Air Quality
Excellent
No health implications.
11
PM2.5
18
PM10
45
O3
0.1
CO
9
SO2
8
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
20 Aug
50
Excellent
Thu
21 Aug
50
Excellent
Fri
22 Aug
50
Excellent
Sat
23 Aug
50
Excellent
Chiayi Air quality rank
Real-time AQI (Monitoring Station in Chiayi)
新港
2411
PM2.5
18
PM10
45
O3
0.1
CO
9
SO2
8
NO2
Air quality in the last 12 months (Chiayi)
|
2025/06
|
46
|
36
|
17
|
26
|
30
|
23
|
19
|
23
|
21
|
23
|
20
|
25
|
28
|
31
|
34
|
29
|
25
|
28
|
22
|
20
|
18
|
24
|
28
|
28
|
20
|
16
|
16
|
22
|
16
|
16
|
|
|
2025/05
|
51
|
54
|
47
|
36
|
41
|
39
|
46
|
52
|
48
|
31
|
29
|
39
|
32
|
31
|
24
|
20
|
20
|
17
|
25
|
30
|
21
|
36
|
40
|
21
|
50
|
40
|
24
|
21
|
12
|
35
|
44
|
|
2025/04
|
22
|
36
|
45
|
43
|
48
|
47
|
53
|
56
|
48
|
42
|
35
|
17
|
112
|
104
|
86
|
71
|
65
|
50
|
48
|
31
|
38
|
39
|
33
|
25
|
19
|
27
|
30
|
45
|
32
|
37
|
|
|
2025/03
|
62
|
30
|
24
|
20
|
13
|
17
|
35
|
42
|
28
|
29
|
42
|
36
|
32
|
28
|
36
|
26
|
50
|
48
|
46
|
47
|
48
|
47
|
60
|
69
|
51
|
32
|
50
|
52
|
54
|
21
|
17
|
|
2025/02
|
39
|
18
|
23
|
65
|
56
|
35
|
26
|
48
|
35
|
30
|
39
|
60
|
68
|
47
|
39
|
60
|
65
|
40
|
37
|
24
|
21
|
32
|
19
|
61
|
57
|
53
|
62
|
80
|
|||
|
2025/01
|
48
|
38
|
34
|
30
|
37
|
49
|
63
|
45
|
49
|
43
|
35
|
46
|
44
|
41
|
78
|
54
|
54
|
40
|
46
|
50
|
77
|
49
|
44
|
20
|
32
|
35
|
20
|
43
|
47
|
33
|
39
|
|
2024/12
|
39
|
46
|
34
|
31
|
27
|
30
|
26
|
60
|
27
|
19
|
26
|
21
|
27
|
56
|
73
|
48
|
38
|
42
|
44
|
21
|
42
|
57
|
21
|
20
|
20
|
44
|
60
|
74
|
38
|
39
|
48
|
|
2024/11
|
22
|
19
|
35
|
38
|
48
|
41
|
35
|
30
|
26
|
22
|
21
|
26
|
26
|
22
|
21
|
15
|
23
|
34
|
19
|
13
|
18
|
28
|
32
|
22
|
28
|
20
|
39
|
31
|
40
|
39
|
|
|
2024/10
|
18
|
16
|
20
|
17
|
20
|
21
|
18
|
17
|
37
|
44
|
43
|
32
|
24
|
26
|
27
|
27
|
36
|
36
|
33
|
22
|
28
|
36
|
45
|
38
|
24
|
25
|
25
|
24
|
36
|
40
|
25
|
|
2024/09
|
29
|
30
|
28
|
26
|
24
|
20
|
20
|
15
|
21
|
41
|
53
|
35
|
18
|
22
|
29
|
22
|
28
|
28
|
24
|
20
|
24
|
10
|
12
|
15
|
26
|
16
|
19
|
24
|
25
|
21
|
|
|
2024/08
|
28
|
42
|
42
|
33
|
37
|
23
|
27
|
38
|
41
|
44
|
47
|
48
|
45
|
36
|
29
|
14
|
20
|
19
|
15
|
13
|
21
|
27
|
36
|
41
|
35
|
38
|
46
|
43
|
42
|
31
|
31
|
|
2024/07
|
20
|
18
|
19
|
20
|
24
|
19
|
17
|
17
|
15
|
17
|
24
|
27
|
22
|
21
|
21
|
18
|
20
|
18
|
25
|
24
|
20
|
19
|
26
|
20
|
17
|
18
|
22
|
28
|
23
|
19
|
15
|
|
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