Air quality in Icheon-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy air today for Icheon-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 Icheon‑si is currently classified as Unhealthy. The main pollutant identified is PM2.5, with a measured concentration of 59.0 µg/m³, while PM10 stands at 71.0 µg/m³ based on 24 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

Icheon‑si’s OpenAQ feed contains six measured pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM10), particulate matter ≤ 2.5 µm (PM2.5) and sulfur dioxide (SO₂). The data set comprises 30 individual rows drawn from four monitoring stations, giving a modest spatial coverage across the city.

All pollutant readings were last refreshed on 2026‑02‑10 at 17:00 UTC, which falls within the “updated within 7 days” freshness bucket, so the information is currently recent. CO values range from 0.21 to 0.50 ppm with a median of 0.43 ppm; NO₂ spans 0.0043‑0.0343 ppm (median 0.0205 ppm); O₃ varies between 0.0035‑0.0205 ppm (median 0.0088 ppm). For the particulates, PM10 shows a minimum of 2 µg/m³ and a maximum of 71 µg/m³, with a median of 61 µg/m³, while PM2.5 ranges from 46 µg/m³ up to an extreme outlier of 9 999 µg/m³, the typical value being 51 µg/m³. SO₂ is measured between 0.001 and 0.0029 ppm, median 0.0026 ppm.

The distribution indicates that most pollutants have relatively tight central tendencies (the 10th‑90th percentile bands are narrow for gases), whereas the particulate measurements display a broader spread, especially PM2.5 where the upper tail reaches very high values. Because only four stations contribute data, conditions can differ across neighborhoods and times not captured by this limited network. Nonetheless, the dataset provides a current snapshot of Icheon‑si’s air quality across all six key pollutants.

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 Icheon‑si is based on 24 valid measurements and was refreshed Updated within 3 days; the latest values were recorded at 2026‑02‑10T17:00:00+00:00. This snapshot reflects conditions at a specific time and place, but air quality can vary across different neighborhoods and moments throughout the city.

OpenAQ station rows