Air Quality
Excellent
No health implications.
17
PM2.5
40
PM10
61
O3
0.5
CO
4
SO2
15
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 Mar
57
Good
Tue
18 Mar
59
Good
Wed
19 Mar
59
Good
Thu
20 Mar
56
Good
Fri
21 Mar
63
Good
Sat
22 Mar
59
Good
Sun
23 Mar
48
Excellent
Air quality in the last 12 months (Yilan)
|
2025/02
|
73
|
96
|
105
|
75
|
49
|
47
|
44
|
43
|
48
|
65
|
73
|
78
|
53
|
49
|
57
|
40
|
39
|
30
|
35
|
49
|
48
|
42
|
42
|
41
|
48
|
38
|
54
|
68
|
|||
|
2025/01
|
91
|
98
|
98
|
109
|
111
|
99
|
85
|
67
|
47
|
70
|
94
|
106
|
115
|
121
|
74
|
55
|
75
|
98
|
128
|
136
|
139
|
143
|
128
|
114
|
117
|
126
|
59
|
53
|
74
|
55
|
59
|
|
2024/12
|
60
|
42
|
35
|
30
|
36
|
37
|
46
|
51
|
65
|
70
|
51
|
55
|
59
|
58
|
46
|
46
|
54
|
51
|
66
|
94
|
80
|
75
|
66
|
60
|
69
|
38
|
50
|
63
|
64
|
72
|
70
|
|
2024/11
|
72
|
50
|
52
|
39
|
56
|
41
|
50
|
59
|
77
|
59
|
79
|
75
|
90
|
122
|
96
|
55
|
30
|
33
|
62
|
89
|
88
|
45
|
46
|
54
|
62
|
42
|
34
|
44
|
44
|
39
|
|
|
2024/10
|
18
|
27
|
21
|
30
|
44
|
36
|
35
|
50
|
49
|
44
|
22
|
33
|
41
|
48
|
23
|
26
|
42
|
41
|
28
|
41
|
31
|
33
|
38
|
46
|
59
|
60
|
52
|
58
|
67
|
60
|
61
|
|
2024/09
|
18
|
19
|
24
|
24
|
16
|
17
|
18
|
26
|
24
|
19
|
21
|
33
|
22
|
26
|
20
|
31
|
32
|
29
|
23
|
23
|
25
|
23
|
25
|
28
|
31
|
21
|
27
|
38
|
35
|
25
|
|
|
2024/08
|
13
|
13
|
14
|
18
|
14
|
15
|
24
|
25
|
23
|
28
|
15
|
16
|
19
|
30
|
27
|
32
|
27
|
34
|
15
|
18
|
25
|
24
|
22
|
24
|
25
|
22
|
23
|
20
|
25
|
22
|
20
|
|
2024/07
|
77
|
52
|
50
|
32
|
29
|
50
|
60
|
55
|
53
|
41
|
58
|
54
|
34
|
47
|
45
|
52
|
36
|
25
|
30
|
33
|
26
|
22
|
26
|
22
|
20
|
13
|
12
|
21
|
19
|
15
|
21
|
|
2024/06
|
17
|
14
|
19
|
17
|
27
|
31
|
37
|
27
|
21
|
21
|
29
|
20
|
19
|
11
|
13
|
14
|
16
|
20
|
28
|
24
|
17
|
14
|
11
|
13
|
16
|
20
|
20
|
47
|
41
|
58
|
|
|
2024/05
|
47
|
54
|
53
|
72
|
86
|
54
|
41
|
38
|
31
|
30
|
25
|
23
|
22
|
25
|
18
|
23
|
24
|
39
|
19
|
18
|
17
|
36
|
21
|
19
|
19
|
21
|
16
|
21
|
17
|
17
|
15
|
|
2024/04
|
33
|
38
|
49
|
33
|
40
|
60
|
25
|
28
|
46
|
67
|
79
|
69
|
57
|
70
|
71
|
56
|
32
|
52
|
39
|
66
|
129
|
133
|
101
|
82
|
68
|
52
|
42
|
43
|
49
|
45
|
|
|
2024/03
|
38
|
36
|
42
|
48
|
46
|
46
|
53
|
40
|
37
|
52
|
59
|
44
|
51
|
50
|
37
|
24
|
24
|
34
|
34
|
32
|
31
|
30
|
33
|
26
|
30
|
37
|
35
|
232
|
94
|
36
|
29
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
- Excellent
- Good
- Lightly
- Moderately
- Heavily
- Severely
Air quality source: CNEMC
*: primary pollution