Air Quality
Excellent
No health implications.
7
PM2.5
15
PM10
83
O3
0.4
CO
1
SO2
7
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
30 Jun
56
Good
Tue
1 Jul
94
Good
Wed
2 Jul
115
Light
Thu
3 Jul
96
Good
Fri
4 Jul
113
Light
Sat
5 Jul
103
Light
Sun
6 Jul
22
Excellent
Air quality in the last 12 months (Chang'an)
|
2025/05
|
102
|
73
|
78
|
78
|
125
|
475
|
178
|
105
|
80
|
49
|
39
|
54
|
39
|
71
|
73
|
60
|
200
|
128
|
81
|
66
|
71
|
78
|
63
|
56
|
47
|
46
|
55
|
48
|
41
|
57
|
46
|
|
2025/04
|
87
|
99
|
99
|
124
|
110
|
97
|
75
|
91
|
117
|
117
|
132
|
328
|
136
|
89
|
67
|
119
|
138
|
123
|
105
|
72
|
72
|
163
|
103
|
70
|
94
|
72
|
49
|
51
|
56
|
125
|
|
|
2025/03
|
181
|
65
|
26
|
69
|
72
|
72
|
88
|
84
|
79
|
80
|
229
|
188
|
84
|
45
|
49
|
52
|
49
|
50
|
48
|
60
|
69
|
70
|
83
|
68
|
62
|
221
|
198
|
133
|
111
|
96
|
92
|
|
2025/02
|
222
|
151
|
36
|
48
|
50
|
51
|
102
|
48
|
63
|
93
|
124
|
85
|
74
|
87
|
67
|
84
|
103
|
111
|
127
|
124
|
143
|
167
|
81
|
80
|
81
|
83
|
101
|
105
|
|||
|
2025/01
|
120
|
88
|
113
|
121
|
91
|
90
|
93
|
79
|
83
|
82
|
63
|
90
|
102
|
82
|
55
|
67
|
119
|
95
|
94
|
126
|
202
|
237
|
228
|
156
|
64
|
85
|
79
|
109
|
321
|
280
|
236
|
|
2024/12
|
68
|
95
|
92
|
74
|
68
|
64
|
71
|
58
|
77
|
107
|
133
|
136
|
49
|
62
|
57
|
83
|
109
|
85
|
116
|
160
|
72
|
67
|
87
|
94
|
95
|
95
|
87
|
66
|
91
|
64
|
85
|
|
2024/11
|
80
|
60
|
63
|
53
|
78
|
114
|
138
|
154
|
129
|
110
|
149
|
163
|
134
|
66
|
64
|
53
|
16
|
27
|
61
|
49
|
54
|
89
|
144
|
141
|
36
|
52
|
77
|
74
|
54
|
49
|
|
|
2024/10
|
46
|
48
|
51
|
55
|
92
|
92
|
65
|
130
|
89
|
60
|
92
|
110
|
80
|
58
|
69
|
45
|
84
|
59
|
42
|
36
|
35
|
29
|
47
|
71
|
106
|
65
|
39
|
51
|
92
|
107
|
77
|
|
2024/09
|
59
|
60
|
45
|
50
|
35
|
52
|
32
|
31
|
51
|
47
|
58
|
45
|
45
|
36
|
51
|
52
|
55
|
55
|
47
|
35
|
28
|
56
|
69
|
95
|
82
|
111
|
82
|
62
|
31
|
33
|
|
|
2024/08
|
47
|
54
|
41
|
44
|
44
|
36
|
42
|
41
|
57
|
111
|
60
|
49
|
49
|
57
|
43
|
32
|
36
|
34
|
43
|
47
|
39
|
57
|
66
|
63
|
46
|
39
|
30
|
48
|
51
|
39
|
45
|
|
2024/07
|
21
|
32
|
35
|
41
|
30
|
35
|
38
|
12
|
33
|
41
|
39
|
42
|
44
|
35
|
48
|
46
|
14
|
31
|
28
|
33
|
35
|
37
|
54
|
73
|
83
|
65
|
57
|
52
|
41
|
22
|
33
|
|
2024/06
|
74
|
48
|
61
|
29
|
29
|
50
|
43
|
37
|
35
|
43
|
39
|
49
|
53
|
41
|
61
|
36
|
39
|
30
|
35
|
34
|
21
|
39
|
40
|
55
|
72
|
57
|
41
|
46
|
52
|
60
|
|
|
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