Air quality in Incheon, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy air today for Incheon, 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 Incheon is currently classified as Unhealthy. The primary pollutant identified is PM2.5, with a measured concentration of 57.0 µg/m³. Additional monitoring shows PM10 levels at 80.0 µg/m³, based on 227 valid observations.

Data is shown via OpenAQ and reflects the latest available measurements 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

The dataset for Incheon contains measurements from 38 monitoring stations and covers six common air‑quality pollutants: carbon monoxide (CO), nitrogen dioxide (NO₂, written as NO2), ozone (O₃, written as O3), particulate matter 10 µm or smaller (PM10), particulate matter 2.5 µm or smaller (PM2.5, written as PM25) and sulfur dioxide (SO₂). All of the latest readings were recorded at 2026‑02‑10 18:00 UTC, which falls within the “updated within 7 days” freshness category, so the information reflects conditions from only a few days ago.

Across the stations the observed values show a fairly wide spread. For gases, CO ranges from a low of 0.3 ppm to a high reported as 9 999 ppm (the upper bound is a placeholder for missing data), with a median of 0.575 ppm and most values falling between the 10th‑percentile of 0.386 ppm and the 90th‑percentile of 0.887 ppm. NO₂ shows a similar pattern, with a minimum of 0.0043 ppm, median 0.0383 ppm and typical values between 0.0086 ppm and 0.0467 ppm. O₃ is generally low, ranging from 0.0012 ppm to the same placeholder maximum, median 0.00415 ppm and a central band of 0.00187‑0.0358 ppm.

Particulate matter concentrations are reported in micrograms per cubic metre. PM10 values span from 11 µg/m³ up to the placeholder maximum, with a median of 52.5 µg/m³; ten percent of stations record less than 25 µg/m³ while ninety percent stay below 73 µg/m³. PM2.5 shows a minimum of 11 µg/m³, median 37 µg/m³ and typical values between 17.9 µg/m³ and 54.2 µg/m³. SO₂ concentrations are low, ranging from 0.0011 ppm to the placeholder maximum, median 0.00295 ppm and a central range of 0.00228‑0.004 ppm.

Overall the data set provides recent, city‑wide coverage for all six pollutants, but the presence of extreme placeholder values (9 999) indicates that some outlier readings are missing or not reported, so the true upper bounds of concentrations are not captured in this snapshot.

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 dataset for Incheon includes 227 valid measurements and is refreshed regularly, with the latest update recorded on 2026‑02‑10T18:00:00+00:00 and labeled as Updated within 3 days. While this provides a reliable snapshot of current conditions, air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows