Air Quality
Excellent
No health implications.
28
PM2.5
34
PM10
80
O3
0.2
CO
2
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
9 May
53
Good
Sat
10 May
68
Good
Sun
11 May
84
Good
Mon
12 May
103
Light
Tue
13 May
116
Light
Wed
14 May
92
Good
Thu
15 May
38
Excellent
Air quality in the last 12 months (Chang'an)
|
2025/02
|
99
|
155
|
50
|
37
|
31
|
104
|
33
|
26
|
50
|
84
|
111
|
100
|
51
|
70
|
66
|
43
|
50
|
53
|
63
|
75
|
80
|
67
|
35
|
55
|
66
|
74
|
98
|
138
|
|||
|
2025/01
|
77
|
60
|
67
|
83
|
76
|
31
|
36
|
48
|
36
|
42
|
59
|
54
|
71
|
67
|
42
|
54
|
79
|
104
|
67
|
89
|
90
|
73
|
78
|
85
|
126
|
76
|
28
|
71
|
216
|
99
|
94
|
|
2024/12
|
59
|
38
|
61
|
88
|
46
|
46
|
30
|
32
|
66
|
84
|
74
|
82
|
73
|
49
|
45
|
49
|
53
|
43
|
57
|
65
|
31
|
44
|
58
|
88
|
110
|
68
|
56
|
49
|
61
|
78
|
82
|
|
2024/11
|
77
|
72
|
103
|
31
|
46
|
72
|
121
|
193
|
204
|
215
|
144
|
187
|
158
|
76
|
67
|
72
|
57
|
47
|
59
|
58
|
53
|
58
|
84
|
121
|
74
|
29
|
38
|
33
|
41
|
57
|
|
|
2024/10
|
45
|
32
|
45
|
58
|
83
|
126
|
96
|
94
|
92
|
93
|
74
|
131
|
183
|
181
|
130
|
63
|
94
|
64
|
29
|
31
|
57
|
55
|
55
|
90
|
152
|
205
|
112
|
64
|
128
|
134
|
119
|
|
2024/09
|
55
|
30
|
35
|
59
|
37
|
33
|
49
|
53
|
76
|
38
|
31
|
41
|
46
|
53
|
57
|
60
|
67
|
60
|
51
|
39
|
21
|
31
|
44
|
63
|
93
|
131
|
136
|
127
|
119
|
29
|
|
|
2024/08
|
48
|
48
|
47
|
37
|
28
|
41
|
31
|
39
|
47
|
70
|
23
|
24
|
26
|
34
|
54
|
47
|
36
|
32
|
34
|
31
|
30
|
44
|
49
|
45
|
42
|
19
|
25
|
34
|
44
|
63
|
68
|
|
2024/07
|
51
|
53
|
68
|
71
|
81
|
54
|
65
|
51
|
59
|
69
|
70
|
73
|
47
|
86
|
92
|
49
|
55
|
49
|
57
|
48
|
53
|
44
|
65
|
60
|
34
|
45
|
42
|
40
|
41
|
32
|
40
|
|
2024/06
|
49
|
57
|
48
|
70
|
48
|
71
|
81
|
66
|
59
|
56
|
65
|
71
|
97
|
63
|
52
|
59
|
62
|
60
|
62
|
60
|
60
|
72
|
110
|
53
|
54
|
72
|
57
|
66
|
59
|
54
|
|
|
2024/05
|
50
|
60
|
63
|
70
|
61
|
55
|
59
|
70
|
74
|
60
|
141
|
56
|
69
|
92
|
42
|
59
|
72
|
76
|
87
|
51
|
62
|
72
|
76
|
54
|
53
|
52
|
39
|
55
|
70
|
56
|
48
|
|
2024/04
|
100
|
81
|
64
|
53
|
79
|
108
|
102
|
132
|
51
|
78
|
103
|
73
|
68
|
57
|
92
|
76
|
89
|
97
|
80
|
64
|
71
|
88
|
72
|
68
|
86
|
82
|
82
|
59
|
52
|
52
|
|
|
2024/03
|
60
|
63
|
82
|
71
|
82
|
100
|
78
|
38
|
72
|
104
|
80
|
77
|
82
|
98
|
111
|
84
|
61
|
93
|
70
|
75
|
92
|
105
|
106
|
88
|
53
|
80
|
116
|
335
|
209
|
85
|
90
|
|
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