Worst air pollution Tosu, today and tomorrow
Today (16 July): Air quality in Tosu is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 55.8/100).
Tomorrow (17 July 2026): Air quality in Tosu is medium. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 52.1/100). 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.
Tosu's air quality reflects the Saga Prefecture northern Kyushu Chikugo River plain position adjacent to the Tosu Premium Outlets highway interchange, with vehicle traffic on surrounding roads and the logistics, automotive parts, and manufacturing corridor contributing local sources. Consistent Ariake Sea maritime breezes provide background ventilation, while transboundary Chinese and Korean industrial pollution on westerly winds is the primary regional background concern and Tosu generally maintains moderate Fukuoka-Saga metropolitan corridor readings throughout most of the year.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
55.8/100
PM2.5 (fine particles):
Good
8.6/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
4.0/100
O3 (ozone):
Medium
55.8/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.7/100
PM1 (ultrafine particles):
Good
9.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Medium
52.1/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Good
10.0/100
O3 (ozone):
Medium
52.1/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.1/100
PM1 (ultrafine particles):
Good
11.4/100
Frequently Asked Questions
Is air quality bad in Tosu right now?
On 16 July 2026, overall air quality in Tosu is medium. AQI is the main air quality indicator at 55.8/100. Pollution peaks around 2:00 PM (O3: 55.8/100).
Will air quality be worse tomorrow in Tosu?
On 17 July 2026, air quality conditions in Tosu will be similar to today, with AQI forecast at medium at 52.1/100. Pollution peaks around 1:00 PM (O3: 52.1/100).
When is air pollution at its worst in Tosu?
Air quality in Tosu tends to be worse when road traffic as well as light manufacturing build up and dry spells bring strong winds. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Onshore breezes usually help clear the air, but pollution can build up when winds are light.
Are air quality levels in Tosu 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