Air quality in Katsuura, Japan today

Mr. Duck’s Air Quality Score

Good air today for Katsuura, 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 Katsuura today is classified as Good. The primary pollutant identified is PM2.5, with a measured concentration of 6.0 µg/m³. This assessment is based on a single valid measurement reported through OpenAQ.

Overall conditions are favorable 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

The current station data listed for this city is focused on particulate matter (PM). Only one monitoring location contributes to the dataset, reporting a single pollutant: PM2.5 measured in micrograms per cubic metre. The most recent reading comes from 勝浦市植野７２ and was recorded at 2026-02-10 22:00 UTC, which falls within the last three days, indicating that the available information is relatively fresh.

All reported values for PM2.5 are identical across the statistical summary – a minimum, median, maximum, 10th percentile and 90th percentile all equal 6.0 µg/m³. Because there is just one row of data, there is no variation to describe and no additional pollutants or stations to compare. Consequently, while the snapshot provides an up‑to‑date point measurement for this specific site, it does not capture spatial differences across Katsuura, and conditions elsewhere in the city may differ from what this single reading shows.

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 a single valid measurement and was updated within 3 days, with the latest reading recorded at 2026‑02‑10T22:00:00+00:00. This snapshot provides a brief view of current conditions in Katsuura, but air quality can differ across neighborhoods and change rapidly throughout the day, so local variations may not be captured by this single observation.

OpenAQ station rows