Air quality in Yangju, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy air today for Yangju, 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 Yangju is currently classified as Unhealthy. The primary pollutant identified is PM2.5, with a measured concentration of 57.0 µg/m³, while PM10 stands at 89.0 µg/m³ based on twelve valid observations.

Data are shown via OpenAQ and reflect the latest available readings for the city. 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 air‑quality feed for Yangju currently draws from two monitoring sites and includes twelve recent records across the six key pollutants tracked by OpenAQ. All six substances—carbon monoxide (CO), nitrogen dioxide (NO₂, written as NO2), ozone (O₃, written as O3), particulate matter 10 µm or less (PM10), fine particulate matter 2.5 µm or less (PM2.5, written as PM25) and sulfur dioxide (SO₂)—are represented in the dataset. Each pollutant’s most recent measurement was logged on 2026‑02‑10 at 17:00 UTC, so the data are all fresh within the past seven days.

Across the two stations the observed values show modest variability. CO ranges from a low of 0.55 ppm to a high of 0.68 ppm, with a median of about 0.62 ppm; NO₂ spans 0.0212‑0.0312 ppm (median ≈ 0.026 ppm); O₃ is tightly clustered between 0.0029 and 0.0031 ppm (median ≈ 0.003 ppm). Particulate matter shows higher absolute levels: PM10 varies from 78 to 89 µg/m³ with a median of 83.5 µg/m³, while PM2.5 runs from 53 to 57 µg/m³ and centers around 55 µg/m³. SO₂ is the lowest‑concentration gas, recorded between 0.0026 and 0.0031 ppm (median ≈ 0.00285 ppm). The 10th‑percentile values sit close to the minima for each pollutant, while the 90th‑percentile values are near the maxima, indicating that most recent readings fall within a narrow band around the median.

Because only two stations contribute data, spatial coverage is limited; conditions can differ across neighborhoods and times not captured by these points. Nonetheless, the dataset provides a current snapshot of Yangju’s air quality, with all six pollutants reported and every measurement dated within the last week.

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 Yangju includes twelve valid measurements and is marked as Updated within 3 days, with the most recent values recorded on 2026‑02‑10T17:00:00+00:00. These figures represent a snapshot of ambient conditions at the time of collection; actual air quality can differ across neighborhoods and change throughout the day. Use this information as a general reference rather than a precise real‑time reading.

OpenAQ station rows