Air quality in Arao, Japan today
Mr. Duck’s Air Quality Score
Good air today for Arao, 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 Arao is classified as Good today. The primary pollutant measured is PM2.5, with a reported concentration of 6.0 µg/m³ based on five valid observations from OpenAQ data.
Overall conditions meet the criteria for a Good rating, and no other pollutants are highlighted in this 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 Arao contains a single monitoring location, providing measurements for five pollutants: nitrogen monoxide (NO), nitrogen dioxide (NO2), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO2). All values are drawn from the same row recorded at 荒尾市川登1868-12, with the most recent update timestamped 2026‑02‑10 22:00 UTC for every pollutant.
Across the five species the observed concentrations are very narrow. NO, SO2 and the combined NOX share an identical reading of 0.0 ppm (NO) or 0.0 ppm (SO2) and 0.007 ppm (NOX), with both minimum and maximum equal to the median, indicating no variation in the recent sample. NO2 also shows a single value of 0.007 ppm, again with identical min‑med‑max. PM2.5 is reported as 6.0 µg/m³, likewise without spread. Because each pollutant has only one recorded point, percentile estimates (10th and 90th) match the same figure.
The freshness of the data is uniform: every measurement was last refreshed within three days of the reference date, so the dataset reflects conditions as of early February 2026. However, with only one monitoring station the spatial coverage for Arao is limited; air quality can differ across neighborhoods or at other times of day that are not captured here. Consequently, while the current snapshot shows consistent low‑level readings for all five pollutants, users should be aware that a single location cannot represent citywide variability.
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 reflects five valid measurements and is updated within 3 days, with the latest reading recorded on 2026‑02‑10 at 22:00 UTC. These values provide a recent snapshot of Arao’s air quality but may not represent conditions everywhere in the city or at every moment; local variations can occur due to micro‑climates and short‑term influences.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 荒尾市川登1868-12 | no | 0.0 | ppm | 2026-02-10 22:00 UTC |
| 荒尾市川登1868-12 | no2 | 0.007 | ppm | 2026-02-10 22:00 UTC |
| 荒尾市川登1868-12 | nox | 0.007 | ppm | 2026-02-10 22:00 UTC |
| 荒尾市川登1868-12 | pm25 | 6.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 荒尾市川登1868-12 | so2 | 0.0 | ppm | 2026-02-10 22:00 UTC |