Air quality in Hanam-si, South Korea today

Mr. Duck’s Air Quality Score

Moderate air today for Hanam-si, 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 Hanam‑si is rated as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measured concentrations show a PM2.5 reference value of 35.0 µg/m³ and a PM10 reference value of 55.0 µg/m³.

Twelve valid measurements were used to determine the assessment. 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

Hanam‑si’s open‑air quality feed currently 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). The dataset is drawn from 12 recent observation rows collected at two monitoring stations, all of which were last updated on 2026‑02‑10 18:00 UTC, well within the seven‑day freshness window.

The CO values range from a low of 0.62 ppm to a high of 0.75 ppm, with a median of about 0.69 ppm. NO₂ shows a very tight band between 0.0372 and 0.0376 ppm, centering on 0.0374 ppm. O₃ is the most variable of the gases, spanning from 0.0004 to 0.0057 ppm; the median (0.00305 ppm) sits closer to the upper end of that range. Particulate matter concentrations are also clearly bounded: PM10 measurements sit between 55 and 61 µg/m³ (median 58 µg/m³), while PM2.5 ranges from 35 to 44 µg/m³ with a median of roughly 39.5 µg/m³. SO₂ is the least variable, recorded between 0.0019 and 0.002 ppm, median 0.00195 ppm.

Because all rows are recent, the data give a snapshot of current conditions across the two sites, but the limited number of stations means spatial coverage within Hanam‑si is modest. The pollutant set is complete for the six common air‑quality metrics, yet each metric shows a different degree of spread: gases like NO₂ and SO₂ are tightly clustered, whereas O₃ and PM2.5 exhibit broader variation. Users should keep in mind that conditions can differ across neighborhoods and over time, even though the present dataset reflects the latest available readings.

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 Hanam‑si is based on twelve valid measurements and was updated within three days, with the most recent reading recorded at 2026‑02‑10T18:00:00+00:00. This snapshot reflects conditions at the time of collection; air quality can vary across different neighborhoods and times of day within the city, so values may not represent every location or moment.

OpenAQ station rows