Table 3.
Particulate matter data by Jingu and Songsanghyeon Plaza

Classification		Jingu Junpodong PM2.5 data Mean (μg/m3)	Songsanghyeon Plaza PM2.5 data(μg/m3)
			A			B			C			D			E
			Ave	Min	Max	Ave	Min	Max	Ave	Min	Max	Ave	Min	Max	Ave	Min	Max
Good level (0~15μg/m3)	2020-12-15	11.8	7.3	4.9	13.6	7.1	4.9	12.1	6.3	4.6	9.6	5.7	3.7	9.2	6.0	4.2	8.7
	2021-02-23	11.5	7.1	3.9	10.3	6.6	3.6	9.5	6.7	3.5	11.8	5.9	3.1	9.0	5.6	3.3	7.9
	2021-02-28	10.8	10.8	8.4	13.1	10.7	9.2	12.2	11.2	9.0	14.9	9.5	8.1	11.2	8.6	6.9	10.4
Moderate level (16~35μg/m3)	2021-01-16	31.7	36.9	21.7	50.1	36.3	21.8	47.1	37.4	21.7	47.8	32.7	19.1	49.7	29.6	17.1	38.9
	2021-02-19	20.5	12.4	7.4	16.9	12.3	7.5	16.0	12.8	7.4	18.8	11.0	6.8	16.6	11.1	6.5	14.7
	2021-02-22	18.5	27.5	21.0	35.5	27.7	20.4	35.6	27.9	21.2	34.2	24.6	17.6	32.9	25.3	18.7	33.4
Unhealthy level (36~75μg/m3)	2020-12-29	32.5	32.9	25.2	43.4	32.6	24.7	53.7	32.7	23.8	46.8	29.4	21.7	42.8	30.9	20.6	50.0
	2021-01-14	46.8	42.8	29.9	52.8	42.6	29.3	56.1	42.7	29.3	55.6	39.3	27.7	57.4	38.6	23.6	58.3
	2021-02-21	39.3	27.3	19.0	40.0	26.6	17.9	40.4	27.1	18.8	40.5	23.8	16.6	34.4	24.3	16.1	37.4

A: Roadside square, B: Sunken square, C: A mix of trees and hedges/shrubs, D: Trees only, E: Grass square.