Air quality in Ashiya, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Ashiya, 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 Ashiya is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 19.0 µg/m³ based on ten valid observations reported through OpenAQ.

These values reflect the present assessment for the city and are provided for informational purposes only. 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 Ashiya pulls measurements from two monitoring sites, giving a total of ten recent data rows across the pollutants tracked. All six common air‑quality species are represented: carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). The most recent update for every pollutant comes from the same location – 芦屋市打出町２番１３号 – with timestamps recorded on 2026‑02‑10 at 22:00 UTC, so the freshest values are all less than three days old.

Across the ten rows the observed concentrations show a narrow spread. CO is constant at 0.2 ppm in its single reading, while SO₂ registers zero across its lone entry. The nitrogen oxides vary modestly: NO ranges from 0.001 to 0.004 ppm (median 0.0025 ppm), NO₂ from 0.011 to 0.019 ppm (median 0.015 ppm) and NOX from 0.012 to 0.023 ppm (median 0.0175 ppm). PM2.5 values sit between 17.0 and 19.0 µg/m³, with a median of 18.0 µg/m³. These figures indicate that the dataset captures both low‑end and high‑end observations for each gas, though the number of samples per pollutant is limited to one or two recent points.

Because only two stations contribute data, spatial coverage within Ashiya is modest; conditions can differ in other neighborhoods not directly monitored. Nevertheless, the timestamps confirm that all available measurements are current as of early February 2026, providing a timely snapshot of the city’s air quality at the sampled 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 dataset for Ashiya includes ten valid measurements and is refreshed regularly, having been updated within the past three days (last update: 2026‑02‑10T22:00:00+00:00). These figures represent a snapshot of current conditions; however, air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in this summary.

OpenAQ station rows