Air quality in Anan, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Anan, 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 Anan is currently rated as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 17.0 µg/m³ based on five valid observations.
Data are shown via OpenAQ and reflect the latest available readings for this location. 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 Anan includes five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All values come from a single monitoring site located at 阿南市那賀川町黒地７０３－３, so the coverage represents conditions at that specific point rather than city‑wide averages.
The most recent readings were all recorded on 2026-02-10 22:00 UTC, which is within three days of today’s date and therefore considered fresh. For each pollutant the reported range is extremely narrow because the minimum, median and maximum values are identical: NO is consistently 0.001 ppm, NO₂ stays at 0.012 ppm, NOX at 0.013 ppm, PM2.5 at 17.0 µg/m³ and SO₂ registers as 0.0 ppm. This lack of variation suggests that the single‑station data capture a very stable snapshot rather than a broader distribution of values across the city.
Because only one station contributes to the record, there is no spatial spread in the measurements; any changes in air quality at other neighborhoods would not be reflected here. The dataset’s completeness is high for the listed pollutants—each has a recent timestamp—but the limited number of locations means that temporal trends or local differences cannot be assessed from these figures alone.
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 three days, with the most recent reading recorded at 2026‑02‑10T22:00:00+00:00. This snapshot provides a current view of air quality in Anan, but conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured by these figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 阿南市那賀川町黒地７０３－３ | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 阿南市那賀川町黒地７０３－３ | no2 | 0.012 | ppm | 2026-02-10 22:00 UTC |
| 阿南市那賀川町黒地７０３－３ | nox | 0.013 | ppm | 2026-02-10 22:00 UTC |
| 阿南市那賀川町黒地７０３－３ | pm25 | 17.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 阿南市那賀川町黒地７０３－３ | so2 | 0.0 | ppm | 2026-02-10 22:00 UTC |