Air quality in Kosa, Japan today

Mr. Duck’s Air Quality Score

Good air today for Kosa, Japan

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Kosa is currently rated as Good. The primary pollutant identified is PM2.5, with a measured concentration of 4.0 µg/m³. Data are shown via OpenAQ and reflect one valid measurement taken for this assessment.

Overall conditions meet the criteria for a Good rating based on 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 current station data listed for this city is focused on particulate matter (PM). Only one monitoring location reports in Kosa, and the sole pollutant available from that row is PM2.5 measured in micrograms per cubic metre. The reading recorded at 2026-02-10 22:00 UTC shows a value of 4.0 µg/m³, which is also the minimum, median and maximum reported for this site, indicating no variation within the limited dataset.

Because there is just a single row, coverage across pollutants is extremely narrow; no other contaminants such as ozone or nitrogen dioxide are represented. The timestamp is recent—updated within three days of the current date—so the data can be considered fresh, but the lack of additional stations means spatial representation for Kosa is minimal. Consequently, while the available figure is precise, it reflects conditions at only one point in the city and may not capture broader local differences that could exist at other times or locations.

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 Kosa reflects a single valid measurement and was updated within 3 days, with the latest reading recorded at 2026‑02‑10T22:00:00+00:00. This snapshot provides a brief view of current conditions 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