Worst air pollution Honmachi, today and tomorrow
Today (16 July): Air quality in Honmachi is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 38.2/100).
Tomorrow (17 July 2026): Air quality in Honmachi is fair. NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 36.8/100). 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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Honmachi in Kumamoto reflects the Kumamoto metropolitan area's central urban corridor adjacent to Kumamoto Castle, with vehicle traffic on surrounding roads and the commercial, government, and tourism character contributing local sources. Consistent Ariake Sea maritime breezes provide background ventilation, while summer photochemical ozone and the broader Kumamoto metropolitan regional background maintain moderate Kumamoto central metropolitan readings throughout most of the year.
Today - 16 July | Pollution peaks at 17:00
AQI:
Fair
38.2/100
PM2.5 (fine particles):
Good
9.3/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Good
15.8/100
O3 (ozone):
Fair
38.2/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
7.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 12:00
AQI:
Fair
36.8/100
PM2.5 (fine particles):
Good
13.8/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Fair
29.3/100
O3 (ozone):
Fair
36.8/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.6/100
PM1 (ultrafine particles):
Good
13.8/100
Frequently Asked Questions
Is air quality bad in Honmachi right now?
On 16 July 2026, overall air quality in Honmachi is fair. AQI is the main air quality indicator at 38.2/100. Pollution peaks around 5:00 PM (O3: 38.2/100).
Will air quality be worse tomorrow in Honmachi?
On 17 July 2026, air quality conditions in Honmachi will be similar to today, with AQI forecast at fair at 36.8/100. Pollution peaks around 12:00 PM (O3: 36.8/100).
When is air pollution at its worst in Honmachi?
Honmachi usually sees its poorest air quality when traffic on the surrounding roads, heavy industrial and chemical processing, together with tourism-related traffic coincide with periods when summer heat and strong sunlight build up. Strong sunlight reacting with local emissions drives up ground-level ozone. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Honmachi 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