Air Quality
Excellent
No health implications.
3
PM2.5
11
PM10
21
O3
0.4
CO
6
SO2
4
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 Sep
22
Excellent
Thu
18 Sep
24
Excellent
Fri
19 Sep
22
Excellent
Sat
20 Sep
43
Excellent
Sun
21 Sep
43
Excellent
Mon
22 Sep
32
Excellent
Tue
23 Sep
32
Excellent
Air quality in the last 12 months (Chengmai)
|
2025/08
|
28
|
31
|
33
|
30
|
26
|
31
|
28
|
24
|
25
|
23
|
18
|
20
|
19
|
18
|
16
|
12
|
15
|
8
|
15
|
21
|
20
|
15
|
14
|
18
|
14
|
15
|
14
|
16
|
15
|
15
|
14
|
|
2025/07
|
15
|
14
|
11
|
15
|
16
|
19
|
16
|
22
|
24
|
25
|
21
|
20
|
25
|
27
|
27
|
26
|
21
|
23
|
16
|
13
|
8
|
15
|
18
|
15
|
16
|
17
|
19
|
15
|
20
|
17
|
20
|
|
2025/06
|
20
|
20
|
27
|
27
|
15
|
16
|
20
|
23
|
20
|
23
|
18
|
13
|
10
|
11
|
16
|
17
|
21
|
17
|
15
|
16
|
17
|
13
|
14
|
14
|
11
|
10
|
13
|
15
|
16
|
16
|
|
|
2025/05
|
23
|
21
|
27
|
26
|
21
|
25
|
23
|
18
|
23
|
18
|
24
|
38
|
24
|
14
|
12
|
16
|
14
|
18
|
18
|
18
|
18
|
16
|
18
|
15
|
27
|
37
|
29
|
20
|
16
|
13
|
12
|
|
2025/04
|
21
|
33
|
30
|
32
|
34
|
20
|
35
|
33
|
39
|
37
|
35
|
36
|
145
|
166
|
133
|
106
|
84
|
51
|
37
|
30
|
25
|
29
|
27
|
31
|
32
|
24
|
18
|
27
|
28
|
26
|
|
|
2025/03
|
29
|
27
|
33
|
33
|
32
|
14
|
12
|
15
|
32
|
39
|
33
|
25
|
20
|
23
|
29
|
17
|
33
|
39
|
48
|
49
|
43
|
42
|
37
|
43
|
43
|
41
|
43
|
40
|
18
|
9
|
15
|
|
2025/02
|
30
|
19
|
30
|
25
|
26
|
35
|
42
|
32
|
53
|
42
|
30
|
19
|
28
|
23
|
18
|
22
|
32
|
45
|
43
|
33
|
36
|
22
|
22
|
27
|
23
|
31
|
35
|
28
|
|||
|
2025/01
|
66
|
48
|
60
|
50
|
58
|
71
|
46
|
52
|
62
|
65
|
49
|
45
|
42
|
33
|
41
|
56
|
58
|
49
|
51
|
56
|
42
|
52
|
43
|
38
|
28
|
30
|
30
|
32
|
47
|
44
|
41
|
|
2024/12
|
39
|
34
|
34
|
31
|
35
|
37
|
51
|
39
|
38
|
29
|
33
|
47
|
42
|
43
|
58
|
44
|
38
|
48
|
48
|
51
|
50
|
50
|
54
|
55
|
55
|
45
|
63
|
64
|
59
|
44
|
57
|
|
2024/11
|
48
|
43
|
33
|
28
|
42
|
47
|
51
|
47
|
51
|
47
|
46
|
42
|
49
|
52
|
40
|
35
|
28
|
28
|
26
|
8
|
16
|
28
|
30
|
29
|
23
|
27
|
34
|
38
|
40
|
44
|
|
|
2024/10
|
30
|
31
|
42
|
47
|
39
|
41
|
29
|
54
|
63
|
54
|
38
|
31
|
29
|
19
|
16
|
11
|
11
|
15
|
18
|
26
|
29
|
35
|
30
|
34
|
38
|
45
|
22
|
28
|
17
|
30
|
42
|
|
2024/09
|
14
|
16
|
16
|
24
|
28
|
18
|
14
|
26
|
22
|
16
|
12
|
19
|
23
|
21
|
26
|
27
|
21
|
21
|
15
|
11
|
15
|
12
|
12
|
14
|
21
|
30
|
27
|
21
|
21
|
22
|
|
|
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