Air quality in Ōme
Live air-quality readings for Ōme are temporarily unavailable. The hourly forecast below will refresh as soon as the measurement network reports again.
Ōme Air Pollution – Real‑time AQI
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About This Air Quality Data
Data Source
Real-time air quality measurements are provided by OpenWeatherMap's Air Pollution API, which aggregates data from multiple ground-based monitoring stations worldwide. The data is updated hourly to ensure accuracy and timeliness.
AQI Calculation Method
The Air Quality Index (AQI) is calculated using the United States Environmental Protection Agency (US EPA) standard methodology. This involves:
- Converting raw pollutant concentrations (PM2.5, PM10, NO₂, SO₂, CO) to individual AQI values
- Using EPA-defined breakpoint tables for each pollutant type
- Taking the maximum individual AQI as the overall AQI (dominant pollutant approach)
- Applying unit conversions: CO (ppm), NO₂ and SO₂ (ppb) from µg/m³
Note: AQI values are indicative and should be used for general awareness. Sensitive groups (children, elderly, those with respiratory conditions) should take extra precautions when AQI exceeds 100.
How the air quality index is scored
| Index | Level | What it means |
|---|---|---|
| 0–50 | Good | Air quality is satisfactory and poses little or no risk. Normal outdoor activity is fine for everyone. |
| 51–100 | Moderate | Air quality is acceptable. People unusually sensitive to air pollution may want to limit prolonged exertion outdoors. |
| 101–150 | Unhealthy for sensitive groups | Children, older adults and people with asthma or heart disease should reduce prolonged or heavy exertion outdoors. |
| 151–200 | Unhealthy | Everyone may begin to feel effects. Reduce prolonged exertion outdoors; sensitive groups should stay indoors where possible. |
| 201–300 | Very unhealthy | Health alert. Avoid outdoor exertion and keep windows closed. Sensitive groups should remain indoors. |
| 301–500 | Hazardous | Emergency conditions. Everyone should avoid all outdoor activity and stay indoors with filtered air. |
How this figure is produced
These values come from the Copernicus atmospheric model as distributed by OpenWeather, sampled at the coordinates of Ōme. They are modelled concentrations on a grid, not readings from a monitoring station inside the town, so neighbouring localities in the same grid cell will show similar figures. Treat them as a regional indication rather than a measurement taken at your street.