Air Quality
Excellent
No health implications.
3
PM2.5
9
PM10
86
O3
0.5
CO
5
SO2
13
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
23 May
43
Excellent
Sat
24 May
70
Good
Sun
25 May
91
Good
Mon
26 May
101
Light
Tue
27 May
97
Good
Wed
28 May
85
Good
Thu
29 May
50
Excellent
Air quality in the last 12 months (Xihu)
|
2025/04
|
50
|
53
|
68
|
62
|
62
|
72
|
67
|
62
|
66
|
61
|
59
|
143
|
77
|
87
|
51
|
48
|
54
|
61
|
73
|
72
|
49
|
32
|
47
|
53
|
45
|
59
|
33
|
49
|
48
|
52
|
|
|
2025/03
|
47
|
44
|
26
|
21
|
40
|
44
|
65
|
67
|
59
|
80
|
71
|
44
|
31
|
43
|
24
|
50
|
29
|
45
|
57
|
59
|
40
|
49
|
50
|
55
|
54
|
67
|
62
|
58
|
55
|
58
|
36
|
|
2025/02
|
27
|
52
|
83
|
54
|
39
|
64
|
56
|
31
|
39
|
55
|
85
|
93
|
108
|
70
|
89
|
44
|
70
|
45
|
61
|
46
|
29
|
57
|
91
|
82
|
98
|
88
|
91
|
41
|
|||
|
2025/01
|
96
|
90
|
79
|
87
|
104
|
82
|
72
|
74
|
46
|
46
|
60
|
65
|
82
|
83
|
52
|
48
|
63
|
85
|
81
|
110
|
144
|
144
|
82
|
48
|
35
|
42
|
37
|
44
|
128
|
71
|
62
|
|
2024/12
|
56
|
57
|
111
|
60
|
61
|
90
|
150
|
38
|
55
|
45
|
29
|
76
|
85
|
85
|
54
|
53
|
54
|
82
|
40
|
53
|
83
|
61
|
70
|
62
|
92
|
145
|
65
|
59
|
60
|
81
|
76
|
|
2024/11
|
9
|
28
|
57
|
73
|
38
|
38
|
34
|
43
|
45
|
44
|
50
|
49
|
55
|
51
|
44
|
35
|
21
|
28
|
38
|
45
|
52
|
83
|
45
|
39
|
35
|
28
|
40
|
52
|
41
|
52
|
|
|
2024/10
|
19
|
20
|
28
|
29
|
31
|
15
|
14
|
28
|
39
|
51
|
69
|
63
|
33
|
49
|
46
|
36
|
34
|
32
|
19
|
35
|
50
|
33
|
48
|
41
|
42
|
20
|
11
|
49
|
53
|
44
|
35
|
|
2024/09
|
47
|
53
|
42
|
36
|
34
|
39
|
54
|
35
|
30
|
41
|
16
|
37
|
20
|
25
|
24
|
17
|
16
|
22
|
20
|
17
|
18
|
25
|
30
|
42
|
51
|
58
|
24
|
33
|
33
|
31
|
|
|
2024/08
|
19
|
19
|
40
|
37
|
32
|
36
|
45
|
36
|
38
|
43
|
37
|
26
|
23
|
29
|
30
|
42
|
30
|
40
|
25
|
21
|
15
|
22
|
37
|
43
|
42
|
48
|
47
|
25
|
25
|
30
|
41
|
|
2024/07
|
20
|
22
|
19
|
21
|
22
|
22
|
21
|
24
|
27
|
25
|
39
|
35
|
28
|
27
|
35
|
29
|
32
|
26
|
23
|
26
|
33
|
28
|
26
|
25
|
30
|
20
|
14
|
16
|
15
|
16
|
21
|
|
2024/06
|
15
|
27
|
31
|
49
|
45
|
23
|
33
|
35
|
43
|
25
|
24
|
24
|
39
|
54
|
46
|
46
|
24
|
25
|
15
|
11
|
27
|
23
|
16
|
16
|
16
|
17
|
9
|
14
|
18
|
31
|
|
|
2024/05
|
31
|
36
|
40
|
41
|
27
|
23
|
52
|
54
|
34
|
53
|
48
|
50
|
64
|
57
|
61
|
32
|
47
|
52
|
49
|
50
|
33
|
39
|
59
|
43
|
44
|
25
|
22
|
21
|
30
|
50
|
22
|
|
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