Air quality in Mihara, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Mihara, 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 Mihara is assessed as Moderate today. The primary pollutant identified is PM2.5, with a measured concentration of 18.0 µg/m³ based on four valid observations from OpenAQ data.
These values reflect the current monitoring snapshot for the city. 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
Mihara’s open‑air quality feed contains data for four key pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO2), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). The dataset is built from a single monitoring location at 三原市宮沖町１１９－２, so each pollutant is represented by one row of measurements. All four rows were last refreshed on 2026‑02‑10 22:00 UTC, which falls within the “updated within three days” freshness window, indicating that the most recent values are current.
The recorded concentrations show no variation across the reporting period: NO consistently reads 0.005 ppm, NO2 stays at 0.013 ppm, NOX is fixed at 0.018 ppm and PM2.5 remains at 18.0 µg/m³. For each pollutant the minimum, median, 10th percentile, 90th percentile and maximum are identical, meaning the dataset captures a single snapshot rather than a range of values over time. Because only one station contributes data, there is no spatial coverage across Mihara; conditions elsewhere in the city may differ from those at the monitoring site.
Overall, the data set offers a very narrow view: four pollutants, each with a solitary recent measurement from one location. While the timestamps are fresh, the lack of multiple rows or historic spread limits insight into temporal trends or geographic variability within the city. Users should keep in mind that air quality can change across neighborhoods and over longer periods, even though the current snapshot is up‑to‑date for this specific site.
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 data for Mihara is based on four valid measurements and was refreshed recently, having been updated within three days (last update: 2026‑02‑10T22:00:00+00:00). This snapshot reflects conditions at the time of sampling; however, air quality can vary across different neighborhoods and times of day within the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 三原市宮沖町１１９－２ | no | 0.005 | ppm | 2026-02-10 22:00 UTC |
| 三原市宮沖町１１９－２ | no2 | 0.013 | ppm | 2026-02-10 22:00 UTC |
| 三原市宮沖町１１９－２ | nox | 0.018 | ppm | 2026-02-10 22:00 UTC |
| 三原市宮沖町１１９－２ | pm25 | 18.0 | µg/m³ | 2026-02-10 22:00 UTC |