Air Quality
Excellent
No health implications.
4
PM2.5
17
PM10
71
O3
0.5
CO
7
SO2
9
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 May
60
Good
Wed
20 May
57
Good
Thu
21 May
90
Good
Fri
22 May
72
Good
Sat
23 May
61
Good
Sun
24 May
105
Light
Mon
25 May
40
Excellent
Air quality in the last 12 months (Xi'an)
|
2026/04
|
82
|
107
|
92
|
38
|
38
|
32
|
29
|
51
|
52
|
52
|
43
|
59
|
44
|
53
|
53
|
55
|
49
|
44
|
71
|
96
|
63
|
39
|
42
|
64
|
56
|
36
|
31
|
32
|
33
|
41
|
|
|
2026/03
|
94
|
143
|
124
|
57
|
50
|
39
|
50
|
82
|
65
|
68
|
79
|
86
|
74
|
149
|
207
|
137
|
153
|
50
|
49
|
75
|
103
|
161
|
103
|
84
|
114
|
149
|
93
|
111
|
105
|
40
|
57
|
|
2026/02
|
88
|
76
|
71
|
136
|
136
|
41
|
60
|
55
|
62
|
76
|
71
|
101
|
122
|
94
|
52
|
79
|
134
|
47
|
42
|
52
|
67
|
130
|
54
|
50
|
62
|
65
|
80
|
51
|
|||
|
2026/01
|
79
|
80
|
95
|
100
|
69
|
63
|
62
|
73
|
73
|
62
|
47
|
46
|
31
|
51
|
51
|
85
|
59
|
61
|
41
|
58
|
59
|
45
|
52
|
64
|
80
|
72
|
65
|
66
|
81
|
88
|
89
|
|
2025/12
|
71
|
55
|
60
|
68
|
63
|
71
|
73
|
64
|
79
|
94
|
95
|
91
|
77
|
94
|
83
|
79
|
85
|
67
|
57
|
56
|
57
|
60
|
52
|
83
|
69
|
76
|
94
|
80
|
52
|
60
|
64
|
|
2025/11
|
69
|
47
|
50
|
56
|
72
|
70
|
89
|
110
|
57
|
57
|
104
|
100
|
66
|
112
|
134
|
72
|
54
|
56
|
66
|
61
|
75
|
88
|
120
|
189
|
180
|
117
|
70
|
62
|
57
|
59
|
|
|
2025/10
|
51
|
59
|
52
|
45
|
47
|
40
|
46
|
53
|
53
|
49
|
56
|
58
|
64
|
93
|
78
|
66
|
67
|
52
|
61
|
56
|
67
|
80
|
91
|
90
|
131
|
89
|
80
|
137
|
173
|
55
|
76
|
|
2025/09
|
29
|
41
|
40
|
40
|
36
|
26
|
37
|
42
|
35
|
34
|
39
|
44
|
45
|
39
|
29
|
31
|
38
|
42
|
43
|
44
|
45
|
44
|
43
|
35
|
41
|
43
|
44
|
40
|
45
|
44
|
|
|
2025/08
|
29
|
30
|
24
|
23
|
25
|
20
|
24
|
25
|
26
|
25
|
29
|
29
|
28
|
29
|
36
|
26
|
21
|
29
|
39
|
32
|
28
|
17
|
32
|
24
|
20
|
27
|
29
|
24
|
27
|
40
|
38
|
|
2025/07
|
21
|
20
|
14
|
15
|
20
|
22
|
29
|
27
|
31
|
35
|
28
|
29
|
23
|
20
|
18
|
21
|
28
|
23
|
22
|
21
|
21
|
29
|
17
|
17
|
26
|
31
|
37
|
24
|
21
|
17
|
28
|
|
2025/06
|
37
|
38
|
23
|
18
|
29
|
31
|
25
|
29
|
30
|
17
|
20
|
31
|
27
|
25
|
34
|
19
|
27
|
28
|
26
|
20
|
16
|
20
|
31
|
35
|
38
|
33
|
46
|
33
|
33
|
29
|
|
|
2025/05
|
27
|
29
|
25
|
29
|
36
|
31
|
44
|
45
|
42
|
34
|
44
|
46
|
40
|
39
|
35
|
29
|
24
|
32
|
28
|
33
|
45
|
49
|
41
|
41
|
34
|
37
|
44
|
42
|
42
|
47
|
52
|
|
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