Worst air pollution Saijō, today and tomorrow
Today (16 July): Air quality in Saijō is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 68.8/100).
Tomorrow (17 July 2026): Air quality in Saijō is very poor. AQI worsens to very poor; O3 increases to very poor; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 100/100). 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
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Saijō's air quality reflects the Ehime Prefecture Seto Inland Sea coastal position at the Nishiseto Expressway corridor, with vehicle traffic on surrounding roads and the semiconductor — Saijo hosting major Renesas Electronics operations — and manufacturing corridor contributing elevated industrial emissions. Consistent Seto Inland Sea maritime breezes provide coastal ventilation, while the semiconductor industrial character represents Saijo's most distinctive local emission source and the coastal position generally maintains moderate Ehime Seto Inland Sea corridor readings throughout most of the year.
Today - 16 July | Pollution peaks at 16:00
AQI:
Poor
68.8/100
PM2.5 (fine particles):
Good
9.1/100
PM10 (coarse particles):
Good
3.1/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Poor
68.8/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.5/100
PM1 (ultrafine particles):
Good
10.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Good
19.0/100
PM10 (coarse particles):
Good
5.6/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.9/100
PM1 (ultrafine particles):
Fair
23.7/100
Frequently Asked Questions
Is air quality bad in Saijō right now?
On 16 July 2026, overall air quality in Saijō is poor. AQI is the main air quality indicator at 68.8/100. Pollution peaks around 4:00 PM (O3: 68.8/100).
Will air quality be worse tomorrow in Saijō?
On 17 July 2026, air quality conditions in Saijō will be worse than today, with AQI forecast at very poor at 100/100. Pollution peaks around 3:00 PM (O3: 100/100).
When is air pollution at its worst in Saijō?
The biggest local contributors to pollution in Saijō are road traffic as well as manufacturing activity, particularly once windblown dust events occur. 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 Saijō 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