Air Quality
Excellent
No health implications.
26
PM2.5
47
PM10
38
O3
0.4
CO
8
SO2
20
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Dec
65
Good
Sat
20 Dec
64
Good
Sun
21 Dec
62
Good
Mon
22 Dec
64
Good
Tue
23 Dec
59
Good
Wed
24 Dec
60
Good
Thu
25 Dec
20
Excellent
Yilan Air quality rank
Air quality in the last 12 months (Yilan)
|
2025/11
|
90
|
52
|
43
|
50
|
99
|
93
|
58
|
82
|
62
|
31
|
57
|
62
|
48
|
61
|
68
|
75
|
52
|
49
|
85
|
93
|
55
|
129
|
156
|
105
|
67
|
97
|
88
|
72
|
60
|
50
|
|
|
2025/10
|
27
|
26
|
37
|
30
|
25
|
21
|
32
|
29
|
31
|
39
|
58
|
33
|
35
|
39
|
45
|
29
|
45
|
26
|
26
|
26
|
31
|
38
|
46
|
47
|
141
|
194
|
82
|
49
|
101
|
87
|
62
|
|
2025/09
|
24
|
19
|
18
|
31
|
28
|
17
|
16
|
16
|
16
|
18
|
22
|
27
|
32
|
30
|
19
|
20
|
16
|
16
|
19
|
24
|
21
|
20
|
24
|
29
|
21
|
19
|
27
|
26
|
29
|
39
|
|
|
2025/08
|
16
|
17
|
16
|
14
|
13
|
13
|
13
|
12
|
14
|
15
|
12
|
24
|
25
|
13
|
16
|
13
|
14
|
17
|
16
|
17
|
16
|
14
|
18
|
16
|
14
|
12
|
17
|
20
|
15
|
16
|
27
|
|
2025/07
|
17
|
16
|
14
|
18
|
18
|
15
|
14
|
17
|
15
|
13
|
19
|
19
|
16
|
14
|
13
|
12
|
15
|
17
|
17
|
11
|
11
|
21
|
19
|
20
|
14
|
12
|
16
|
12
|
18
|
9
|
13
|
|
2025/06
|
37
|
25
|
21
|
15
|
17
|
16
|
16
|
23
|
24
|
19
|
15
|
18
|
24
|
28
|
21
|
21
|
13
|
16
|
16
|
20
|
10
|
13
|
25
|
32
|
40
|
37
|
33
|
32
|
22
|
22
|
|
|
2025/05
|
38
|
37
|
24
|
24
|
22
|
28
|
31
|
26
|
26
|
24
|
43
|
66
|
69
|
47
|
30
|
26
|
25
|
21
|
24
|
25
|
29
|
19
|
19
|
23
|
16
|
21
|
29
|
35
|
44
|
45
|
47
|
|
2025/04
|
61
|
55
|
56
|
56
|
55
|
40
|
37
|
52
|
57
|
83
|
98
|
83
|
44
|
24
|
22
|
35
|
83
|
69
|
26
|
47
|
69
|
33
|
30
|
33
|
32
|
20
|
30
|
34
|
42
|
45
|
|
|
2025/03
|
25
|
35
|
32
|
42
|
47
|
54
|
51
|
46
|
61
|
79
|
63
|
49
|
27
|
26
|
28
|
27
|
30
|
35
|
41
|
70
|
54
|
18
|
32
|
43
|
40
|
52
|
29
|
20
|
20
|
28
|
41
|
|
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
|
|
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