
Is air quality bad in Seto right now?
On 16 July 2026, overall air quality in Seto is poor. AQI is the main air quality indicator at 68.6/100. Pollution peaks around 12:00 PM (O3: 68.6/100).
Will air quality be worse tomorrow in Seto?
On 17 July 2026, air quality conditions in Seto will be worse than today, with AQI forecast at very poor at 80.9/100. Pollution peaks around 2:00 PM (O3: 80.9/100).
When is air pollution at its worst in Seto?
The biggest local contributors to pollution in Seto are traffic on the surrounding roads, heavy industry such as steel, cement, or petrochemical processing, along with textile and manufacturing operations, particularly once dry, windy weather picks up. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Heat and sunlight combine with emissions to form ozone at ground level.
Are air quality levels in Seto 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