Air quality in Hanno, Japan today
Mr. Duck’s Air Quality Score
Good air today for Hanno, Japan
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Hanno is rated as Good today. The primary pollutant identified is PM2.5, with a measured concentration of 9.0 µg/m³ based on four valid observations reported through OpenAQ.
Overall conditions meet the Good classification, and no other pollutants are highlighted in the current assessment. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.
Latest sensor values
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
What the data includes
The dataset for Hanno contains measurements from a single monitoring site, 飯能市双柳75, and includes four pollutants: nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). Each pollutant is reported in one row, so the station count for every compound is exactly one.
All of the latest observations were recorded at the same moment – 2026‑02‑10 22:00 UTC – and are flagged as having been updated within the past three days. Because there is only one source, the values shown represent both the minimum and maximum recorded levels for each pollutant during the reporting period. NO registers a concentration of 0.001 ppm, NO₂ 0.005 ppm, NOX 0.006 ppm and PM2.5 measures 9.0 µg/m³; the median, 10th percentile and 90th percentile for each are identical to these figures.
With just one monitoring location, the data give a very narrow snapshot of air quality in Hanno. The uniform timestamps indicate that the dataset is current, but the lack of additional stations means spatial variability across the city cannot be captured. Consequently, while the numbers provide an up‑to‑date point reference for the listed pollutants, they do not reflect possible differences that might exist in other neighborhoods or at other times.
Learn more about sources and filtering: About the data.
Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)
Latest sensor values (bars)
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
Data notes
The data shown for Hanno reflects four valid measurements and was updated within 3 days, with the latest refresh recorded at 2026‑02‑10T22:00:00+00:00. These values provide a recent snapshot of citywide air quality but may not capture short‑term fluctuations or differences across neighborhoods; conditions can vary by location and time throughout the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 飯能市双柳75 | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 飯能市双柳75 | no2 | 0.005 | ppm | 2026-02-10 22:00 UTC |
| 飯能市双柳75 | nox | 0.006 | ppm | 2026-02-10 22:00 UTC |
| 飯能市双柳75 | pm25 | 9.0 | µg/m³ | 2026-02-10 22:00 UTC |