Worst air pollution Isehara, today and tomorrow
Today (16 July): Air quality in Isehara is poor. AQI and O3 are poor; PM1 is fair; PM2.5, PM10, NO2, SO2, CO, and HCHO are good. Pollution peaks around 5:00 PM (O3: 66.8/100).
Tomorrow (17 July 2026): Air quality in Isehara is fair. AQI improves to fair; PM2.5 increases to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 10:00 AM (O3: 35.6/100). 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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Isehara's air quality reflects the Kanagawa Prefecture Sagami River valley position at the Tanzawa Mountain base adjacent to Isehara's historic Oyama shrine, with vehicle traffic on surrounding roads and the manufacturing and residential character contributing local sources. The surrounding Tanzawa and Oyama mountain ranges create topographic variation, while Pacific coastal maritime breezes provide background ventilation and Isehara generally maintains moderate to good conditions for a Kanagawa Prefecture mountain valley city throughout most of the year.
Today - 16 July | Pollution peaks at 17:00
AQI:
Poor
66.8/100
PM2.5 (fine particles):
Good
18.0/100
PM10 (coarse particles):
Good
5.4/100
NO2 (nitrogen dioxide):
Good
6.5/100
O3 (ozone):
Poor
66.8/100
SO2 (sulfur dioxide):
Good
4.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Fair
21.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 10:00
AQI:
Fair
35.6/100
PM2.5 (fine particles):
Fair
21.8/100
PM10 (coarse particles):
Good
6.3/100
NO2 (nitrogen dioxide):
Good
8.2/100
O3 (ozone):
Fair
35.6/100
SO2 (sulfur dioxide):
Good
7.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.0/100
PM1 (ultrafine particles):
Fair
26.3/100
Frequently Asked Questions
Is air quality bad in Isehara right now?
On 16 July 2026, overall air quality in Isehara is poor. AQI is the main air quality indicator at 66.8/100. Pollution peaks around 5:00 PM (O3: 66.8/100).
Will air quality be worse tomorrow in Isehara?
On 17 July 2026, air quality conditions in Isehara will be better than today, with AQI forecast at fair at 35.6/100. Pollution peaks around 10:00 AM (O3: 35.6/100).
When is air pollution at its worst in Isehara?
In Isehara, vehicle traffic together with light manufacturing are the main local sources, with conditions worsening when onshore breezes fall calm. Onshore breezes usually help clear the air, but pollution can build up when winds are light. Areas further inland without this ventilation tend to fare worse.
Are air quality levels in Isehara 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