Air Quality
Excellent
No health implications.
22
PM2.5
36
PM10
50
O3
0.9
CO
16
SO2
18
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Oct
45
Excellent
Mon
20 Oct
53
Good
Tue
21 Oct
64
Good
Wed
22 Oct
60
Good
Thu
23 Oct
62
Good
Fri
24 Oct
38
Excellent
Sat
25 Oct
23
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