Air Quality
Excellent
No health implications.
16
PM2.5
24
PM10
52
O3
0.4
CO
5
SO2
4
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Apr
44
Excellent
Sat
20 Apr
45
Excellent
Sun
21 Apr
43
Excellent
Mon
22 Apr
47
Excellent
Tue
23 Apr
42
Excellent
Wed
24 Apr
40
Excellent
Air quality in the last 12 months (Chengmai)
|
2024/02
|
24
|
25
|
22
|
23
|
22
|
23
|
33
|
11
|
17
|
58
|
50
|
48
|
37
|
33
|
32
|
37
|
33
|
24
|
28
|
33
|
31
|
30
|
34
|
29
|
27
|
25
|
24
|
26
|
35
|
||
|
2024/01
|
42
|
41
|
42
|
39
|
36
|
35
|
34
|
40
|
37
|
40
|
34
|
39
|
36
|
33
|
29
|
37
|
34
|
33
|
27
|
25
|
32
|
27
|
13
|
26
|
36
|
52
|
46
|
18
|
25
|
29
|
24
|
|
2023/12
|
39
|
42
|
44
|
47
|
61
|
42
|
31
|
36
|
33
|
24
|
22
|
23
|
31
|
23
|
24
|
23
|
14
|
23
|
24
|
24
|
34
|
40
|
52
|
47
|
46
|
46
|
48
|
44
|
31
|
34
|
51
|
|
2023/11
|
32
|
27
|
24
|
23
|
21
|
18
|
40
|
16
|
18
|
20
|
13
|
19
|
29
|
32
|
37
|
30
|
37
|
52
|
56
|
56
|
48
|
31
|
33
|
52
|
49
|
41
|
54
|
68
|
37
|
44
|
|
|
2023/10
|
20
|
26
|
22
|
27
|
28
|
33
|
36
|
34
|
25
|
21
|
15
|
29
|
32
|
36
|
50
|
44
|
38
|
23
|
17
|
15
|
18
|
26
|
36
|
31
|
24
|
22
|
12
|
14
|
25
|
33
|
42
|
|
2023/09
|
36
|
32
|
23
|
23
|
28
|
24
|
23
|
20
|
16
|
19
|
19
|
15
|
19
|
19
|
19
|
12
|
13
|
15
|
16
|
18
|
16
|
18
|
14
|
16
|
11
|
10
|
13
|
21
|
20
|
19
|
|
|
2023/08
|
18
|
18
|
13
|
16
|
23
|
27
|
26
|
21
|
23
|
26
|
23
|
20
|
25
|
26
|
24
|
28
|
26
|
27
|
26
|
19
|
16
|
19
|
19
|
18
|
20
|
21
|
24
|
22
|
21
|
21
|
30
|
|
2023/07
|
21
|
17
|
16
|
18
|
19
|
19
|
13
|
14
|
15
|
19
|
18
|
19
|
19
|
24
|
23
|
20
|
25
|
26
|
20
|
18
|
14
|
15
|
15
|
17
|
18
|
17
|
20
|
25
|
28
|
21
|
18
|
|
2023/06
|
30
|
27
|
28
|
23
|
18
|
19
|
18
|
21
|
23
|
23
|
21
|
25
|
26
|
24
|
28
|
23
|
23
|
21
|
22
|
23
|
24
|
23
|
22
|
21
|
22
|
19
|
15
|
17
|
18
|
20
|
|
|
2023/05
|
34
|
28
|
25
|
28
|
29
|
37
|
40
|
23
|
18
|
19
|
13
|
14
|
16
|
20
|
25
|
27
|
39
|
48
|
48
|
37
|
39
|
30
|
56
|
31
|
24
|
23
|
17
|
26
|
24
|
29
|
26
|
|
2023/04
|
34
|
32
|
31
|
32
|
37
|
39
|
38
|
24
|
38
|
32
|
39
|
35
|
37
|
36
|
33
|
48
|
41
|
39
|
43
|
52
|
56
|
42
|
34
|
22
|
32
|
28
|
27
|
24
|
28
|
29
|
|
|
2023/03
|
32
|
54
|
55
|
55
|
55
|
43
|
41
|
35
|
39
|
41
|
41
|
36
|
63
|
58
|
35
|
28
|
33
|
31
|
27
|
29
|
44
|
53
|
49
|
42
|
37
|
30
|
22
|
23
|
31
|
30
|
32
|
|
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