Air quality in Hongcheon-eup, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Hongcheon-eup, 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 Hongcheon‑eup is classified as USG. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 47.0 and a PM10 reference value of 62.0, 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 dataset for Hongcheon‑eup includes six measured pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM10), particulate matter 2.5 µm or less (PM2.5) and sulfur dioxide (SO₂). All of these values come from a single monitoring location, so the station coverage consists of one site that reports each pollutant in its own row.

The most recent observation for every pollutant was recorded on 2026‑02‑10 at 17:00 UTC, which falls within the “updated within 7 days” freshness category. Because each pollutant has only a single reported value, the statistical spread is zero: the minimum, median and maximum are identical for every metric (CO 0.57 ppm, NO₂ 0.0216 ppm, O₃ 0.0089 ppm, PM10 62.0 µg/m³, PM2.5 47.0 µg/m³, SO₂ 0.0016 ppm). This means the dataset does not show variability over time or across multiple sites.

With only one station contributing data, the picture of air quality in Hongcheon‑eup is limited to that specific point and moment. While the timestamps are recent, the lack of additional rows or older records means broader spatial or temporal trends cannot be assessed from this collection alone. Users should keep in mind that conditions elsewhere in the town or at other times may differ from the values shown here.

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 Hongcheon‑eup is based on six valid measurements and was refreshed within the past three days, with the latest update recorded at 2026‑02‑10T17:00:00+00:00. This snapshot reflects conditions at the time of sampling; air quality can change across different neighborhoods and times of day within the city, so values may vary locally.

OpenAQ station rows