Air Quality
Excellent
No health implications.
9
PM2.5
28
PM10
83
O3
0.5
CO
10
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
23 Feb
45
Excellent
Mon
24 Feb
63
Good
Tue
25 Feb
98
Good
Wed
26 Feb
67
Good
Thu
27 Feb
71
Good
Fri
28 Feb
69
Good
Sat
1 Mar
20
Excellent
Air quality in the last 12 months (Changhai)
|
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
|
|
|
2024/08
|
30
|
40
|
37
|
24
|
16
|
22
|
19
|
28
|
38
|
21
|
36
|
55
|
45
|
46
|
49
|
49
|
55
|
36
|
17
|
20
|
28
|
28
|
30
|
46
|
35
|
28
|
30
|
33
|
32
|
40
|
24
|
|
2024/07
|
48
|
28
|
32
|
42
|
39
|
18
|
38
|
38
|
55
|
42
|
52
|
63
|
53
|
49
|
38
|
14
|
23
|
38
|
46
|
18
|
24
|
24
|
19
|
20
|
15
|
21
|
13
|
22
|
22
|
28
|
28
|
|
2024/06
|
23
|
36
|
39
|
30
|
21
|
25
|
24
|
24
|
40
|
42
|
45
|
28
|
22
|
20
|
24
|
26
|
50
|
44
|
22
|
21
|
21
|
18
|
46
|
25
|
23
|
23
|
23
|
21
|
19
|
29
|
|
|
2024/05
|
47
|
53
|
52
|
33
|
20
|
45
|
52
|
50
|
78
|
45
|
93
|
33
|
43
|
71
|
42
|
36
|
42
|
30
|
30
|
44
|
39
|
18
|
28
|
42
|
34
|
26
|
19
|
27
|
35
|
26
|
26
|
|
2024/04
|
64
|
49
|
56
|
59
|
69
|
78
|
95
|
93
|
106
|
87
|
51
|
29
|
16
|
20
|
53
|
82
|
54
|
73
|
78
|
78
|
65
|
40
|
27
|
18
|
32
|
46
|
41
|
52
|
55
|
48
|
|
|
2024/03
|
42
|
66
|
57
|
69
|
68
|
46
|
60
|
52
|
49
|
51
|
56
|
64
|
84
|
110
|
112
|
85
|
89
|
57
|
46
|
26
|
43
|
46
|
45
|
61
|
54
|
60
|
67
|
205
|
88
|
73
|
61
|
|
2024/02
|
36
|
62
|
76
|
64
|
80
|
54
|
51
|
62
|
124
|
250
|
81
|
113
|
84
|
66
|
44
|
47
|
33
|
26
|
40
|
45
|
51
|
39
|
52
|
94
|
93
|
64
|
74
|
99
|
74
|
||
|
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