Air quality in Hannan, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Hannan, 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 Hannan is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 18.0 µg/m³ based on four valid observations reported through OpenAQ.
These measurements indicate that the particulate matter level is at the reference value noted for PM2.5, while no PM10 data are available for 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 Hannan contains four pollutant measurements drawn from a single monitoring site located at 阪南市舞４－６－１４. The pollutants recorded are nitrogen monoxide (NO), nitrogen dioxide (NO2), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). Each pollutant appears once, so the overall row count is four while the station count is one.
All readings were last updated on 2026-02-10 22:00 UTC, which falls within the “updated within three days” freshness category, indicating that the most recent data are very current. NO shows a uniform value of 0.0 ppm across its minimum, median and maximum, while both NO2 and NOX have identical readings of 0.017 ppm for every statistical marker (min, median, max, 10th and 90th percentiles). PM2.5 is reported as a single value of 18.0 µg/m³ with no variation in the available statistics.
Because the data come from only one location, spatial coverage across Hannan is limited; conditions elsewhere in the city may differ from those captured at this site. The dataset also lacks any older or unknown‑timestamp entries, so there are no gaps in recency, but the narrow set of rows means there is no observed spread or trend over time for any pollutant. In summary, the available information provides a snapshot of four key air quality metrics at one point in time, all refreshed within the last few days, with each metric showing a single consistent value rather than a range of observations.
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 current dataset for Hannan includes four valid measurements and was updated within 3 days, with the latest refresh recorded at 2026‑02‑10T22:00:00+00:00. These values represent a snapshot of conditions across the city; air quality can differ by specific location and time of day, so individual experiences may vary from the figures shown here.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 阪南市舞４－６－１４ | no | 0.0 | ppm | 2026-02-10 22:00 UTC |
| 阪南市舞４－６－１４ | no2 | 0.017 | ppm | 2026-02-10 22:00 UTC |
| 阪南市舞４－６－１４ | nox | 0.017 | ppm | 2026-02-10 22:00 UTC |
| 阪南市舞４－６－１４ | pm25 | 18.0 | µg/m³ | 2026-02-10 22:00 UTC |