Air quality in Chuncheon-si, South Korea today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Chuncheon-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 overall air quality today is classified as USG. The main pollutant is PM2.5 (fine particles). The measured PM2.5 concentration is 46.0 µg/m³ and the PM10 concentration is 56.0 µg/m³. Seventeen individual measurements contributed to the reported values for Chuncheon-si. The latest reading was recorded at 2026-02-23 12:00 UTC. These concentrations are expressed in micrograms per cubic meter and reflect the reference values used in the assessment. All measurements were taken within the same day and meet the validity criteria established for the assessment. The data set includes both fine and coarse particulate matter, providing a comprehensive view of particulate concentrations in the city. The USG category indicates the overall assessment result based on the available measurements.

Data is 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 Chuncheon‑si contains measurements for six common air‑quality 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). In total there are 24 rows of data, which correspond to four monitoring stations each reporting the six pollutants. All rows are classified in the “last 30 days” freshness bucket, with the most recent timestamp for every pollutant recorded at 2026‑02‑10 18:00 UTC; none of the observations are from today, the past three days, or the past week.

Across the pollutants the recorded values show a wide spread. CO values range from a low of 0.63 ppm to a maximum of 9 999 ppm, with a median of 0.875 ppm; NO₂ varies between 0.0157 ppm and 9 999 ppm, median 0.0264 ppm; O₃ spans 0.0026 ppm to 9 999 ppm, median 0.0083 ppm. For the particulates, PM10 values start at 50 µg/m³ and reach 9 999 µg/m³, with a median of 59 µg/m³, while PM2.5 shows a minimum of 44 µg/m³, a median of 5 022.5 µg/m³ and the same high ceiling of 9 999 µg/m³. SO₂ is recorded between 0.0022 ppm and 9 999 ppm, median 0.0025 ppm. The 10th‑percentile figures are close to the minima for each pollutant, but the 90th‑percentile values climb into the thousands, indicating that a small number of extreme readings dominate the upper tail of the distribution.

Because the maximum values for all six pollutants are the placeholder 9 999, the dataset likely contains some out‑of‑range or error‑flagged entries. The median for PM2.5 is dramatically higher than for the other pollutants, suggesting that fine‑particle concentrations are frequently recorded at elevated levels at the monitored sites. Overall, the data give a snapshot of air‑quality conditions across four locations in Chuncheon‑si as of early February 2026, but the lack of very recent updates and the presence of extreme placeholder values mean that conditions can still vary by place and time.

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

This dataset includes 17 valid measurements and has been updated within 30 days, with the most recent update on 2026-02-10 at 18:00 UTC. The values reflect conditions recorded at monitoring stations across Chuncheon-si, but air quality can vary by location and time within the city. Users should consider this snapshot as a representative sample rather than a comprehensive, real‑time picture.

OpenAQ station rows