Air Quality
Excellent
No health implications.
7
PM2.5
19
PM10
26
O3
0.5
CO
2
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
29 Jun
48
Excellent
Mon
30 Jun
49
Excellent
Tue
1 Jul
59
Good
Wed
2 Jul
62
Good
Thu
3 Jul
55
Good
Fri
4 Jul
51
Good
Sat
5 Jul
35
Excellent
Air quality in the last 12 months (Chenghai)
|
2025/05
|
55
|
55
|
48
|
36
|
39
|
33
|
37
|
49
|
39
|
29
|
27
|
42
|
41
|
42
|
32
|
21
|
21
|
26
|
27
|
24
|
22
|
31
|
28
|
26
|
24
|
37
|
40
|
34
|
15
|
24
|
37
|
|
2025/04
|
22
|
43
|
51
|
53
|
37
|
46
|
65
|
68
|
66
|
47
|
41
|
43
|
123
|
104
|
98
|
80
|
64
|
57
|
38
|
37
|
37
|
34
|
34
|
33
|
17
|
20
|
34
|
50
|
40
|
45
|
|
|
2025/03
|
108
|
37
|
30
|
24
|
14
|
17
|
23
|
33
|
39
|
44
|
59
|
72
|
61
|
25
|
54
|
15
|
42
|
56
|
46
|
50
|
53
|
52
|
63
|
77
|
72
|
51
|
29
|
50
|
34
|
14
|
12
|
|
2025/02
|
61
|
23
|
15
|
35
|
56
|
42
|
23
|
38
|
43
|
36
|
50
|
56
|
63
|
39
|
51
|
83
|
57
|
51
|
31
|
30
|
26
|
25
|
37
|
32
|
52
|
59
|
65
|
115
|
|||
|
2025/01
|
52
|
62
|
63
|
48
|
56
|
59
|
54
|
55
|
60
|
49
|
49
|
45
|
50
|
56
|
83
|
99
|
58
|
49
|
59
|
57
|
57
|
73
|
70
|
34
|
33
|
28
|
26
|
39
|
58
|
41
|
44
|
|
2024/12
|
52
|
59
|
58
|
45
|
41
|
39
|
49
|
39
|
44
|
32
|
43
|
34
|
31
|
53
|
54
|
53
|
56
|
53
|
56
|
47
|
46
|
67
|
53
|
44
|
42
|
50
|
61
|
87
|
66
|
62
|
72
|
|
2024/11
|
29
|
19
|
32
|
44
|
43
|
42
|
30
|
35
|
33
|
33
|
41
|
37
|
23
|
29
|
40
|
23
|
26
|
23
|
15
|
12
|
15
|
26
|
31
|
28
|
32
|
20
|
32
|
34
|
37
|
47
|
|
|
2024/10
|
22
|
21
|
29
|
26
|
26
|
37
|
30
|
21
|
30
|
36
|
45
|
40
|
36
|
35
|
29
|
28
|
29
|
46
|
45
|
25
|
23
|
37
|
34
|
34
|
40
|
40
|
48
|
26
|
28
|
53
|
39
|
|
2024/09
|
31
|
43
|
41
|
31
|
26
|
16
|
16
|
14
|
18
|
31
|
54
|
39
|
33
|
29
|
21
|
28
|
28
|
25
|
31
|
18
|
15
|
19
|
14
|
16
|
24
|
32
|
31
|
26
|
33
|
34
|
|
|
2024/08
|
27
|
31
|
31
|
40
|
40
|
36
|
33
|
41
|
40
|
33
|
34
|
36
|
37
|
29
|
28
|
24
|
13
|
20
|
14
|
13
|
16
|
29
|
25
|
27
|
51
|
41
|
46
|
41
|
39
|
26
|
21
|
|
2024/07
|
23
|
20
|
13
|
17
|
16
|
17
|
16
|
13
|
15
|
18
|
18
|
22
|
19
|
16
|
20
|
18
|
15
|
15
|
18
|
19
|
16
|
16
|
35
|
32
|
38
|
16
|
22
|
23
|
26
|
21
|
29
|
|
2024/06
|
20
|
13
|
23
|
27
|
23
|
34
|
19
|
21
|
25
|
23
|
18
|
24
|
23
|
25
|
29
|
19
|
19
|
17
|
17
|
16
|
22
|
23
|
22
|
16
|
16
|
17
|
20
|
19
|
25
|
43
|
|
|
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