Air quality in Gyeongju-si, South Korea today

Mr. Duck’s Air Quality Score

Moderate air today for Gyeongju-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 Gyeongju‑si is currently classified as Moderate. The primary pollutant identified for today is PM2.5 (fine particles).

Measurements show a PM2.5 concentration of 22.0 µg/m³ and a PM10 level of 32.0 µg/m³, based on 24 valid observations collected 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 Gyeongju‑si contains measurements from four monitoring stations, each providing a full set of six common air pollutants: carbon monoxide (CO), nitrogen dioxide (NO₂, written as NO2), ozone (O₃), particulate matter 10 µm or smaller (PM10), particulate matter 2.5 µm or smaller (PM2.5, written as PM25), and sulfur dioxide (SO₂). All 24 rows in the source file are recent, with the latest update recorded at 2026‑02‑10 18:00 UTC for every pollutant, so the information reflects conditions within the past week.

Across the four stations the observed concentrations span modest ranges. CO values range from a low of 0.22 ppm to a high of 0.28 ppm, with a median of 0.26 ppm; NO₂ varies between 0.0044 ppm and 0.0076 ppm (median 0.00715 ppm); O₃ is measured from 0.0385 ppm up to 0.0499 ppm (median 0.03945 ppm). For the particulate fractions, PM10 values lie between 20 µg/m³ and 32 µg/m³ (median 25.5 µg/m³), while PM2.5 ranges from 11 µg/m³ to 22 µg/m³ (median 18.5 µg/m³). SO₂ concentrations are between 0.001 ppm and 0.0034 ppm, with a median of 0.0025 ppm.

The data show a fairly tight distribution for each pollutant: the 10th‑percentile values are close to the minima and the 90th‑percentile values approach the maxima, indicating limited variability among the stations during the reporting period. Because every station reports all six pollutants, coverage is uniform across the city, but the absolute number of monitoring points (four) means that localized differences may not be captured. Users should keep in mind that conditions can still change throughout the day and between neighborhoods, even though the current snapshot is recent and complete for the listed contaminants.

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 are based on 24 valid measurements and have been refreshed — updated within 3 days (last update: 2026‑02‑10T18:00:00+00:00). This snapshot reflects conditions at the time of sampling; air quality can vary by location and time within Gyeongju-si, so values may differ across neighborhoods or later in the day.

OpenAQ station rows