Air quality in Kodaira, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Kodaira, 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 Kodaira is assessed as Moderate today. The primary pollutant identified is PM2.5 (fine particles).
Measurements from five valid samples show a PM2.5 concentration of 13.0 µg/m³, which serves as the reference value for this assessment. No PM10 reference value is provided. 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 Kodaira includes five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), combined nitrogen oxides (NOX), fine particulate matter (PM₂.5) and sulfur dioxide (SO₂). All of these values come from a single monitoring location at 小平市小川町２－１３２５, so the city’s air‑quality picture is based on one station rather than a network of sites.
Each pollutant currently has only one recorded value, which also serves as its minimum, median and maximum. NO registers at 0.001 ppm, NO₂ at 0.021 ppm, NOX at 0.022 ppm, PM₂.5 at 13.0 µg/m³ and SO₂ again at 0.001 ppm. Because the same figure appears across the full statistical range, there is no observed spread for any of the five substances in this snapshot.
All measurements were last updated on 2026‑02‑10 22:00 UTC, which falls within three days of today’s date (2026‑02‑13). This indicates that the data are relatively fresh, even though they represent a single point in time rather than an ongoing series. The freshness applies uniformly across each pollutant, so there is no lag or older entry among them.
Overall, the coverage is limited to one sensor row, meaning spatial variation within Kodaira cannot be captured by this dataset. While the timestamps are recent, the lack of multiple stations and the uniformity of values suggest that the current figures give only a narrow snapshot of conditions at a specific location and moment; air quality elsewhere in the city may differ.
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 Kodaira is based on five valid measurements and was updated within three days, with the latest refresh occurring at 2026‑02‑10T22:00:00+00:00. While these readings provide a current snapshot of citywide air quality, conditions can differ across neighborhoods and change throughout the day, so local variations may not be fully captured in this summary.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 小平市小川町２－１３２５ | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 小平市小川町２－１３２５ | no2 | 0.021 | ppm | 2026-02-10 22:00 UTC |
| 小平市小川町２－１３２５ | nox | 0.022 | ppm | 2026-02-10 22:00 UTC |
| 小平市小川町２－１３２５ | pm25 | 13.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 小平市小川町２－１３２５ | so2 | 0.001 | ppm | 2026-02-10 22:00 UTC |