Air quality in Iwaki, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Iwaki, 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 Iwaki is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 12.0 µg/m³, based on ten valid observations reported through OpenAQ.

Overall conditions reflect the Moderate category with PM2.5 as the dominant factor and a recorded value of 12.0 µg/m³ from the available data set. 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 Iwaki air‑quality feed draws from two monitoring sites that together contribute ten recent records. All five common pollutants are represented: nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). Each pollutant’s most recent measurement was logged on 2026‑02‑10 at 22:00 UTC, so the dataset reflects conditions from just a few days ago.

Across the ten rows, NO values are very low, ranging from zero to 0.001 ppm with a median of 0.0005 ppm and the 90th percentile at 0.0009 ppm. NO₂ shows a broader spread, recorded between 0.003 ppm and 0.015 ppm; half of the observations sit around 0.009 ppm and the upper decile reaches 0.0138 ppm. NOX follows a similar pattern, varying from 0.003 ppm to 0.016 ppm, median 0.0095 ppm and 90th percentile 0.0147 ppm. PM2.5 concentrations are expressed in micrograms per cubic metre, with the smallest reading at 2 µg/m³, a typical value of 7 µg/m³, and a maximum of 12 µg/m³; the 10th and 90th percentiles sit at 3 µg/m³ and 11 µg/m³ respectively. SO₂ is constant across all rows at 0.001 ppm, showing no observed variation in this snapshot.

The data set therefore offers a concise but current picture of Iwaki’s air quality: two stations provide fresh readings for each pollutant, the temporal coverage is limited to the last few days, and while most gases show modest variability, PM2.5 exhibits a wider range within the same period. Because only ten rows are available, spatial and temporal nuances beyond these points cannot be captured, so conditions may differ in other parts of the city or at times not represented here.

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 Iwaki reflects ten valid measurements and was updated within three days, with the latest refresh recorded at 2026‑02‑10 22:00 UTC. These values provide a recent snapshot of ambient conditions, but air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in this summary.

OpenAQ station rows