Air quality in Yongin-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy air today for Yongin-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 in Yongin‑si is currently classified as Unhealthy. The primary pollutant identified is PM2.5, with a measured concentration of 56.0 µg/m³, while the accompanying PM10 level stands at 61.0 µg/m³ based on 42 valid observations.

Data are shown via OpenAQ and reflect the latest available readings for 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 air‑quality feed for Yongin‑si includes six measured 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). Data come from nine monitoring stations, of which seven have reported values within the last seven days; the most recent update for each pollutant was recorded on 2026‑02‑10 at 18:00 UTC in the 모현읍 area.

Across the city the observed concentrations span a fairly wide range. CO levels vary from a low of 0.40 ppm to a high of 0.68 ppm, with a median around 0.57 ppm; NO₂ ranges between 0.0096 ppm and 0.0342 ppm (median 0.0223 ppm); O₃ is measured from 0.0007 ppm up to 0.0237 ppm (median 0.0033 ppm). Particulate matter shows the greatest absolute spread: PM10 values sit between 24 µg/m³ and 61 µg/m³, with a median of 59 µg/m³, while PM2.5 ranges from 20 µg/m³ to 56 µg/m³ (median 43 µg/m³). SO₂ is the lowest‑level gas, recorded between 0.0011 ppm and 0.0024 ppm with a median of 0.0014 ppm.

The dataset is relatively fresh for most pollutants, as every parameter has at least one reading from the same recent timestamp (2026‑02‑10 18:00 UTC). However, only seven of the nine stations have contributed data within the past week, meaning that a small portion of the city’s monitoring network is currently silent. Consequently, while the available numbers give a snapshot of conditions at 모현읍, they may not capture spatial variations elsewhere in Yongin‑si, and occasional gaps in station reporting could affect the completeness of the picture.

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 set for Yongin‑si includes 42 valid measurements and is marked as Updated within 3 days; the latest values were recorded at 2026‑02‑10T18:00:00+00:00. While these figures reflect recent monitoring across the city, air quality can differ by specific neighbourhoods and times of day, so conditions you experience locally may not match this snapshot exactly.

OpenAQ station rows