Air quality in Joyo, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Joyo, 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 Joyo is currently classified as Moderate. The primary pollutant identified for today is PM2.5 (fine particles).
Measurements show a PM2.5 concentration of 11.0 µg/m³ based on four valid observations recorded by OpenAQ. 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 Joyo includes measurements of four pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO2), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). All readings come from a single monitoring site located at 城陽市寺田宮ノ平１番地, so the station coverage is limited to one point in the city.
The most recent update for every pollutant was recorded on 2026-02-10 22:00 UTC, and all four rows fall within the last three days, indicating that the data are fresh. For NO the observed values are uniformly 0.0 ppm (minimum, median and maximum are identical). Both NO2 and NOX show a constant concentration of 0.014 ppm across their statistical summaries. PM2.5 is reported at a steady 11.0 µg/m³ with no variation in its minimum, median or maximum. Because each pollutant has only one recorded value set, there is no spread or percentile range to describe.
While the timestamps are recent, the single‑station coverage means the figures represent conditions at that specific address and may not reflect variations elsewhere in Joyo. Users should keep in mind that city‑wide air quality can differ by location and time, even though the current dataset provides up‑to‑date measurements for the listed pollutants at this one 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 data shown for Joyo reflects four valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 22:00 UTC; it is considered “Updated within 3 days.” While this snapshot provides a reliable overview of current conditions, air quality can differ across neighborhoods and change throughout the day, so local variations may exist.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 城陽市寺田宮ノ平１番地 | no | 0.0 | ppm | 2026-02-10 22:00 UTC |
| 城陽市寺田宮ノ平１番地 | no2 | 0.014 | ppm | 2026-02-10 22:00 UTC |
| 城陽市寺田宮ノ平１番地 | nox | 0.014 | ppm | 2026-02-10 22:00 UTC |
| 城陽市寺田宮ノ平１番地 | pm25 | 11.0 | µg/m³ | 2026-02-10 22:00 UTC |