Air quality in Kiryu, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Kiryu, 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 Kiryu is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 11.0 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 Kiryu dataset draws from a single monitoring site located at 桐生市仲町２－４－２１ and currently provides readings for five pollutants: nitrogen monoxide (NO), nitrogen dioxide (NO2), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO2). All of the measurements were last refreshed on 2026-02-10 22:00 UTC, which places them within the most recent three‑day window for the city’s air‑quality feed.
Because only one station contributes data, each pollutant is represented by a single value rather than a distribution across multiple locations. For every gas—NO at 0.001 ppm, NO2 at 0.009 ppm, NOX at 0.010 ppm and SO2 at 0.001 ppm—the recorded minimum, median and maximum are identical, indicating no observed variation in the recent reporting period. The particulate matter reading is likewise uniform, with PM2.5 consistently measured at 11.0 µg/m³ across the same timestamp.
These characteristics lead to a few practical observations. First, the dataset offers complete coverage of the listed pollutants but does so from only one point source, so spatial differences within Kiryu are not captured. Second, the freshness of the data is good: every pollutant’s most recent value falls within the last three days, providing a current snapshot rather than historical or stale information. Third, the lack of variability—identical min, median and max values for each parameter—means that short‑term fluctuations cannot be assessed from this set alone. Users should keep in mind that conditions can change across neighborhoods and over time, and the present figures reflect only the specific moment recorded at the single monitoring location.
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 Kiryu reflects five valid measurements and was refreshed within the past three days, with the latest update recorded at 2026‑02‑10 22:00 UTC. These values provide a snapshot of current conditions but air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in this summary.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 桐生市仲町２－４－２１ | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 桐生市仲町２－４－２１ | no2 | 0.009 | ppm | 2026-02-10 22:00 UTC |
| 桐生市仲町２－４－２１ | nox | 0.01 | ppm | 2026-02-10 22:00 UTC |
| 桐生市仲町２－４－２１ | pm25 | 11.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 桐生市仲町２－４－２１ | so2 | 0.001 | ppm | 2026-02-10 22:00 UTC |