Air quality in Adachi, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Adachi, 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 Adachi is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 20.0 µg/m³ based on the latest data set.

Fourteen valid measurements were used to determine this assessment, and the information is shown via OpenAQ. 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 Adachi contains measurements from three monitoring sites, giving a total of fourteen recent records across all pollutants. All five common air‑quality constituents are represented: nitrogen monoxide (NO), nitrogen dioxide (NO₂), combined nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). Each pollutant has its own most recent reading timestamped 2026-02-10 22:00 UTC, so the newest data are all less than three days old.

Across the three stations the observed concentrations show a fairly tight spread. NO varies between 0.001 ppm and 0.007 ppm, with a median of 0.003 ppm; the 10th‑percentile is 0.0014 ppm and the 90th‑percentile reaches 0.0062 ppm. NO₂ values sit from 0.021 ppm up to 0.026 ppm (median 0.024 ppm), while NOX ranges from 0.022 ppm to 0.033 ppm (median 0.027 ppm). PM2.5 measurements are clustered between 18 µg/m³ and 20 µg/m³, the median being 19 µg/m³; the 10th‑percentile is 18.2 µg/m³ and the 90th‑percentile 19.8 µg/m³. SO₂ appears at a single recorded level of 0.001 ppm across all sites, with no variation in the recent data.

The coverage is uneven: while NO, NO₂, NOX and PM2.5 each have three recent records, SO₂ has only two, reflecting fewer updates for that gas. All timestamps are fresh (within three days), but the limited number of stations means the snapshot may not capture micro‑scale differences across the district. Consequently, conditions can differ by location and time even though the current dataset provides a concise, up‑to‑date picture of the main pollutants in Adachi.

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 14 valid measurements and is Updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. While this snapshot provides a current view of air quality across Adachi, conditions can differ by specific neighbourhoods and change throughout the day, so local variations may not be captured in these aggregated figures.

OpenAQ station rows