Air quality in Kirishima, Japan today

Mr. Duck’s Air Quality Score

Good air today for Kirishima, 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 Kirishima is currently classified as Good. The main pollutant identified is PM2.5, with a measured concentration of 3.0 µg/m³ based on five valid observations reported through OpenAQ.

Overall conditions meet the criteria for a Good rating, and the available data show that fine particulate levels are at the reference value of 3.0 µg/m³. 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 Kirishima air‑quality dataset contains observations for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). All of these are reported from a single monitoring location at 霧島市国分中央五丁目842番地1, so the station count for each pollutant is one row. The most recent measurements were all recorded on 2026‑02‑10 at 22:00 UTC, which falls within the “updated within three days” freshness window, indicating that the data are currently very recent.

Across the five pollutants the reported values show virtually no variability because each metric has a single recorded figure. NO is measured at 0.0 ppm, while both NO₂ and NOX register 0.003 ppm. SO₂ appears at 0.001 ppm. The particulate matter concentration is 3.0 µg/m³ for PM2.5. Because there is only one observation per pollutant, the minimum, median, maximum, 10th percentile and 90th percentile are all identical to the single value reported.

The dataset therefore provides a snapshot rather than a range of conditions; there is no spread or trend information available from these rows. While the timestamp shows that the data are fresh, the limited spatial coverage—just one monitoring site—means that air‑quality conditions elsewhere in Kirishima could differ. Users should keep in mind that this single‑point measurement reflects only the environment at the listed address at the recorded 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 are based on five valid measurements and have been updated within 3 days, with the most recent reading recorded at 2026‑02‑10T22:00:00+00:00. This snapshot reflects conditions at specific monitoring points and times; air quality can differ across neighborhoods and throughout the day in Kirishima.

OpenAQ station rows