Air Quality
Excellent
No health implications.
4
PM2.5
27
PM10
47
O3
0.5
CO
10
SO2
15
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
26 Oct
53
Good
Mon
27 Oct
62
Good
Tue
28 Oct
60
Good
Wed
29 Oct
60
Good
Thu
30 Oct
68
Good
Fri
31 Oct
63
Good
Sat
1 Nov
39
Excellent
Air quality in the last 12 months (Changhai)
|
2025/08
|
16
|
23
|
24
|
22
|
31
|
25
|
23
|
30
|
16
|
23
|
24
|
20
|
24
|
24
|
16
|
20
|
17
|
24
|
20
|
18
|
21
|
19
|
31
|
27
|
17
|
19
|
24
|
22
|
16
|
20
|
14
|
|
2025/07
|
17
|
15
|
17
|
20
|
40
|
32
|
37
|
21
|
32
|
39
|
29
|
27
|
35
|
29
|
27
|
15
|
18
|
35
|
22
|
17
|
20
|
15
|
16
|
23
|
29
|
22
|
24
|
29
|
19
|
20
|
28
|
|
2025/06
|
58
|
49
|
32
|
25
|
37
|
55
|
41
|
29
|
25
|
21
|
33
|
19
|
15
|
17
|
24
|
21
|
31
|
33
|
22
|
21
|
25
|
37
|
33
|
31
|
34
|
27
|
29
|
47
|
21
|
13
|
|
|
2025/05
|
38
|
24
|
20
|
32
|
33
|
30
|
34
|
32
|
40
|
42
|
48
|
50
|
50
|
43
|
48
|
18
|
31
|
33
|
40
|
41
|
35
|
73
|
50
|
42
|
51
|
47
|
35
|
36
|
32
|
39
|
43
|
|
2025/04
|
67
|
59
|
57
|
54
|
43
|
40
|
53
|
56
|
46
|
50
|
46
|
42
|
23
|
21
|
31
|
45
|
66
|
34
|
38
|
49
|
33
|
25
|
43
|
45
|
34
|
54
|
45
|
31
|
52
|
60
|
|
|
2025/03
|
57
|
72
|
42
|
48
|
46
|
60
|
63
|
76
|
109
|
120
|
70
|
66
|
65
|
54
|
62
|
43
|
47
|
43
|
48
|
79
|
57
|
62
|
84
|
100
|
126
|
91
|
66
|
30
|
32
|
31
|
59
|
|
2025/02
|
81
|
102
|
36
|
32
|
28
|
39
|
51
|
51
|
45
|
54
|
56
|
38
|
65
|
89
|
93
|
60
|
30
|
31
|
42
|
44
|
43
|
36
|
31
|
43
|
63
|
72
|
101
|
87
|
|||
|
2025/01
|
47
|
36
|
34
|
64
|
149
|
51
|
36
|
46
|
35
|
47
|
60
|
77
|
78
|
64
|
37
|
57
|
47
|
69
|
103
|
68
|
69
|
53
|
49
|
76
|
111
|
152
|
65
|
53
|
130
|
49
|
64
|
|
2024/12
|
53
|
29
|
31
|
35
|
33
|
30
|
32
|
42
|
49
|
55
|
37
|
46
|
54
|
39
|
36
|
52
|
38
|
39
|
40
|
76
|
41
|
43
|
46
|
49
|
89
|
43
|
41
|
44
|
49
|
83
|
36
|
|
2024/11
|
86
|
60
|
57
|
37
|
22
|
31
|
41
|
43
|
45
|
57
|
37
|
46
|
29
|
38
|
46
|
36
|
20
|
24
|
33
|
79
|
63
|
35
|
50
|
39
|
33
|
18
|
19
|
33
|
43
|
45
|
|
|
2024/10
|
13
|
21
|
17
|
21
|
30
|
47
|
37
|
39
|
23
|
36
|
29
|
44
|
36
|
23
|
26
|
24
|
33
|
54
|
48
|
38
|
24
|
24
|
24
|
64
|
64
|
76
|
48
|
43
|
45
|
58
|
62
|
|
2024/09
|
28
|
22
|
26
|
25
|
21
|
20
|
34
|
26
|
28
|
29
|
31
|
36
|
56
|
34
|
34
|
39
|
40
|
47
|
45
|
27
|
20
|
27
|
27
|
19
|
42
|
44
|
42
|
40
|
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