Worst air pollution Niigata, today and tomorrow
Today (16 July): Air quality in Niigata 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: 50.7/100).
Tomorrow (17 July 2026): Air quality in Niigata is medium. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 46.7/100). 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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Niigata's air quality benefits from its exceptional Sea of Japan and Shinano River delta coastal position, with consistent Sea of Japan and Pacific maritime breezes providing reliable ventilation. Vehicle traffic on surrounding expressways and the food processing, energy, and port corridor contribute local sources, while the outstanding coastal exposure and the Japanese Alps rising inland create dramatic topographic variation and Niigata 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 14:00
AQI:
Medium
50.7/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
11.2/100
O3 (ozone):
Medium
50.7/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.1/100
PM1 (ultrafine particles):
Good
14.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Medium
46.7/100
PM2.5 (fine particles):
Good
14.0/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
11.0/100
O3 (ozone):
Medium
46.7/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.9/100
PM1 (ultrafine particles):
Good
16.1/100
Frequently Asked Questions
Is air quality bad in Niigata right now?
On 16 July 2026, overall air quality in Niigata is medium. AQI is the main air quality indicator at 50.7/100. Pollution peaks around 2:00 PM (O3: 50.7/100).
Will air quality be worse tomorrow in Niigata?
On 17 July 2026, air quality conditions in Niigata will be similar to today, with AQI forecast at medium at 46.7/100. Pollution peaks around 12:00 PM (O3: 46.7/100).
When is air pollution at its worst in Niigata?
The biggest local contributors to pollution in Niigata are vehicle traffic, manufacturing and food processing, and fishing fleet activity, particularly once the sea breeze weakens. 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 Niigata 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