Air quality in Buan-gun, South Korea today
Mr. Duck’s Air Quality Score
Moderate air today for Buan-gun, South Korea
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Buan‑gun is currently classified as Moderate. The primary pollutant identified is PM2.5, fine particulate matter that is measured at a reference value of 29.0 µg/m³. In addition, the PM10 concentration has a reference value of 28.0 µg/m³ based on six valid measurements collected through OpenAQ.
These values reflect the present conditions 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
Buan‑gun’s open‑air quality feed currently draws from six monitoring points, each reporting a full set of six key pollutants: carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM₁₀), fine particulate matter 2.5 µm or less (PM₂.₅) and sulfur dioxide (SO₂). All of the latest observations were recorded at the same moment – 2026‑02‑10 18:00 UTC – and are flagged as having been updated within the past seven days, so the data represent a very recent snapshot for every measured compound.
The values themselves show virtually no variation across the six sites. For CO the only reported figure is 0.3 ppm; NO₂ sits at 0.0099 ppm; O₃ registers 0.0121 ppm; SO₂ is measured at 0.0014 ppm. Particulate concentrations are likewise uniform, with PM₁₀ consistently 28.0 µg/m³ and PM₂.5 constantly 29.0 µg/m³. Because each pollutant’s minimum, median, maximum, 10th‑percentile and 90th‑percentile all collapse to the same number, there is no observable spread in the dataset – every station reports identical readings for a given contaminant.
This uniformity means that while Buan‑gun benefits from coverage by six separate sensors, the current record does not reveal spatial differences or temporal trends within the city. The data are fresh, but they represent a single point in time rather than an ongoing series, so conditions may differ at other hours or days and across locations not captured by these six rows.
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 Buan‑gun is based on six valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T18:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of sampling; air quality can vary by location and time within the city, so values may differ from those experienced elsewhere or later in the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| 계화면 | co | 0.3 | ppm | 2026-02-10 18:00 UTC |
| 계화면 | no2 | 0.0099 | ppm | 2026-02-10 18:00 UTC |
| 계화면 | o3 | 0.0121 | ppm | 2026-02-10 18:00 UTC |
| 계화면 | pm10 | 28.0 | µg/m³ | 2026-02-10 18:00 UTC |
| 계화면 | pm25 | 29.0 | µg/m³ | 2026-02-10 18:00 UTC |
| 계화면 | so2 | 0.0014 | ppm | 2026-02-10 18:00 UTC |