Air Quality
Excellent
No health implications.
9
PM2.5
19
PM10
85
O3
0.8
CO
5
SO2
21
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 May
48
Excellent
Sun
18 May
58
Good
Mon
19 May
57
Good
Tue
20 May
68
Good
Wed
21 May
70
Good
Thu
22 May
73
Good
Fri
23 May
44
Excellent
Air quality in the last 12 months (Xihu)
|
2025/02
|
90
|
131
|
52
|
50
|
55
|
66
|
52
|
61
|
76
|
64
|
58
|
72
|
104
|
83
|
100
|
58
|
37
|
35
|
52
|
52
|
55
|
56
|
54
|
57
|
80
|
72
|
92
|
106
|
|||
|
2025/01
|
56
|
64
|
65
|
62
|
113
|
118
|
68
|
50
|
55
|
90
|
116
|
127
|
97
|
77
|
51
|
58
|
64
|
58
|
89
|
91
|
71
|
76
|
83
|
77
|
92
|
82
|
137
|
66
|
128
|
116
|
70
|
|
2024/12
|
50
|
26
|
41
|
42
|
51
|
41
|
45
|
65
|
77
|
102
|
53
|
73
|
78
|
63
|
46
|
56
|
44
|
48
|
87
|
87
|
59
|
63
|
74
|
69
|
79
|
59
|
54
|
59
|
63
|
69
|
48
|
|
2024/11
|
84
|
88
|
69
|
34
|
45
|
40
|
58
|
61
|
52
|
47
|
49
|
55
|
52
|
45
|
47
|
28
|
18
|
26
|
50
|
87
|
73
|
49
|
63
|
64
|
47
|
25
|
32
|
41
|
60
|
67
|
|
|
2024/10
|
22
|
44
|
49
|
47
|
47
|
70
|
36
|
56
|
52
|
35
|
49
|
71
|
66
|
41
|
18
|
58
|
74
|
61
|
23
|
34
|
27
|
40
|
53
|
58
|
71
|
105
|
49
|
50
|
72
|
83
|
82
|
|
2024/09
|
35
|
15
|
42
|
37
|
20
|
30
|
45
|
41
|
41
|
27
|
29
|
43
|
40
|
26
|
23
|
43
|
50
|
43
|
50
|
22
|
16
|
30
|
51
|
42
|
38
|
30
|
49
|
54
|
45
|
18
|
|
|
2024/08
|
21
|
31
|
42
|
25
|
17
|
25
|
30
|
44
|
62
|
31
|
35
|
47
|
45
|
47
|
52
|
52
|
56
|
44
|
27
|
33
|
29
|
21
|
27
|
42
|
52
|
36
|
32
|
42
|
47
|
46
|
35
|
|
2024/07
|
33
|
44
|
21
|
41
|
55
|
23
|
33
|
36
|
44
|
53
|
60
|
58
|
48
|
53
|
54
|
28
|
21
|
38
|
38
|
18
|
35
|
19
|
26
|
24
|
18
|
13
|
13
|
11
|
30
|
40
|
16
|
|
2024/06
|
37
|
36
|
34
|
58
|
40
|
34
|
38
|
25
|
30
|
44
|
54
|
32
|
28
|
26
|
33
|
41
|
58
|
62
|
38
|
39
|
52
|
30
|
56
|
23
|
31
|
43
|
42
|
34
|
26
|
38
|
|
|
2024/05
|
53
|
59
|
68
|
61
|
45
|
27
|
43
|
56
|
89
|
71
|
91
|
57
|
54
|
60
|
49
|
46
|
58
|
49
|
27
|
22
|
38
|
32
|
19
|
24
|
40
|
19
|
16
|
41
|
56
|
40
|
26
|
|
2024/04
|
68
|
90
|
53
|
73
|
100
|
86
|
94
|
108
|
143
|
105
|
54
|
42
|
33
|
28
|
90
|
150
|
99
|
71
|
65
|
109
|
116
|
49
|
43
|
30
|
45
|
52
|
78
|
30
|
42
|
45
|
|
|
2024/03
|
46
|
59
|
58
|
59
|
50
|
35
|
70
|
51
|
61
|
68
|
62
|
73
|
82
|
97
|
98
|
92
|
83
|
74
|
50
|
48
|
58
|
31
|
91
|
85
|
82
|
111
|
61
|
172
|
97
|
71
|
83
|
|
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