Air quality in Kasama, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Kasama, 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 Kasama today falls into the Moderate category according to OpenAQ data. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 12.0 µg/m³, based on four valid readings.
This assessment reflects 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
The dataset for Kasama includes measurements of four pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). All values come from a single monitoring site located at 笠間市石井７１７, so the city’s air‑quality picture is based on one station that reported four separate rows of data.
The most recent readings were recorded on 2026-02-10 22:00 UTC, which is within three days of today (2026‑02‑13), indicating that the available information is fairly fresh. For each pollutant the observed range is extremely narrow because only one measurement exists: NO was 0.002 ppm, NO₂ 0.011 ppm, NOX 0.013 ppm and PM2.5 12.0 µg/m³. In every case the minimum, median and maximum values are identical, so there is no observed variability across time or between locations within the city.
Because the coverage relies on a single sensor, spatial variation in Kasama’s air quality cannot be captured by this dataset. The timestamps show that all four pollutants were updated at the same moment, and none of the rows fall into older or unknown freshness categories. Consequently, while the data are up‑to‑date, they represent only one point source and may not reflect conditions elsewhere in the city or changes that occur after the last update.
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 dataset for Kasama includes four valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 22:00 UTC; it is therefore considered updated within three days. This snapshot reflects conditions captured at that time, but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 笠間市石井７１７ | no | 0.002 | ppm | 2026-02-10 22:00 UTC |
| 笠間市石井７１７ | no2 | 0.011 | ppm | 2026-02-10 22:00 UTC |
| 笠間市石井７１７ | nox | 0.013 | ppm | 2026-02-10 22:00 UTC |
| 笠間市石井７１７ | pm25 | 12.0 | µg/m³ | 2026-02-10 22:00 UTC |