Air quality in Koka, Japan today
Mr. Duck’s Air Quality Score
Moderate air today for Koka, 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 Koka today falls into the Moderate category according to the latest assessment. The primary pollutant identified is PM2.5, with a measured concentration of 15.0 µg/m³. Data are based on four valid measurements and are presented via OpenAQ.
Overall conditions reflect the reported values without additional interpretation. 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 Koka includes four measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). All of these come from a single monitoring site located at 甲賀市水口町水口６２００, so the city’s air‑quality picture is based on one set of readings rather than a network of stations.
Each pollutant shows an identical timestamp for its most recent observation: 2026-02-10 22:00 UTC. That date falls within the “updated within three days” window, meaning the latest values are only a few days old at the time of writing (2026‑02‑13). Because there is just one row per pollutant, the reported statistics are limited to that single measurement. For NO the value is 0.001 ppm; for NO₂ it is 0.011 ppm; for NOX it is 0.012 ppm; and for PM2.5 the concentration is 15.0 µg/m³. In every case the minimum, median and maximum are identical, indicating no observed variation across a longer period or across multiple locations.
The data therefore provide a very narrow snapshot: coverage is limited to one location, freshness is recent but only reflects conditions on a single day, and there is no spread of values to illustrate variability. While this gives an up‑to‑date point of reference for each pollutant in Koka, it also means that citywide conditions could differ elsewhere or change from day to day, and additional monitoring sites would be needed to capture a fuller picture.
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 Koka reflects four valid measurements and was updated within 3 days, with the latest reading recorded at 2026‑02‑10T22:00:00+00:00. This snapshot provides a current view of city‑wide air quality, but conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured in these figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 甲賀市水口町水口６２００ | no | 0.001 | ppm | 2026-02-10 22:00 UTC |
| 甲賀市水口町水口６２００ | no2 | 0.011 | ppm | 2026-02-10 22:00 UTC |
| 甲賀市水口町水口６２００ | nox | 0.012 | ppm | 2026-02-10 22:00 UTC |
| 甲賀市水口町水口６２００ | pm25 | 15.0 | µg/m³ | 2026-02-10 22:00 UTC |