Air quality in Kashiwa, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Kashiwa, 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 Kashiwa is currently rated as Moderate. The primary pollutant identified is PM2.5, which represents fine particulate matter measured in the atmosphere.

Measurements from OpenAQ show a PM2.5 concentration of 20.0 µg/m³ based on fifteen valid observations. No PM10 reference value is available for this 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

The Kashiwa data set includes measurements for carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), total nitrogen oxides (NOX), fine particulate matter (PM2.5) and sulfur dioxide (SO₂). Across the three monitoring rows, the number of stations contributing to each pollutant varies: CO is reported from a single location, while NO, NO₂, NOX and PM2.5 each have three reporting stations, and SO₂ has two.

All six pollutants were last updated on 2026-02-10 22:00 UTC, so the freshest readings are just a few days old. The median values show relatively tight spreads for most gases: NO ranges from 0.002 to 0.008 ppm with a median of 0.007 ppm; NO₂ stays between 0.026 and 0.029 ppm (median 0.026 ppm); NOX varies from 0.028 to 0.037 ppm (median 0.033 ppm). PM2.5 is measured at a constant 20.0 µg/m³ across the three stations, with a minimum of 18.0 µg/m³ and no higher values recorded. SO₂ is low, ranging from 0 to 0.001 ppm (median 0.0005 ppm). CO is also stable at 0.4 ppm in its sole reporting location.

The coverage is uneven: three pollutants have full three‑station representation, but CO and SO₂ rely on fewer sites, which means city‑wide conditions for those gases may be less fully captured. Despite the recent timestamps, the limited number of stations—especially for CO—means that spatial variations within Kashiwa could differ from what the current data show.

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 15 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 across Kashiwa, but conditions can differ by specific neighbourhoods and times of day, so local variations may not be captured in these aggregated figures.

OpenAQ station rows