Source apportionment of PM2.5 at the coastal area in Korea

► We analyzed the chemical compositions of PM2.5 collected at the coastal area in Korea. ► Source apportionment of PM2.5 was performed using Positive Matrix Factorization. ► The source areas of PM2.5 emissions were determined by CPF and PSCF analyses. ► The source apportionments were evaluated using organic compositions of PM2.5.