Air quality in Matsudo, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Matsudo, 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 Matsudo is currently classified as Moderate. The primary pollutant identified is PM2.5, with a measured concentration of 15.0 µg/m³ based on ten valid observations reported through OpenAQ.

These measurements indicate that fine particulate matter is the dominant factor influencing today’s air quality assessment. 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

Matsudo’s open‑air quality feed contains data for six measured pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). The dataset comprises ten recent observations drawn from two monitoring locations, giving a modest but useful snapshot of the city’s ambient air at a single point in time.

All six pollutants have been recorded within the last three days; the most recent timestamp for every parameter is 2026‑02‑10 22:00 UTC. CO and SO₂ each come from a single sensor (CO at 松戸市上本郷２２３４－５, SO₂ at 松戸市根本３８７－５), while NO, NO₂, NOX and PM2.5 are reported by two sensors both located at 松戸市上本郷２２３４－５. This uneven coverage means that particulate matter and nitrogen compounds have a slightly broader spatial representation than the carbon‑based gases.

The observed values show limited variation across the recent period. CO is consistently 0.1 ppm, and SO₂ remains steady at 0.001 ppm. Nitrogen oxide levels range from 0.007 to 0.008 ppm (median 0.0075 ppm), NO₂ spans 0.029–0.033 ppm (median 0.031 ppm) and NOX varies between 0.036 and 0.041 ppm (median 0.0385 ppm). PM2.5 measurements lie between 12.0 and 15.0 µg/m³, with a median of 13.5 µg/m³. The narrow spreads suggest relatively stable conditions during the reporting window, though the limited number of stations means local hotspots could be missed.

Overall, Matsudo’s current dataset offers fresh, point‑in‑time readings for six key pollutants across two sites, providing a concise baseline while highlighting that broader sensor coverage would improve spatial detail.

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 ten valid measurements and is updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. This snapshot provides a current view of air quality in Matsudo, but conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured by these figures.

OpenAQ station rows