Air quality in Kisarazu, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Kisarazu, 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 Kisarazu is currently classified as Moderate. The main pollutant identified is PM2.5, with a reference concentration of 12.0 µg/m³ based on nine valid measurements.

These values reflect the latest data shown via OpenAQ for this location. 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 dataset for Kisarazu contains measurements of five pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX) and fine particulate matter (PM2.5). The information comes from nine individual rows that represent two monitoring stations in the city, with each row providing a recent snapshot of one or more gases. All of the latest recordings were taken on 2026-02-10 at 22:00 UTC, so the data is uniformly fresh across every pollutant.

Across the nine rows the observed values show modest variability. For NO the concentrations range from a minimum of 0 ppm to a maximum of 0.001 ppm, with a median of 0.0005 ppm and the 10th‑percentile at 0.0001 ppm. NO₂ spans 0.008 ppm up to 0.021 ppm (median 0.0145 ppm), while NOX varies between 0.008 ppm and 0.022 ppm (median 0.015 ppm). PM2.5 levels are recorded in micrograms per cubic metre, ranging from 6 µg/m³ to 12 µg/m³ with a median of 9 µg/m³; the 10th‑percentile sits at 6.6 µg/m³ and the 90th‑percentile at 11.4 µg/m³. CO is reported from only one location, consistently at 0.3 ppm for that row.

The coverage is uneven: while NO, NO₂, NOX and PM2.5 each have multiple recent entries from the central station (木更津市中央１－１０－１), carbon monoxide is represented by a single reading from a different site (木更津市牛袋５９１－２). Because the dataset relies on just two stations, conditions can differ across neighborhoods and times not captured here. Nonetheless, the current snapshot provides a clear picture of the recent pollutant levels measured in Kisarazu.

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 nine valid measurements and is updated within 3 days, with the latest refresh recorded at 2026‑02‑10T22:00:00+00:00. These values provide a recent snapshot of ambient conditions in Kisarazu, but air quality can differ across neighborhoods and change throughout the day, so this overview may not represent every location or moment within the city.

OpenAQ station rows