Air quality in Gwacheon-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Gwacheon-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 Gwacheon‑si is classified as USG today. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 42.0 µg/m³ and a PM10 level of 54.0 µg/m³, based on twelve valid observations collected via OpenAQ.

Data are presented without interpretation or recommendation. 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 dataset for Gwacheon‑si contains measurements of six common air 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). These values are drawn from 18 individual data rows collected at two monitoring sites, all of which were last updated on 2026‑02‑10 18:00 UTC, so the information is current within the past week for every pollutant.

Across the records CO levels range from a low of 0.51 ppm to a high of 0.78 ppm, with a median of 0.65 ppm observed at the 별양동 site. NO₂ varies between 0.0224 ppm and 0.0301 ppm, centering around a median of 0.0296 ppm, while O₃ is measured from 0.0048 ppm up to 0.008 ppm with a typical value near 0.0061 ppm. Particulate matter shows broader dispersion: PM₁₀ values fall between 26 µg/m³ and 60 µg/m³, the middle of the distribution being 54 µg/m³; PM₂.₅ spans 13 µg/m³ to 42 µg/m³ with a median of 38 µg/m³. SO₂ is the most tightly clustered, recorded from 0.0013 ppm to 0.0014 ppm and averaging 0.0014 ppm at 별양동.

The data set is relatively compact, with only two stations supplying all six pollutants, but each pollutant has a full complement of recent readings. The spread between minimum and maximum values is modest for gases (CO, NO₂, O₃, SO₂) and wider for particulates, indicating that particulate concentrations can fluctuate more across the city. Because coverage relies on just two locations, conditions may differ in other neighborhoods or at times outside the most recent update.

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 dataset for Gwacheon‑si includes twelve valid measurements and is updated within three days, with the most recent values recorded at 2026‑02‑10T18:00:00+00:00. These figures represent a snapshot of conditions across the monitoring network; actual air quality can differ by specific location and time of day within the city.

OpenAQ station rows