Air quality in Hongseong-gun, South Korea today

Mr. Duck’s Air Quality Score

Moderate air today for Hongseong-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 today in Hongseong‑gun is classified as Moderate. The primary pollutant identified is PM2.5, with a measured concentration of 29.0 µg/m³. In addition, the level of larger particulate matter (PM10) is recorded at 32.0 µg/m³ based on twelve valid observations.

Data are shown via OpenAQ and reflect the current monitoring results for the area. 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 Hongseong‑gun air quality feed includes six measured pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM10), particulate matter ≤ 2.5 µm (PM2.5) and sulfur dioxide (SO₂). Data come from 12 individual rows collected at two monitoring stations, and every pollutant entry was last updated on 2026‑02‑10 18:00 UTC, which falls within the “updated within 7 days” freshness window.

Across the recent snapshot, CO values range from a low of 0.41 ppm to a high of 0.49 ppm, with a median near 0.45 ppm; NO₂ spans 0.0073‑0.0133 ppm (median ≈ 0.010 ppm); O₃ varies between 0.0152 and 0.0338 ppm (median ≈ 0.0245 ppm). Particulate concentrations are clustered tighter: PM10 runs from 32 to 38 µg/m³ (median = 35 µg/m³) and PM2.5 from 29 to 35 µg/m³ (median = 32 µg/m³). SO₂ is the lowest‑range gas, recorded between 0.0035 and 0.0042 ppm with a median of about 0.00385 ppm.

The dataset shows consistent coverage for all six pollutants, but the number of rows per station is modest, meaning spatial variation within Hongseong‑gun may not be fully captured by these two sites. Nevertheless, the recent timestamps indicate that the information is current, and the observed ranges are relatively narrow, suggesting limited short‑term fluctuation among the recorded values. Users should keep in mind that conditions can differ across neighborhoods and over time beyond what this snapshot reflects.

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 twelve valid measurements and is updated within three days, with the most recent update recorded at 2026‑02‑10T18:00:00+00:00. This snapshot provides a current view of air quality in Hongseong-gun, but conditions can differ across neighborhoods and change throughout the day, so local variations may exist.

OpenAQ station rows