Air quality in Yeoju-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy air today for Yeoju-si, South Korea

⚠️ 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 today in Yeoju‑si is classified as Unhealthy. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 68.0 µg/m³ and a PM10 level of 120.0 µg/m³, based on 18 valid observations collected via OpenAQ.

These values reflect the current state of ambient air in the city. 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 Yeoju‑si dataset currently contains observations from three monitoring stations, each reporting a full set of six common air‑quality pollutants: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), particulate matter 10 µm or smaller (PM10), particulate matter 2.5 µm or smaller (PM2.5) and sulfur dioxide (SO2). All rows are marked as “updated within 7 days,” with the most recent timestamp for every pollutant recorded on 2026‑02‑10 at 17:00 UTC, indicating that the latest available data are less than a week old.

Across the three stations the measured values show modest variability. CO ranges from 0.36 to 0.46 ppm with a median of 0.41 ppm; NO2 spans 0.0135‑0.0282 ppm (median 0.0209 ppm); O3 varies between 0.0056 and 0.0105 ppm (median 0.01 ppm). For the particulate fractions, PM10 values are clustered between 62 and 120 µg/m³ (median 63 µg/m³) while PM2.5 stays in a tighter band of 54‑68 µg/m³ (median 56 µg/m³). SO2 is the least variable, recorded from 0.0024 to 0.0028 ppm with a median of 0.0028 ppm.

The data set therefore offers complete pollutant coverage for each station and recent timestamps, but the number of monitoring points is limited to three locations within Yeoju‑si. This modest spatial coverage means that conditions can differ across neighborhoods, especially for pollutants such as PM10 where the maximum observed value (120 µg/m³) is nearly double the median. Overall, the dataset provides a current snapshot of air quality in Yeoju‑si but users should keep in mind that local variations may not be fully captured by the three reporting sites.

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 for Yeoju‑si is based on 18 valid measurements and has been updated within 3 days, with the most recent reading recorded at 2026‑02‑10T17:00:00+00:00. This snapshot reflects conditions at the time of collection; air quality can vary by location and time within the city, so values may differ across neighborhoods or later in the day.

OpenAQ station rows