Air quality in Ulleung-gun, South Korea today

Mr. Duck’s Air Quality Score

Good air today for Ulleung-gun, 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 Ulleung‑gun is currently classified as Good. The main pollutant identified is PM2.5, fine particulate matter, and the latest measurements show a PM2.5 concentration of 7.0 µg/m³ alongside a PM10 level of 12.0 µg/m³ based on six valid observations.

Data are 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 Ulleung‑gun contains measurements from six individual monitoring entries, each reporting the same set of six pollutants: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), particulate matter 10 µm or less (PM10), particulate matter 2.5 µm or less (PM2.5) and sulfur dioxide (SO2). All values come from a single location identified as 울릉읍, so the spatial coverage is limited to one monitoring point within the county.

Every pollutant record was last refreshed on 2026‑02‑10 at 17:00 UTC, which falls into the “updated within 7 days” freshness category. Because each of the six rows shares this timestamp, the overall data are uniformly recent, with no older or unknown timestamps present.

The reported numbers show no variation across the six entries: CO is consistently 0.43 ppm, NO2 stays at 0.0113 ppm, O3 at 0.0396 ppm, PM10 at 12.0 µg/m³, PM2.5 at 7.0 µg/m³ and SO2 at 0.002 ppm. Consequently the minimum, median, maximum, as well as the 10th‑percentile and 90th‑percentile values are identical for each pollutant, indicating a single observed value rather than a range of measurements.

Because the data originate from only one monitoring site, they capture conditions at that specific spot but do not reflect possible variations across other parts of Ulleung‑gun. The uniform freshness and lack of spread in the numbers mean the dataset provides a snapshot of current air quality at 울릉읍 rather than a broader or time‑varying picture for the whole county.

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 Ulleung‑gun is based on six valid measurements and was refreshed within the past three days, with the latest update recorded at 2026‑02‑10T17:00:00+00:00. This snapshot reflects conditions captured at that time; however, 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