Worst air pollution Ayase, today and tomorrow
Today (16 July): Air quality in Ayase is fair. PM2.5, NO2, and PM1 are fair; AQI and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 52.8/100).
Tomorrow (17 July 2026): Air quality in Ayase is fair. AQI worsens to fair; O3 decreases to good; SO2 increases to fair; all other pollutants stay as today. Pollution peaks around 5:00 AM (NO2: 34.3/100). 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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Ayase's air quality reflects the Kanagawa Prefecture flat Sagami River plain position adjacent to the JGSDF Sagami General Depot, with vehicle traffic on surrounding roads and the military logistics and manufacturing character contributing elevated NOₓ alongside primary vehicle sources. The flat Kanto Plain allows reasonable dispersal, while the broader Tokyo-Yokohama metropolitan regional emissions elevate background and Ayase generally maintains moderate Kanagawa suburban corridor readings throughout most of the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Medium
52.8/100
PM2.5 (fine particles):
Fair
24.5/100
PM10 (coarse particles):
Good
7.0/100
NO2 (nitrogen dioxide):
Fair
30.7/100
O3 (ozone):
Medium
52.8/100
SO2 (sulfur dioxide):
Good
18.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.5/100
PM1 (ultrafine particles):
Fair
30.0/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 05:00
AQI:
Fair
34.3/100
PM2.5 (fine particles):
Fair
25.0/100
PM10 (coarse particles):
Good
6.9/100
NO2 (nitrogen dioxide):
Fair
34.3/100
O3 (ozone):
Good
15.4/100
SO2 (sulfur dioxide):
Fair
29.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.4/100
PM1 (ultrafine particles):
Fair
31.5/100
Frequently Asked Questions
Is air quality bad in Ayase right now?
On 16 July 2026, overall air quality in Ayase is fair. NO2 is the main pollutant at 30.7/100. Pollution peaks around 1:00 PM (O3: 52.8/100).
Will air quality be worse tomorrow in Ayase?
On 17 July 2026, air quality conditions in Ayase will be similar to today, with AQI forecast at fair at 34.3/100. Pollution peaks around 5:00 AM (NO2: 34.3/100).
When is air pollution at its worst in Ayase?
Ayase usually sees its poorest air quality when traffic emissions, aircraft operations at the local air base, along with manufacturing activity coincide with periods when winds are light and dispersion is poor. Local weather patterns add further variation on top of these sources. Background emissions and local weather both play a role in day-to-day changes.
Are air quality levels in Ayase 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