Open Government Data Portal

This information provided by Seoul Metro is about indoor air quality in subway stations managed by the Corporation. As of 2021, indoor air quality measuring devices have been installed in a total of 259 stations from Lines 1 to 8, and air quality within each station is collected on an hourly basis, nearly in real time. This information is public data for the health and safety of citizens, and measured items include fine dust (PM10), ultrafine dust (PM2.5), carbon dioxide (CO₂), formaldehyde (HCHO), carbon monoxide (CO), nitrogen dioxide (NO₂), and volatile organic compounds (VOCs), allowing for a comprehensive understanding of air pollution levels within stations.