Worst air pollution Ōme, today and tomorrow
Today (21 September): Air quality in Ōme is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (NO2: 39.9/100).
Tomorrow (22 September 2026): Air quality in Ōme is moderate. AQI worsens to moderate; PM2.5 increases to fair; PM10 increases to fair; NO2 increases to moderate; SO2 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (NO2: 57.1/100). 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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Ōme's air quality benefits from its exceptional western Tokyo metropolitan Tama River valley position at the Okutama mountain gateway, with consistent mountain valley breezes from the surrounding Okutama and Chichibu highlands providing relatively clean natural ventilation. Vehicle traffic on surrounding roads and the manufacturing and residential character contribute local sources, while the mountain valley position aids natural dispersal and Ome generally maintains among the Tokyo metropolitan area's more moderately ventilated western gateway city environments throughout most of the year.
Today - 21 September | Pollution peaks at 16:00
AQI:
Fair
39.9/100
PM2.5 (fine particles):
Good
13.5/100
PM10 (coarse particles):
Good
9.1/100
NO2 (nitrogen dioxide):
Fair
39.9/100
O3 (ozone):
Good
14.4/100
SO2 (sulfur dioxide):
Good
4.7/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
7.4/100
PM1 (ultrafine particles):
Good
13.3/100
Levels show the poorest local air quality during the day
Tomorrow - 22 September | Pollution peaks at 18:00
AQI:
Moderate
57.1/100
PM2.5 (fine particles):
Fair
37.9/100
PM10 (coarse particles):
Fair
26.2/100
NO2 (nitrogen dioxide):
Moderate
57.1/100
O3 (ozone):
Good
15.7/100
SO2 (sulfur dioxide):
Fair
20.9/100
CO (carbon monoxide):
Good
1.3/100
HCHO (formaldehyde):
Good
9.4/100
PM1 (ultrafine particles):
Fair
36.5/100
Frequently Asked Questions
Is air quality bad in Ōme right now?
On 21 September 2026, overall air quality in Ōme is fair. AQI is the main air quality indicator at 39.9/100. Pollution peaks around 4:00 PM (NO2: 39.9/100).
Will air quality be worse tomorrow in Ōme?
On 22 September 2026, air quality conditions in Ōme will be worse than today, with AQI forecast at moderate at 57.1/100. Pollution peaks around 6:00 PM (NO2: 57.1/100).
When is air pollution at its worst in Ōme?
Ōme usually sees its poorest air quality when traffic on the surrounding roads and light manufacturing coincide with periods when weather conditions turn unfavourable. Local weather patterns add further variation on top of these sources. Local weather patterns add further day-to-day variation.
Are air quality levels in Ōme 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 22 September 2026 at 02:59 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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