Air quality in Uiwang-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Uiwang-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 Uiwang‑si is classified as USG. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 52.0 µg/m³ and a PM10 level of 53.0 µg/m³, based on twelve valid observations collected via OpenAQ.

These values 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

Uiwang‑si’s open data feed supplies six key air‑quality measurements—carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM10), fine particulate matter 2.5 µm or less (PM2.5) and sulfur dioxide (SO₂). All of these come from three monitoring stations, each providing a recent reading that was last updated on 2026‑02‑10 at 17:00 UTC, so the dataset reflects conditions within the past week for every pollutant.

The recorded values show a fairly wide spread. CO concentrations range from 0.61 ppm to 0.69 ppm with a median of 0.68 ppm; NO₂ varies between 0.023 ppm and 0.0373 ppm, centering around 0.0366 ppm; O₃ is low, spanning 0.0006‑0.0022 ppm with a median of 0.0017 ppm. Particulate matter shows the greatest variability: PM10 values sit between 15 µg/m³ and 53 µg/m³ (median 52 µg/m³), while PM2.5 ranges from 7 µg/m³ to 52 µg/m³ (median 45 µg/m³). SO₂ is measured in a narrow band of 0.0011‑0.0019 ppm, median 0.0018 ppm.

Because each pollutant is reported from the same three stations, coverage is uniform across the city, but the data set contains no older or unknown timestamps—every entry falls into the “updated within 7 days” freshness bucket. The percentile figures illustrate that most observations sit near the upper end of their ranges: the 90th percentile for CO is 0.688 ppm, for NO₂ 0.03716 ppm, for PM10 52.8 µg/m³ and for PM2.5 50.6 µg/m³. This suggests that recent conditions in Uiwang‑si have tended toward the higher side of typical values for these pollutants, though actual levels can still differ across neighborhoods and times of day.

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 Uiwang‑si is based on twelve valid measurements and was refreshed within the past three days, with the most recent update recorded at 2026‑02‑10T17:00:00+00:00. This snapshot reflects conditions at the time of sampling; air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows