Table 3 PM2.5 concentrations during the pandemic and post-pandemic periods (µg/m3).

From: Source apportionment and dynamics of PM2.5 across regions during and after the coronavirus 2019 pandemic

Sampling site

Pandemic

Post-pandemic

p-value

N

Mean ± SD

Max

N

Mean ± SD

Max

Seoul

776

23.58 ± 13.60

90.89

1102

23.88 ± 13.25

83.94

0.61

Ansan–Siheung

785

29.29 ± 29.41

110.06

1093

29.41 ± 17.03

116.09

0.40

Wonju

745

24.54 ± 23.91

81.52

688

23.91 ± 12.95

70.07

0.68

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