Air quality in Kainan, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Kainan, 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 Kainan is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 10.0 µg/m³, based on ten valid observations collected through OpenAQ.

No additional pollutants are highlighted for today’s assessment. 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

Kainan’s OpenAQ feed currently provides data for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total oxides of nitrogen (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). The dataset comprises ten individual measurement rows drawn from two monitoring stations, all located at the same address in 下津町黒田 112番地. Each pollutant has a single recent reading; the most recent timestamp for every parameter is 2026‑02‑10 22:00 UTC, which falls within the “updated within three days” freshness bucket.

The reported concentrations show very narrow numeric spreads. NO registers a constant value of 0.0 ppm across its minimum, median and maximum, indicating no detectable presence at the time of sampling. Both NO₂ and NOX share identical statistics: a low‑level range from 0.014 to 0.018 ppm, with a median of 0.016 ppm and a 10th–90th percentile band of roughly 0.0144–0.0176 ppm. PM2.5 values sit between 9.0 and 10.0 µg/m³, centering on a median of 9.5 µg/m³; the inter‑percentile range is tight at 9.1–9.9 µg/m³. SO₂ is recorded at a single value of 0.001 ppm for its minimum, median and maximum.

Because all ten rows are recent and come from just two stations, the coverage captures only a limited spatial snapshot of Kainan’s air quality. While the data are fresh, the narrow station count means conditions may differ in other neighborhoods or at times outside the sampling window. Users should keep in mind that these figures represent point‑in‑time measurements rather than citywide averages.

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 reflects ten valid measurements and is Updated within 3 days, with the latest reading recorded on 2026‑02‑10 at 22:00 UTC. These values represent a snapshot of ambient conditions across Kainan and are subject to change throughout the day and between neighborhoods. Consequently, actual air quality may differ depending on specific locations and times within the city.

OpenAQ station rows