Air quality in Chitose, Japan today
Mr. Duck’s Air Quality Score
Good air today for Chitose, 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 Chitose is currently classified as Good. The main pollutant identified is PM2.5, with a measured concentration of 9.0 µg/m³ based on five valid observations reported through OpenAQ.
Overall conditions meet the criteria for a Good rating, and no other pollutants are highlighted in the available data. 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 Chitose contains five recent observations, each representing a separate measurement row from the same monitoring site at 千歳市富丘４－１３. All five pollutants—nitric oxide (NO), nitrogen dioxide (NO2), total oxides of nitrogen (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO2)—are reported, giving a full picture of the key gases and particles tracked by OpenAQ in this city.
Each pollutant’s most recent reading was recorded on 2026-02-10 at 22:00 UTC, which falls within the “updated within 3 days” freshness window. The values are identical across the minimum, median and maximum statistics, indicating that only a single measurement is available for each parameter at this time. NO registers 0.002 ppm, NO2 0.016 ppm, NOX 0.018 ppm, PM2.5 9.0 µg/m³ and SO2 0.001 ppm; the spread between the 10th and 90th percentiles is zero for every pollutant, so no variability can be observed from this snapshot.
Because the data come from just one location, spatial coverage across Chitose is limited, and the lack of multiple rows means trends or differences between neighborhoods cannot be assessed. Nevertheless, the timestamps show that the information is current, and the uniformity of the values suggests a stable reading at the moment of collection rather than fluctuating conditions. Users should keep in mind that air quality can change throughout the day and across different parts of the city, so this single‑point snapshot represents only one moment in time.
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 Chitose is based on five valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T22:00:00+00:00 (updated within 3 days). These values represent a snapshot of conditions at the time of collection; air quality can differ across neighborhoods and change throughout the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 千歳市富丘４－１３ | no | 0.002 | ppm | 2026-02-10 22:00 UTC |
| 千歳市富丘４－１３ | no2 | 0.016 | ppm | 2026-02-10 22:00 UTC |
| 千歳市富丘４－１３ | nox | 0.018 | ppm | 2026-02-10 22:00 UTC |
| 千歳市富丘４－１３ | pm25 | 9.0 | µg/m³ | 2026-02-10 22:00 UTC |
| 千歳市富丘４－１３ | so2 | 0.001 | ppm | 2026-02-10 22:00 UTC |