Air quality in Kakogawa, Japan today

Mr. Duck’s Air Quality Score

Moderate air today for Kakogawa, 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 Kakogawa is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles).

Measurements show a PM2.5 concentration of 28.0 µg/m³, based on 19 valid observations reported through 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 Kakogawa dataset currently includes 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). Data come from 19 individual rows that represent four monitoring stations spread across the city, so each pollutant is not necessarily captured at every location. The most recent readings for all six species were recorded on 2026-02-10 at 22:00 UTC, which means the information is fresh and falls within a three‑day window.

Across the available rows, CO is reported from a single site in 平岡町新在家 where it consistently reads 0.4 ppm. NO appears at one station in 別府町西町１ with values ranging from zero to 0.015 ppm; its median of 0.0005 ppm and the 90th percentile of about 0.011 ppm indicate that most observations are very low, but occasional spikes reach the upper end of the range. NO₂ and NOX share the same monitoring point, showing minimums of 0.012 ppm (NO₂) and 0.013 ppm (NOX), maximums of 0.021 ppm and 0.036 ppm respectively, and medians around 0.0145 ppm, suggesting a modest but consistent presence of nitrogen oxides. PM2.5 measurements also come from 別府町西町１, with values spanning 13 to 28 µg/m³; the median sits at 21.5 µg/m³ and the 90th percentile reaches 26.2 µg/m³, highlighting a relatively wide spread in particulate concentrations across the sampling period. SO₂ is recorded at the same site as the nitrogen species, ranging from zero to 0.001 ppm with a median of 0.0005 ppm, indicating generally negligible sulfur dioxide levels.

Because only four stations contribute data and some pollutants are captured at just one location, the picture of air quality in Kakogawa is necessarily limited to those specific points and times. Conditions can differ across neighborhoods and may change outside the narrow window represented by the latest timestamps.

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 Kakogawa is based on 19 valid measurements and was refreshed recently, Updated within 3 days (last update: 2026‑02‑10T22:00:00+00:00). This snapshot reflects conditions at the time of collection but air quality can vary across different neighborhoods and times of day within the city, so values may not represent every location or moment.

OpenAQ station rows