Air Quality
Excellent
No health implications.
15
PM2.5
48
PM10
91
O3
0.3
CO
5
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
4 May
60
Good
Mon
5 May
69
Good
Tue
6 May
48
Excellent
Wed
7 May
67
Good
Thu
8 May
58
Good
Fri
9 May
48
Excellent
Sat
10 May
27
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