Air quality in Machida, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Machida, 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 Machida is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 13.0 µg/m³, based on six valid observations recorded by OpenAQ.

These values reflect the present conditions without implying any trend or cause. 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

Machida’s OpenAQ feed currently provides data for five measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO2), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO2). The dataset contains six recent rows drawn from two monitoring locations, giving a modest but usable snapshot of the city’s air quality.

All five pollutants have been updated within the last three days, with the most recent timestamp recorded at 2026-02-10 22:00 UTC. PM2.5 is the only pollutant that shows any variation across its two rows: values range from a minimum of 11.0 µg/m³ to a maximum of 13.0 µg/m³, with a median of 12.0 µg/m³ and a 10th‑percentile of 11.2 µg/m³ and a 90th‑percentile of 12.8 µg/m³. In contrast, NO, NO2, NOX and SO2 are constant across their single rows – each reports a value of 0.0 ppm for NO and SO2, and 0.017 ppm for both NO2 and NOX.

The coverage is uneven: PM2.5 data come from the station at 町田市能ケ谷町１５１２, while the nitrogen‑related gases and sulfur dioxide are all sourced from a single site at 町田市金森1-22. Because only two stations contribute, spatial variation within Machida cannot be captured fully; conditions may differ in other neighborhoods or at times beyond the latest update. Nonetheless, the dataset’s freshness and the clear numeric spread for PM2.5 give a reliable recent picture of that pollutant, while the other gases remain static in this limited sample.

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 reflect six valid measurements and were refreshed recently, with the latest update recorded on 2026‑02‑10 at 22:00 UTC; the dataset is considered “Updated within 3 days.” This snapshot provides a brief overview of current conditions, but air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in these figures.

OpenAQ station rows