Daily Air Quality in Seoul, 2015

Pollution readings in Seoul at times show conditions that could be unhealthy for residents. The graphic shows maximum, minimum and average readings for the pollutant PM2.5 that have been scaled to reflect health categories in the U.S. Environmental Protection Agency’s Air Quality Index, or AQI.

[Chart]

Notes

Daily averages created from data collected hourly by the city government in central Seoul’s Yongsan District.

Source: City of Seoul Research Institute of Public Health and Environment, EPA Air Quality Index calculator

Credit: Matt Stiles for NPR