Air quality in Kyonan, Japan today

Mr. Duck’s Air Quality Score

Good air today for Kyonan, 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 Kyonan is currently rated as Good. The primary pollutant identified is PM2.5, with a measured concentration of 5.0 µg/m³ based on one valid observation reported through OpenAQ.

No other pollutants are highlighted for today, and the available data reflect a single measurement that supports the Good classification. 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 row is available, reporting PM2.5 at a concentration of 5.0 µg/m³ measured at 安房郡鋸南町下佐久間３４５８, with the most recent timestamp of 2026-02-10 22:00 UTC. This single entry represents the entire dataset for Kyonan, so coverage is limited to a solitary location and does not provide city‑wide spatial detail.

All reported PM2.5 values are identical—the minimum, median, maximum, 10th percentile and 90th percentile all equal 5.0 µg/m³—indicating no observed variation within the available record. The data point falls into the “last three days” freshness bucket, meaning it is relatively recent, but because there are no additional rows or older timestamps, any temporal trends cannot be assessed. Consequently, while the snapshot shows a low and consistent PM2.5 reading at one spot, conditions elsewhere in Kyonan may differ and should be interpreted with caution given the sparse coverage.

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 current reading for Kyonan is based on a single valid measurement and was updated within 3 days, with the most recent data recorded at 2026‑02‑10T22:00:00+00:00. This snapshot reflects conditions at that specific time and location; air quality can vary across different parts of the city and change throughout the day.

OpenAQ station rows