Air quality in Hwacheon, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Hwacheon, 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 Hwacheon is classified as USG today. The primary pollutant identified is PM2.5, with a measured concentration of 43.0 µg/m³. In addition, the PM10 level is recorded at 65.0 µg/m³ based on twelve valid observations from OpenAQ.

These values reflect the current monitoring results 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

Hwacheon’s OpenAQ feed currently provides data for six key 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). The dataset consists of twelve individual rows drawn from two monitoring stations, all recorded at the same recent timestamp of 2026‑02‑10 18:00 UTC, which meets the “updated within 7 days” freshness criterion for every pollutant.

The observed values show a relatively narrow spread across each metric. CO ranges from 0.29 to 0.30 ppm with a median of 0.295 ppm; NO₂ varies between 0.0095 and 0.0159 ppm, centering around 0.0127 ppm; O₃ is measured from 0.0097 up to 0.049 ppm, with a median near 0.029 ppm. Particulate concentrations are higher: PM₁₀ spans 53 µg/m³ to 65 µg/m³ (median 59 µg/m³) and PM₂.₅ runs from 36 µg/m³ to 43 µg/m³ (median 39.5 µg/m³). SO₂ is the lowest‑level gas, recorded between 0.0016 and 0.0025 ppm with a median of 0.00205 ppm.

Because all twelve rows share the same recent update time, there is no older or unknown data in this snapshot, indicating that the current picture reflects conditions at a single point rather than a continuous trend. The dataset’s breadth across six pollutants and two stations gives a basic but complete chemical profile for Hwacheon at that moment; however, with only two monitoring locations, spatial variation within the city cannot be captured. Users should keep in mind that air quality can differ by neighborhood and over time, so this snapshot represents one specific measurement rather than an exhaustive view of daily conditions.

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 reading recorded at 2026‑02‑10T18:00:00+00:00. While this provides a current snapshot of air quality for Hwacheon, conditions can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows