Worst air pollution Jōetsu, today and tomorrow
Today (16 July): Air quality in Jōetsu 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: 54.8/100).
Tomorrow (17 July 2026): Air quality in Jōetsu is poor. AQI worsens to poor; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 63.8/100). 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.
Jōetsu's air quality benefits from its exceptional Sea of Japan coastal position in Niigata Prefecture, with consistent Sea of Japan maritime breezes providing reliable ventilation. Vehicle traffic on surrounding roads and the rice farming, sake brewing, and manufacturing corridor contribute local sources, while the outstanding coastal exposure and the Echigo and Mikuni mountains rising inland create dramatic topographic variation and Joetsu generally maintains good to moderate conditions for a major Japanese Sea of Japan coastal city throughout most of the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
54.8/100
PM2.5 (fine particles):
Good
11.5/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Good
14.5/100
O3 (ozone):
Medium
54.8/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.6/100
PM1 (ultrafine particles):
Good
12.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Poor
63.8/100
PM2.5 (fine particles):
Good
10.7/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
13.3/100
O3 (ozone):
Poor
63.8/100
SO2 (sulfur dioxide):
Good
4.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
15.9/100
PM1 (ultrafine particles):
Good
14.4/100
Frequently Asked Questions
Is air quality bad in Jōetsu right now?
On 16 July 2026, overall air quality in Jōetsu is medium. AQI is the main air quality indicator at 54.8/100. Pollution peaks around 12:00 PM (O3: 54.8/100).
Will air quality be worse tomorrow in Jōetsu?
On 17 July 2026, air quality conditions in Jōetsu will be worse than today, with AQI forecast at poor at 63.8/100. Pollution peaks around 12:00 PM (O3: 63.8/100).
When is air pollution at its worst in Jōetsu?
The biggest local contributors to pollution in Jōetsu are traffic on the surrounding roads, textile and manufacturing operations, as well as farming and agricultural processing, particularly once onshore breezes fall calm. Sea breezes typically keep conditions in check, except during still weather. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Jōetsu 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