Worst air pollution Honjō, today and tomorrow
Today (16 July): Air quality in Honjō is poor. AQI and O3 are poor; PM2.5, NO2, SO2, and PM1 are fair; PM10, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 79.1/100).
Tomorrow (17 July 2026): Air quality in Honjō is fair. AQI improves to medium; PM2.5 decreases to good; O3 decreases to medium; SO2 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 58.4/100). 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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Honjō's air quality reflects the flat Saitama northern Arakawa River plain position, with vehicle traffic on surrounding roads and the manufacturing, residential, and agricultural character contributing local sources. The flat Kanto Plain allows reasonable dispersal, while summer photochemical ozone from the broader Kanto corridor and the Karakkaze Foehn winds create distinctive local meteorological dynamics and Honjo generally maintains moderate Japanese inland Kanto plain suburban readings throughout most of the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Poor
79.1/100
PM2.5 (fine particles):
Fair
25.3/100
PM10 (coarse particles):
Good
7.1/100
NO2 (nitrogen dioxide):
Fair
27.3/100
O3 (ozone):
Poor
79.1/100
SO2 (sulfur dioxide):
Fair
21.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.3/100
PM1 (ultrafine particles):
Fair
30.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Medium
58.4/100
PM2.5 (fine particles):
Good
14.6/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Fair
31.9/100
O3 (ozone):
Medium
58.4/100
SO2 (sulfur dioxide):
Good
17.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.8/100
PM1 (ultrafine particles):
Fair
20.3/100
Frequently Asked Questions
Is air quality bad in Honjō right now?
On 16 July 2026, overall air quality in Honjō is poor. AQI is the main air quality indicator at 79.1/100. Pollution peaks around 1:00 PM (O3: 79.1/100).
Will air quality be worse tomorrow in Honjō?
On 17 July 2026, air quality conditions in Honjō will be better than today, with NO2 forecast at fair at 31.9/100. Pollution peaks around 1:00 PM (O3: 58.4/100).
When is air pollution at its worst in Honjō?
Honjō usually sees its poorest air quality when vehicle traffic, heavy industrial and chemical processing, along with light manufacturing coincide with periods when warm, sunny weather takes hold. Photochemical reactions in the heat push ozone levels higher. Readings are generally lower during the cooler, cloudier months.
Are air quality levels in Honjō 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