Air quality in Kawanishi, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Kawanishi, 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 today in Kawanishi is rated as Moderate. The primary pollutant identified is PM2.5 (fine particles).

Measurements show a PM2.5 concentration of 13.0 µg/m³, based on ten valid observations collected via OpenAQ. This reflects the current level of fine particulate matter in the city’s atmosphere. 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

Kawanishi’s open‑air quality feed includes measurements for carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total oxides of nitrogen (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). The dataset contains ten individual rows drawn from two monitoring sites, so each pollutant is represented by either one or both stations.

All six pollutants have a most‑recent reading timestamped 2026-02-10 22:00 UTC, which falls within the “updated within three days” window, indicating that the latest data are fresh. However, the depth of coverage differs: CO and SO₂ each come from a single sensor (CO at 川西市加茂５丁目６３－１, SO₂ at 川西市中央町１２番１号), while NO, NO₂, NOX and PM2.5 are reported by two sensors at the same central address (川西市中央町１２番１号). This uneven station count means that for CO and SO₂ the city picture is based on a single point, whereas the other gases benefit from limited redundancy.

The observed values show very narrow spreads. NO ranges from 0.003 ppm to 0.012 ppm with a median of 0.0075 ppm; NO₂ is essentially constant at 0.017–0.018 ppm (median 0.0175 ppm); NOX varies between 0.02 ppm and 0.03 ppm (median 0.025 ppm). PM2.5 is reported as a single value of 13 µg/m³ across all rows, and SO₂ registers at 0 ppm throughout. CO is also fixed at 0.3 ppm. Because many pollutants have only one recorded figure or come from a lone sensor, the dataset captures only a snapshot rather than the full spatial variability that can occur across Kawanishi.

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 ten valid measurements and were updated within three 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 Kawanishi.

OpenAQ station rows