Air quality in Kimitsu, Japan today

Mr. Duck’s Air Quality Score

Good air today for Kimitsu, 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 Kimitsu is classified as Good today. The primary pollutant identified is PM2.5 (fine particles).

Measurements show a PM2.5 concentration of 9.0 µg/m³, based on nine valid observations recorded by OpenAQ. This indicates that the current particulate level falls within the range associated with the Good category. 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 data set for Kimitsu includes five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO2), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO2). All six rows in the source feed are recent, with the latest update timestamp of 2026‑02‑10 22:00 UTC for every pollutant, so the information reflects conditions from just a few days ago.

Across the two monitoring stations that contribute data, NO is reported as a constant 0.0 ppm at the Kiyosumi‑Kubo location, while both NO2 and NOX show identical ranges from 0.003 to 0.009 ppm, a median of 0.006 ppm and a 10th‑percentile of about 0.0036 ppm. PM2.5 values are also recorded at the Kiyosumi‑Kubo site, varying between 3.0 and 9.0 µg/m³ with a median of 6.0 µg/m³; the spread is modest but indicates occasional higher concentrations up to nine micrograms per cubic metre. SO2 is only available from the Tawarada station, where it remains steady at 0.001 ppm.

The coverage is uneven: three pollutants (NO2, NOX and PM2.5) share the same sensor location, while SO2 comes from a different site and NO has no variation at all. No rows are flagged as old or unknown, meaning the dataset does not contain stale measurements, but the limited number of stations means city‑wide conditions could differ in areas without a monitor. Overall, the data provide a recent snapshot of low‑level concentrations for the listed pollutants, with clear ranges and median values that can be used to understand current air quality at the monitored points.

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 Kimitsu is based on nine valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T22:00:00+00:00 (Updated within 3 days). These values represent a snapshot of conditions across the monitoring network; actual air quality can differ by specific location and time of day within the city.

OpenAQ station rows