Air quality in Ishigaki, Japan today
Mr. Duck’s Air Quality Score
Good air today for Ishigaki, 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 Ishigaki is currently classified as Good. The primary pollutant identified for today is PM2.5 (fine particles).
Measurements show a PM2.5 concentration of 5.0 µg/m³, based on four valid observations recorded by OpenAQ. This indicates that the particulate level is within the reference range used for 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
Ishigaki’s OpenAQ feed contains data for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO2), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulphur dioxide (SO2). All of these come from a single monitoring location identified as 石垣市字真栄里４３８, so the city’s dataset is based on one station row per pollutant.
The most recent measurements for NO, NO2, NOX and PM2.5 were all recorded on 2026-02-10 at 22:00 UTC, indicating that four of the five pollutants have fresh data within the last three days. In contrast, the SO2 reading is older, dated 2025-02-27 at 04:00 UTC, and is flagged as “Old data”. Because only one site supplies the observations, there is no spatial spread across Ishigaki; conditions can differ in other neighborhoods or at different times of day.
Across the four up‑to‑date pollutants the recorded values show virtually no variation. NO registers a constant 0.0 ppm (minimum, median and maximum all zero), while both NO2 and NOX each sit at a steady 0.001 ppm. PM2.5 is likewise uniform at 5.0 µg/m³ for its minimum, median and maximum. The SO2 value also remains at 0.0 ppm throughout the available record. This lack of spread suggests that the single sensor has captured a narrow snapshot rather than a range of conditions, and the dataset does not provide information on day‑to‑day fluctuations or broader citywide patterns.
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 four valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 22:00 UTC; it is therefore considered “Updated within 3 days.” While these figures give a reliable snapshot of Ishigaki’s air quality at that moment, conditions can differ across neighborhoods and change throughout the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 石垣市字真栄里４３８ | no | 0.0 | ppm | 2026-02-10 22:00 UTC |
| 石垣市字真栄里４３８ | no2 | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 石垣市字真栄里４３８ | nox | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 石垣市字真栄里４３８ | pm25 | 5.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 石垣市字真栄里４３８ | so2 | 0.0 | ppm | 2025-02-27 04:00 UTC |