Air Quality
Excellent
No health implications.
7
PM2.5
18
PM10
73
O3
0.3
CO
4
SO2
14
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Jan
37
Excellent
Mon
20 Jan
60
Good
Tue
21 Jan
40
Excellent
Wed
22 Jan
68
Good
Thu
23 Jan
86
Good
Fri
24 Jan
100
Good
Sat
25 Jan
15
Excellent
Air quality in the last 12 months (Haidian)
|
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
|
|
2024/02
|
41
|
59
|
79
|
112
|
93
|
52
|
30
|
33
|
56
|
41
|
82
|
101
|
137
|
62
|
29
|
69
|
93
|
90
|
39
|
25
|
23
|
22
|
37
|
65
|
55
|
79
|
78
|
72
|
28
|
||
|
2024/01
|
102
|
99
|
40
|
67
|
49
|
19
|
30
|
65
|
50
|
55
|
88
|
118
|
77
|
26
|
46
|
79
|
121
|
98
|
68
|
59
|
21
|
21
|
21
|
31
|
35
|
42
|
42
|
59
|
94
|
124
|
66
|
|
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