Air quality in Bungo-Ono, Japan today

Mr. Duck’s Air Quality Score

Good air today for Bungo-Ono, 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 Bungo‑Ono is classified as Good today. The primary pollutant identified is PM2.5, with a measured concentration of 6.0 µg/m³ based on five valid observations reported through OpenAQ.

Overall conditions meet the criteria for a Good rating, and the data reflect the current state without additional commentary. 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 Bungo‑Ono includes five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). Each pollutant is represented by a single measurement row, so the city’s air‑quality snapshot comes from one monitoring site located at 豊後大野市三重町市場９３４番地２.

All five rows were last updated on 2026-02-10 22:00 UTC, which falls within the “updated within three days” freshness bucket. Because each pollutant has only one recorded value, the reported minimum, median and maximum are identical: NO is 0.003 ppm, NO₂ is 0.007 ppm, NOX is 0.01 ppm, PM2.5 is 6.0 µg/m³ and SO₂ is 0.001 ppm. This lack of variation means the dataset does not capture any temporal spread or day‑to‑day fluctuations for Bungo‑Ono.

The coverage is therefore quite narrow – five rows from a single location – and while the timestamps are recent, the absence of multiple stations or repeated measurements limits insight into how air quality may differ across neighborhoods or change over time. Users should keep in mind that conditions elsewhere in the city could be different from those recorded at this one site.

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 Bungo‑Ono is based on five valid measurements and was updated within 3 days (last refresh: 2026‑02‑10T22:00:00+00:00). This snapshot reflects conditions at the time of sampling, but air quality can vary across different neighborhoods and times of day within the city.

OpenAQ station rows