Air quality in Anseong-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Anseong-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 Anseong‑si is classified as USG. The primary pollutant identified is PM2.5, with a measured concentration of 47.0 µg/m³. In addition, the PM10 level recorded is 61.0 µg/m³ based on 18 valid observations.

Data are shown via OpenAQ and reflect the current monitoring results 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 Anseong‑si air quality dataset currently 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). All three monitoring stations in the city provide a full set of these six readings, giving a total of 18 pollutant‑station rows.

The most recent observations for every pollutant were recorded on 2026-02-10 at 18:00 UTC, so the data are all fresh within the last seven days. CO values range from 0.44 to 0.59 ppm with a median of 0.48 ppm; NO₂ spans 0.0135–0.0284 ppm (median 0.0152 ppm); O₃ varies between 0.0121 and 0.0176 ppm (median 0.0167 ppm). For the particulates, PM₁₀ shows a minimum of 51 µg/m³, a maximum of 61 µg/m³ and a median of 57 µg/m³, while PM₂.₅ ranges from 42 to 47 µg/m³ with a median of 46 µg/m³. SO₂ is the lowest‑concentration gas, recorded between 0.0012 and 0.0022 ppm (median 0.0021 ppm).

Because each station reports all six pollutants, there is no gap in pollutant coverage across the city, but the numeric spread differs: the gases (CO, NO₂, O₃, SO₂) show relatively narrow ranges, whereas the particulate matter measurements exhibit a broader span, especially PM₁₀ where values differ by about 10 µg/m³ between the lowest and highest stations. The dataset’s uniform freshness—every pollutant updated on the same recent timestamp—means that current conditions are represented consistently across all measured components for Anseong‑si.

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 Anseong‑si reflects 18 valid measurements and is Updated within 3 days, with the most recent values recorded at 2026‑02‑10T18:00:00+00:00. This snapshot provides a current overview of ambient air quality, but conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured in these aggregate figures.

OpenAQ station rows