Air Quality
Excellent
No health implications.
23
PM2.5
33
PM10
122
O3
0.5
CO
4
SO2
13
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Apr
68
Good
Sun
20 Apr
96
Good
Mon
21 Apr
93
Good
Tue
22 Apr
65
Good
Wed
23 Apr
69
Good
Thu
24 Apr
38
Excellent
Fri
25 Apr
17
Excellent
Air quality in the last 12 months (Haidian)
|
2025/02
|
92
|
51
|
10
|
17
|
25
|
60
|
21
|
14
|
20
|
63
|
120
|
26
|
60
|
63
|
83
|
29
|
20
|
34
|
24
|
16
|
20
|
17
|
20
|
50
|
46
|
55
|
108
|
130
|
|||
|
2025/01
|
44
|
23
|
38
|
59
|
49
|
17
|
14
|
14
|
16
|
25
|
37
|
35
|
52
|
22
|
29
|
48
|
67
|
79
|
34
|
56
|
42
|
59
|
79
|
115
|
140
|
100
|
19
|
21
|
88
|
63
|
76
|
|
2024/12
|
55
|
16
|
37
|
35
|
19
|
28
|
15
|
32
|
56
|
44
|
42
|
71
|
29
|
25
|
34
|
36
|
20
|
18
|
44
|
39
|
17
|
33
|
50
|
68
|
59
|
28
|
20
|
39
|
63
|
67
|
48
|
|
2024/11
|
151
|
143
|
67
|
14
|
44
|
60
|
93
|
152
|
175
|
132
|
78
|
101
|
88
|
54
|
77
|
46
|
30
|
44
|
58
|
70
|
23
|
36
|
52
|
83
|
41
|
9
|
15
|
17
|
33
|
55
|
|
|
2024/10
|
8
|
18
|
35
|
66
|
85
|
89
|
28
|
33
|
86
|
20
|
51
|
87
|
129
|
127
|
42
|
47
|
60
|
44
|
11
|
38
|
54
|
24
|
44
|
62
|
160
|
219
|
26
|
49
|
99
|
118
|
160
|
|
2024/09
|
23
|
14
|
33
|
67
|
18
|
20
|
26
|
28
|
59
|
14
|
25
|
30
|
38
|
21
|
35
|
44
|
28
|
43
|
53
|
28
|
8
|
16
|
38
|
59
|
45
|
40
|
49
|
57
|
72
|
9
|
|
|
2024/08
|
18
|
33
|
31
|
29
|
14
|
38
|
48
|
37
|
45
|
23
|
22
|
8
|
15
|
29
|
47
|
42
|
37
|
23
|
23
|
13
|
15
|
24
|
39
|
27
|
34
|
14
|
18
|
31
|
41
|
51
|
56
|
|
2024/07
|
25
|
39
|
39
|
63
|
80
|
32
|
36
|
33
|
68
|
75
|
80
|
43
|
59
|
86
|
60
|
46
|
17
|
28
|
47
|
33
|
49
|
31
|
55
|
45
|
16
|
19
|
26
|
26
|
38
|
12
|
20
|
|
2024/06
|
30
|
46
|
54
|
60
|
62
|
67
|
55
|
49
|
39
|
46
|
36
|
50
|
56
|
33
|
23
|
56
|
71
|
68
|
68
|
62
|
52
|
93
|
169
|
22
|
34
|
66
|
64
|
60
|
63
|
46
|
|
|
2024/05
|
49
|
65
|
64
|
77
|
88
|
67
|
58
|
70
|
73
|
94
|
105
|
42
|
54
|
61
|
27
|
61
|
60
|
81
|
63
|
31
|
47
|
73
|
75
|
36
|
28
|
18
|
38
|
55
|
69
|
44
|
17
|
|
2024/04
|
79
|
87
|
79
|
71
|
76
|
95
|
44
|
88
|
62
|
65
|
113
|
159
|
81
|
62
|
92
|
63
|
97
|
92
|
67
|
53
|
87
|
96
|
20
|
55
|
99
|
122
|
95
|
25
|
26
|
24
|
|
|
2024/03
|
40
|
87
|
56
|
57
|
72
|
57
|
57
|
25
|
65
|
113
|
74
|
48
|
68
|
67
|
110
|
117
|
43
|
112
|
87
|
59
|
94
|
70
|
88
|
83
|
82
|
112
|
151
|
213
|
103
|
50
|
87
|
|
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