Worst air pollution Sanjō, today and tomorrow
Today (16 July): Air quality in Sanjō is fair. NO2 and PM1 are fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 12:00 PM (O3: 56.3/100).
Tomorrow (17 July 2026): Air quality in Sanjō is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 51.6/100). 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.
Sanjō's air quality reflects the flat Niigata Prefecture Kariya River plain position, with vehicle traffic on surrounding roads and the metalworking — Sanjō being Japan's hardware and tools capital — and manufacturing corridor contributing elevated metal dust PM10 alongside primary vehicle sources. The metalworking operations' distinctive metal particulate emissions represent Sanjō's most locally unique industrial air quality signature, while consistent Sea of Japan maritime breezes provide background ventilation and the area generally maintains moderate to good conditions throughout most of the year.
Today - 16 July | Pollution peaks at 12:00
AQI:
Medium
56.3/100
PM2.5 (fine particles):
Good
16.8/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Fair
20.1/100
O3 (ozone):
Medium
56.3/100
SO2 (sulfur dioxide):
Good
6.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.8/100
PM1 (ultrafine particles):
Fair
20.3/100
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
20.0/100
PM10 (coarse particles):
Good
5.5/100
NO2 (nitrogen dioxide):
Fair
20.1/100
O3 (ozone):
Medium
51.6/100
SO2 (sulfur dioxide):
Good
7.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.4/100
PM1 (ultrafine particles):
Fair
24.5/100
Frequently Asked Questions
Is air quality bad in Sanjō right now?
On 16 July 2026, overall air quality in Sanjō is fair. PM1 is the main pollutant at 20.3/100. Pollution peaks around 12:00 PM (O3: 56.3/100).
Will air quality be worse tomorrow in Sanjō?
On 17 July 2026, air quality conditions in Sanjō will be similar to today, with PM1 forecast at fair at 24.5/100. Pollution peaks around 12:00 PM (O3: 51.6/100).
When is air pollution at its worst in Sanjō?
Pollution in Sanjō typically rises when vehicle traffic along with light manufacturing combine, especially once dry, windy weather picks up. Strong seasonal winds can lift dust from the surrounding dry terrain and push particulate levels sharply higher. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Sanjō 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