Air Quality
Excellent
No health implications.
13
PM2.5
22
PM10
53
O3
0.3
CO
8
SO2
10
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 Mar
57
Good
Tue
18 Mar
57
Good
Wed
19 Mar
61
Good
Thu
20 Mar
59
Good
Fri
21 Mar
64
Good
Sat
22 Mar
36
Excellent
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