Air Quality
Excellent
No health implications.
4
PM2.5
18
PM10
51
O3
0.6
CO
5
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
15 May
57
Good
Sat
16 May
53
Good
Sun
17 May
56
Good
Mon
18 May
51
Good
Tue
19 May
56
Good
Wed
20 May
46
Excellent
Thu
21 May
50
Excellent
Air quality in the last 12 months (Xihu)
|
2026/04
|
40
|
57
|
25
|
41
|
60
|
40
|
61
|
42
|
41
|
33
|
42
|
32
|
43
|
28
|
37
|
33
|
36
|
51
|
66
|
65
|
21
|
13
|
21
|
29
|
44
|
55
|
62
|
41
|
28
|
34
|
|
|
2026/03
|
13
|
20
|
43
|
71
|
72
|
63
|
79
|
61
|
72
|
69
|
77
|
53
|
53
|
72
|
122
|
63
|
32
|
13
|
61
|
55
|
64
|
46
|
26
|
46
|
67
|
34
|
37
|
51
|
62
|
33
|
34
|
|
2026/02
|
40
|
53
|
67
|
67
|
75
|
65
|
41
|
58
|
58
|
70
|
73
|
101
|
59
|
48
|
49
|
33
|
76
|
66
|
72
|
46
|
47
|
78
|
95
|
21
|
33
|
23
|
18
|
43
|
|||
|
2026/01
|
27
|
46
|
70
|
65
|
59
|
63
|
51
|
60
|
70
|
78
|
77
|
75
|
104
|
104
|
102
|
107
|
132
|
189
|
83
|
33
|
60
|
70
|
86
|
103
|
94
|
91
|
64
|
54
|
69
|
39
|
23
|
|
2025/12
|
80
|
130
|
79
|
83
|
65
|
94
|
88
|
100
|
107
|
113
|
117
|
107
|
41
|
50
|
59
|
72
|
95
|
184
|
171
|
146
|
83
|
46
|
43
|
36
|
69
|
72
|
83
|
86
|
97
|
116
|
121
|
|
2025/11
|
46
|
57
|
84
|
55
|
31
|
45
|
43
|
24
|
21
|
55
|
57
|
41
|
46
|
58
|
77
|
74
|
79
|
26
|
30
|
48
|
53
|
66
|
71
|
60
|
83
|
77
|
86
|
83
|
89
|
89
|
|
|
2025/10
|
34
|
40
|
47
|
45
|
45
|
27
|
37
|
71
|
61
|
46
|
61
|
68
|
66
|
53
|
58
|
52
|
54
|
36
|
14
|
28
|
34
|
36
|
40
|
44
|
66
|
65
|
79
|
96
|
67
|
95
|
49
|
|
2025/09
|
22
|
35
|
32
|
38
|
37
|
31
|
37
|
32
|
18
|
19
|
21
|
26
|
24
|
21
|
26
|
39
|
41
|
33
|
42
|
25
|
39
|
37
|
42
|
18
|
21
|
26
|
38
|
47
|
48
|
48
|
|
|
2025/08
|
34
|
43
|
31
|
16
|
15
|
10
|
13
|
21
|
25
|
33
|
37
|
26
|
29
|
22
|
14
|
19
|
27
|
21
|
17
|
14
|
19
|
25
|
25
|
31
|
24
|
24
|
22
|
21
|
33
|
30
|
19
|
|
2025/07
|
16
|
31
|
32
|
35
|
27
|
33
|
36
|
39
|
23
|
18
|
26
|
23
|
16
|
28
|
37
|
33
|
40
|
33
|
27
|
13
|
9
|
13
|
14
|
16
|
23
|
24
|
16
|
23
|
18
|
26
|
18
|
|
2025/06
|
33
|
11
|
26
|
30
|
32
|
28
|
27
|
17
|
20
|
27
|
17
|
17
|
36
|
22
|
10
|
30
|
19
|
10
|
14
|
15
|
17
|
11
|
10
|
15
|
30
|
30
|
24
|
21
|
18
|
20
|
|
|
2025/05
|
60
|
54
|
61
|
56
|
22
|
46
|
96
|
34
|
30
|
49
|
42
|
48
|
49
|
47
|
71
|
30
|
28
|
40
|
28
|
16
|
17
|
23
|
28
|
56
|
53
|
67
|
66
|
39
|
24
|
35
|
18
|
|
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