Air Quality
Excellent
No health implications.
19
PM2.5
28
PM10
85
O3
0.5
CO
6
SO2
3
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 Apr
44
Excellent
Wed
22 Apr
39
Excellent
Thu
23 Apr
40
Excellent
Fri
24 Apr
38
Excellent
Sat
25 Apr
40
Excellent
Sun
26 Apr
37
Excellent
Mon
27 Apr
26
Excellent
Air quality in the last 12 months (Chengmai)
|
2026/03
|
15
|
23
|
25
|
12
|
19
|
29
|
32
|
35
|
30
|
24
|
31
|
35
|
40
|
42
|
38
|
35
|
28
|
26
|
26
|
23
|
24
|
27
|
30
|
28
|
26
|
27
|
32
|
37
|
34
|
28
|
35
|
|
2026/02
|
29
|
31
|
28
|
33
|
30
|
22
|
21
|
36
|
35
|
32
|
28
|
23
|
31
|
29
|
27
|
27
|
32
|
39
|
35
|
35
|
37
|
27
|
25
|
28
|
37
|
31
|
35
|
17
|
|||
|
2026/01
|
32
|
43
|
33
|
38
|
44
|
54
|
45
|
39
|
43
|
42
|
44
|
44
|
55
|
49
|
37
|
37
|
38
|
44
|
32
|
37
|
48
|
50
|
44
|
39
|
20
|
25
|
30
|
43
|
30
|
27
|
30
|
|
2025/12
|
41
|
23
|
33
|
54
|
43
|
54
|
40
|
60
|
51
|
43
|
48
|
34
|
35
|
27
|
50
|
40
|
46
|
47
|
44
|
36
|
32
|
40
|
34
|
32
|
32
|
36
|
39
|
39
|
40
|
36
|
46
|
|
2025/11
|
40
|
41
|
36
|
18
|
19
|
26
|
14
|
16
|
27
|
44
|
33
|
27
|
50
|
35
|
39
|
41
|
38
|
51
|
27
|
33
|
40
|
42
|
48
|
52
|
47
|
52
|
51
|
54
|
60
|
34
|
|
|
2025/10
|
15
|
14
|
12
|
15
|
16
|
13
|
17
|
16
|
20
|
24
|
22
|
15
|
9
|
11
|
15
|
21
|
23
|
30
|
33
|
31
|
22
|
20
|
22
|
25
|
39
|
42
|
35
|
36
|
36
|
20
|
41
|
|
2025/09
|
12
|
15
|
15
|
16
|
14
|
12
|
20
|
20
|
19
|
16
|
17
|
14
|
14
|
13
|
17
|
12
|
13
|
14
|
19
|
21
|
22
|
13
|
23
|
23
|
17
|
18
|
26
|
15
|
17
|
18
|
|
|
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
|
|
|
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