Air quality in Iwakuni, Japan today

Mr. Duck’s Air Quality Score

Good air today for Iwakuni, 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 Iwakuni today is classified as Good. The primary pollutant identified is PM2.5, with a measured concentration of 7.0 µg/m³ based on ten valid observations reported through OpenAQ.

Overall conditions meet the criteria for a Good rating according to the available data. 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

Iwakuni’s OpenAQ feed currently provides data for five pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). The dataset comprises ten individual measurement rows drawn from two monitoring stations, all of which report the same most‑recent timestamp of 2026-02-10 22:00 UTC, meaning the latest values are fresh within the last three days.

Across the ten rows the observed concentrations show a fairly narrow spread. NO ranges from 0.002 to 0.004 ppm with a median of 0.003 ppm; NO₂ varies between 0.010 and 0.013 ppm, centering on 0.0115 ppm; NOX is recorded from 0.012 to 0.017 ppm, with a typical value of 0.0145 ppm. PM2.5 values sit between 5.0 and 7.0 µg/m³, the median being 6.0 µg/m³, while SO₂ is at the detection limit, recorded from 0.000 to 0.001 ppm with a median of 0.0005 ppm. The 10th‑percentile and 90th‑percentile figures for each pollutant confirm that most readings cluster tightly around these central values.

Because only two stations contribute data, the spatial coverage within Iwakuni is limited; conditions can differ in neighborhoods farther from the monitoring sites. Nevertheless, the dataset’s recency and the consistency of timestamps across all five pollutants give a snapshot of current air quality that reflects recent measurements rather than outdated or missing information.

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 most recent reading recorded on 2026‑02‑10 at 22:00 UTC. These values represent a snapshot of Iwakuni’s air quality at that time; conditions can differ across neighborhoods and may change throughout the day. Use this information as a general reference rather than a precise, location‑specific forecast.

OpenAQ station rows