Worst air pollution Tsubame, today and tomorrow
Today (16 July): Air quality in Tsubame is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 56.3/100).
Tomorrow (17 July 2026): Air quality in Tsubame is fair. PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 51.6/100). 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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Tsubame's air quality reflects the Niigata Prefecture Shiotsuse River valley position, with vehicle traffic on surrounding roads and the metalworking — Tsubame being Japan's western cutlery and metalwork capital alongside Sanjō — generating elevated metal dust PM10 alongside primary vehicle sources. The metalworking operations' distinctive metal particulate emissions represent Tsubame's most locally unique industrial air quality signature, while consistent Sea of Japan maritime breezes provide background ventilation and the area generally maintains moderate conditions throughout most of the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
56.3/100
PM2.5 (fine particles):
Good
13.1/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Good
0.7/100
O3 (ozone):
Medium
56.3/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.8/100
PM1 (ultrafine particles):
Good
16.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Medium
51.6/100
PM2.5 (fine particles):
Good
15.6/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
0.7/100
O3 (ozone):
Medium
51.6/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.4/100
PM1 (ultrafine particles):
Fair
20.4/100
Frequently Asked Questions
Is air quality bad in Tsubame right now?
On 16 July 2026, overall air quality in Tsubame is medium. AQI is the main air quality indicator at 56.3/100. Pollution peaks around 12:00 PM (O3: 56.3/100).
Will air quality be worse tomorrow in Tsubame?
On 17 July 2026, air quality conditions in Tsubame will be worse than today, with PM1 forecast at fair at 20.4/100. Pollution peaks around 12:00 PM (O3: 51.6/100).
When is air pollution at its worst in Tsubame?
Tsubame usually sees its poorest air quality when traffic on the surrounding roads coincides with periods when dry, windy weather picks up. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Maritime airflow normally ventilates the area well, though calmer spells let levels rise.
Are air quality levels in Tsubame 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