Worst air pollution Kōchi, today and tomorrow
Today (16 July): Air quality in Kōchi is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 58.0/100).
Tomorrow (17 July 2026): Air quality in Kōchi is poor. AQI worsens to poor; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 68.2/100). 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.
Kōchi's air quality benefits from its exceptional Tosa Bay and Pacific Ocean coastal position in Shikoku, with consistent Pacific maritime breezes providing reliable ventilation. Vehicle traffic on surrounding roads and the bonito, sake, and services corridor contribute modest local sources, while the outstanding Pacific coastal exposure and the Shikoku Mountains rising inland create topographic variation and Kochi generally maintains good to moderate conditions for a major Japanese Pacific coastal city throughout most of the year.
Today - 16 July | Pollution peaks at 17:00
AQI:
Medium
58.0/100
PM2.5 (fine particles):
Good
11.9/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
21.0/100
O3 (ozone):
Medium
58.0/100
SO2 (sulfur dioxide):
Good
5.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
18.5/100
PM1 (ultrafine particles):
Good
16.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Poor
68.2/100
PM2.5 (fine particles):
Good
14.0/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Fair
20.6/100
O3 (ozone):
Poor
68.2/100
SO2 (sulfur dioxide):
Good
7.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
17.9/100
PM1 (ultrafine particles):
Good
18.9/100
Frequently Asked Questions
Is air quality bad in Kōchi right now?
On 16 July 2026, overall air quality in Kōchi is fair. NO2 is the main pollutant at 21.0/100. Pollution peaks around 5:00 PM (O3: 58.0/100).
Will air quality be worse tomorrow in Kōchi?
On 17 July 2026, air quality conditions in Kōchi will be worse than today, with AQI forecast at poor at 68.2/100. Pollution peaks around 1:00 PM (O3: 68.2/100).
When is air pollution at its worst in Kōchi?
In Kōchi, vehicle traffic is the main local source, with conditions worsening when onshore breezes fall calm. Onshore breezes usually help clear the air, but pollution can build up when winds are light. This natural ventilation is one reason coastal areas often see better readings than inland cities.
Are air quality levels in Kōchi 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