Air quality in Gyeongsan-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Gyeongsan-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 Gyeongsan‑si is classified as USG. The primary pollutant identified is PM2.5, with a measured concentration of 36.0 µg/m³, while PM10 is recorded at 58.0 µg/m³. Twelve valid measurements were used to determine these values. All concentrations are expressed in micrograms per cubic meter, the standard unit for particulate matter reporting. Both PM2.5 and PM10 figures are presented as reference values for the current assessment. The set of twelve measurements provides a snapshot of ambient conditions for the reporting period. No other pollutants are listed as dominant in the available data.

Data is shown via OpenAQ. 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 Gyeongsan‑si 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). Eighteen rows of observations are drawn from three monitoring stations, and every row falls into the “last 30 days” freshness bucket. The most recent timestamp for each pollutant is 2026‑02‑10 18:00 UTC, so while the data are not from today, they are still within a month of the current date.

Across the pollutants the recorded values show a narrow lower end but a very wide upper bound that reflects placeholder limits rather than typical concentrations. CO values range from a minimum of 0.39 ppm to a maximum of 9 999 ppm, with a median of 0.44 ppm and a 10th percentile of 0.40 ppm; NO2 spans 0.0229‑9 999 ppm, median 0.0265 ppm, 10th percentile 0.0236 ppm; O3 runs from 0.0117‑9 999 ppm, median 0.017 ppm, 10th percentile 0.0128 ppm. For the particulate measures, PM10 varies between 33 µg/m³ and 9 999 µg/m³, median 58 µg/m³, 10th percentile 38 µg/m³; PM2.5 ranges from 33 µg/m³ to 9 999 µg/m³, median 36 µg/m³, 10th percentile 33.6 µg/m³. SO2 is recorded from 0.0026 ppm up to 9 999 ppm, median 0.0031 ppm, 10th percentile 0.0027 ppm. The 90th‑percentile figures for each pollutant sit near the extreme maximum, indicating that most observed values cluster close to the lower end of the range.

Because the data come from only three sites, they provide a snapshot rather than a complete picture of air quality across the whole city. Conditions can differ between neighborhoods and over time, especially given that the newest measurements are more than a week old. Users should keep in mind that the dataset reflects the specific locations and timestamps captured by the OpenAQ sensors.

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 Gyeongsan‑si includes 12 valid measurements and is updated within 30 days. The most recent data were recorded on 2026‑02‑10 at 18:00 UTC. This snapshot reflects conditions at the time of collection, but air quality can vary by location and time within the city. Users should consider these factors when interpreting the information.

OpenAQ station rows