Air quality in Heuksan, South Korea today

Mr. Duck’s Air Quality Score

Moderate air today for Heuksan, 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 Heuksan is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 30.0 and a PM10 reference value of 41.0, 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 Heuksan air‑quality record 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 data come from a single monitoring location, identified as 가거도, so the city’s profile is based on one station’s row for each pollutant.

Each pollutant has only one reported value because the minimum, median and maximum are identical across the dataset. CO registers at 0.33 ppm, NO₂ at 0.0048 ppm, O₃ at 0.0466 ppm, PM₁₀ at 41.0 µg/m³, PM₂.₅ at 30.0 µg/m³ and SO₂ at 0.0016 ppm. Because there is no spread in the numbers, the dataset does not reveal any variation over time or between sites within Heuksan.

The timestamps for all six measurements are the same: 2026‑02‑10 18:00 UTC, which falls within the last seven days. This means every pollutant currently listed is “updated within 7 days,” and there are no older or unknown‑age entries in the record. Consequently, while the data are fresh, they represent a single point in time from one location rather than a broader spatial or temporal picture of air quality across Heuksan. Users should keep in mind that conditions can differ elsewhere on the island or at other times, and additional monitoring stations would be needed to capture such variability.

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 Heuksan reflects six valid measurements and is updated within three days, with the most recent reading recorded at 2026‑02‑10T18:00:00+00:00. These values represent a snapshot of current conditions; air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in this summary.

OpenAQ station rows