Table 3 Difference of National weather announcement and measured value of PM (μg/m³)

Difference of announcement and measured value
Park No.	2019-05-14						2019-05-16						2019-05-24						Total Average
	PM2.5			PM10			PM2.5			PM10			PM2.5			PM10			PM2.5	PM10
	A	E	A-E	A	E	A-E	A	E	A-E	A	E	A-E	A	E	A-E	A	E	A-E	A-E	A-E
1	24	97	73	53	98	45	34	48	14	55	45	−10	36	42	6	74	43	−31	31.00	1.33
2	28	71	43	56	71	15	34	43	9	45	43	−2	36	43	7	74	50	−24	19.67	−3.67
3	24	74	50	53	78	25	34	49	15	55	45	−10	34	45	11	75	47	−28	25.33	−4.33
4	28	65	37	60	65	5	32	58	26	61	57	−4	34	54	20	75	46	−29	27.67	−9.33
5	24	51	27	60	54	−6	38	55	17	69	60	−9	29	40	11	72	40	−32	18.33	−15.67
6	23	74	51	60	84	24	37	57	20	48	62	14	34	43	9	75	44	−31	26.67	2.33
7	24	42	18	60	47	−13	38	53	15	69	55	−14	29	40	11	72	41	−31	14.67	−19.33
Ave.	25.00	67.71	42.71	57.43	71.00	13.57	35.29	51.86	16.57	57.43	52.43	−5.00	33.14	43.86	10.71	73.86	44.43	−29.43	23.33	−6.95
Std.	2.08	17.77	17.93	3.36	17.55	19.97	2.36	5.43	5.32	9.45	7.91	9.29	2.97	4.81	4.57	1.35	3.51	2.76	9.27	10.67

A : National weather announcement, E : Entrance of urban neighborhood park.