Air Quality
Excellent
No health implications.
30
PM2.5
38
PM10
49
O3
0.3
CO
10
SO2
17
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
11 May
55
Good
Mon
12 May
53
Good
Tue
13 May
83
Good
Wed
14 May
62
Good
Thu
15 May
56
Good
Fri
16 May
19
Excellent
Sat
17 May
31
Excellent
Air quality in the last 12 months (Xi'an)
|
2025/02
|
70
|
102
|
71
|
53
|
44
|
43
|
47
|
45
|
49
|
60
|
71
|
69
|
47
|
55
|
82
|
75
|
45
|
37
|
44
|
43
|
46
|
43
|
44
|
47
|
62
|
47
|
54
|
78
|
|||
|
2025/01
|
62
|
63
|
57
|
65
|
93
|
85
|
67
|
66
|
49
|
57
|
80
|
92
|
87
|
67
|
48
|
45
|
73
|
105
|
87
|
93
|
119
|
125
|
100
|
87
|
90
|
127
|
64
|
52
|
78
|
49
|
55
|
|
2024/12
|
55
|
39
|
32
|
31
|
33
|
34
|
44
|
47
|
69
|
67
|
38
|
53
|
55
|
53
|
34
|
39
|
44
|
44
|
58
|
69
|
55
|
49
|
45
|
58
|
62
|
41
|
38
|
42
|
59
|
85
|
77
|
|
2024/11
|
64
|
60
|
51
|
39
|
34
|
43
|
83
|
103
|
98
|
70
|
69
|
66
|
77
|
74
|
66
|
55
|
37
|
37
|
51
|
66
|
63
|
51
|
53
|
68
|
88
|
50
|
33
|
50
|
43
|
40
|
|
|
2024/10
|
28
|
32
|
45
|
41
|
48
|
50
|
32
|
49
|
54
|
49
|
34
|
48
|
61
|
44
|
30
|
36
|
59
|
58
|
34
|
41
|
45
|
48
|
39
|
50
|
64
|
48
|
39
|
53
|
72
|
61
|
69
|
|
2024/09
|
26
|
25
|
27
|
33
|
29
|
28
|
29
|
31
|
29
|
29
|
30
|
32
|
28
|
29
|
30
|
37
|
31
|
30
|
37
|
32
|
33
|
36
|
38
|
44
|
41
|
33
|
45
|
48
|
38
|
31
|
|
|
2024/08
|
39
|
37
|
35
|
32
|
28
|
34
|
39
|
35
|
35
|
38
|
30
|
22
|
34
|
29
|
31
|
32
|
35
|
28
|
23
|
25
|
21
|
24
|
28
|
36
|
43
|
29
|
32
|
25
|
33
|
29
|
28
|
|
2024/07
|
63
|
70
|
55
|
36
|
42
|
48
|
41
|
62
|
61
|
65
|
85
|
77
|
59
|
63
|
63
|
52
|
41
|
36
|
41
|
44
|
39
|
35
|
32
|
35
|
38
|
33
|
30
|
30
|
31
|
32
|
34
|
|
2024/06
|
21
|
33
|
37
|
34
|
35
|
37
|
39
|
35
|
31
|
30
|
44
|
38
|
32
|
25
|
24
|
26
|
27
|
30
|
42
|
46
|
44
|
27
|
23
|
21
|
28
|
32
|
35
|
57
|
51
|
50
|
|
|
2024/05
|
44
|
47
|
64
|
69
|
65
|
63
|
45
|
40
|
39
|
49
|
53
|
42
|
48
|
48
|
27
|
28
|
29
|
46
|
31
|
27
|
24
|
44
|
37
|
29
|
29
|
31
|
29
|
32
|
33
|
29
|
31
|
|
2024/04
|
57
|
46
|
50
|
46
|
58
|
76
|
40
|
40
|
50
|
79
|
82
|
78
|
66
|
99
|
78
|
91
|
41
|
93
|
63
|
142
|
105
|
81
|
55
|
59
|
69
|
61
|
65
|
61
|
75
|
46
|
|
|
2024/03
|
43
|
40
|
45
|
42
|
42
|
48
|
48
|
46
|
45
|
60
|
62
|
49
|
56
|
43
|
46
|
43
|
40
|
46
|
47
|
45
|
48
|
51
|
43
|
39
|
54
|
60
|
56
|
134
|
94
|
53
|
54
|
|
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