Air quality in Hadong-gun, South Korea today

Mr. Duck’s Air Quality Score

Moderate air today for Hadong-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 Hadong‑gun is currently rated as Moderate. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 12.0 and a PM10 reference value of 17.0, based on eleven valid observations collected via OpenAQ.

These figures reflect the present assessment for the area without implying any trend or cause. 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 Hadong‑gun contains measurements for six common air 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). These values come from two monitoring stations, providing a total of twelve recent records across the pollutants.

All observations were recorded at the same moment, 2026‑02‑10 17:00 UTC, and each entry is flagged as having been updated within the past seven days. This means the data reflects very current conditions for every pollutant measured in the area. The CO values range narrowly from 0.28 to 0.29 ppm with a median of 0.285 ppm, while NO₂ spans 0.0085‑0.0103 ppm (median 0.0094 ppm) and O₃ varies between 0.0154‑0.0214 ppm (median 0.0184 ppm). Particulate matter shows a broader spread: PM10 is recorded from 13 to 17 µg/m³ (median 15 µg/m³), whereas PM2.5 exhibits an extreme range of 12 µg/m³ up to 9 999 µg/m³ with a median of 5 005.5 µg/m³, indicating highly variable fine‑particle concentrations across the limited sampling points. SO₂ is the most stable, recorded between 0.0026 and 0.0028 ppm (median 0.0027 ppm).

Because only two stations contribute data, spatial coverage is modest and the very wide PM2.5 range suggests that conditions can differ markedly within Hadong‑gun. Nevertheless, the uniform timestamp shows that all reported values are contemporaneous, giving a snapshot of air quality at a single point in time rather than a continuous trend.

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 reflects 11 valid measurements and is marked as Updated within 3 days, with the most recent reading recorded at 2026‑02‑10T17:00:00+00:00. While this provides a current snapshot of air quality for Hadong‑gun, conditions can differ across neighborhoods and change throughout the day, so values may not represent every location or moment within the city.

OpenAQ station rows