Worst air pollution Matsuyama, today and tomorrow
Today (16 July): Air quality in Matsuyama is poor. AQI and O3 are poor; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 64.3/100).
Tomorrow (17 July 2026): Air quality in Matsuyama is poor. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 69.5/100). 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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Matsuyama's air quality benefits from its exceptional Seto Inland Sea and Iyo Nada coastal position in Ehime Prefecture, with consistent Seto Inland Sea maritime breezes providing reliable ventilation. Vehicle traffic on surrounding roads and the shipbuilding, paper, and services corridor contribute local sources, while the outstanding Seto Inland Sea coastal exposure and the Shikoku Mountains rising inland create topographic variation and Matsuyama generally maintains good to moderate conditions for a major Japanese Shikoku coastal city throughout most of the year.
Today - 16 July | Pollution peaks at 17:00
AQI:
Poor
64.3/100
PM2.5 (fine particles):
Good
10.6/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Good
4.2/100
O3 (ozone):
Poor
64.3/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.0/100
PM1 (ultrafine particles):
Good
11.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Poor
69.5/100
PM2.5 (fine particles):
Good
13.6/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
5.8/100
O3 (ozone):
Poor
69.5/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.2/100
PM1 (ultrafine particles):
Good
17.7/100
Frequently Asked Questions
Is air quality bad in Matsuyama right now?
On 16 July 2026, overall air quality in Matsuyama is poor. AQI is the main air quality indicator at 64.3/100. Pollution peaks around 5:00 PM (O3: 64.3/100).
Will air quality be worse tomorrow in Matsuyama?
On 17 July 2026, air quality conditions in Matsuyama will be similar to today, with AQI forecast at poor at 69.5/100. Pollution peaks around 1:00 PM (O3: 69.5/100).
When is air pollution at its worst in Matsuyama?
In Matsuyama, road traffic along with fishing fleet activity are the main local sources, with conditions worsening when the sea breeze weakens. Sea breezes typically keep conditions in check, except during still weather. This coastal advantage is less pronounced during still, high-pressure weather.
Are air quality levels in Matsuyama 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