Air Quality
Excellent
No health implications.
10
PM2.5
15
PM10
55
O3
0.7
CO
5
SO2
4
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
11 Aug
52
Good
Tue
12 Aug
46
Excellent
Wed
13 Aug
42
Excellent
Thu
14 Aug
52
Good
Fri
15 Aug
51
Good
Sat
16 Aug
67
Good
Sun
17 Aug
23
Excellent
Air quality in the last 12 months (Xian'an)
|
2025/06
|
12
|
20
|
38
|
42
|
33
|
31
|
25
|
12
|
20
|
22
|
22
|
21
|
20
|
19
|
29
|
40
|
27
|
15
|
12
|
18
|
15
|
11
|
16
|
18
|
21
|
23
|
15
|
13
|
11
|
16
|
|
|
2025/05
|
41
|
54
|
55
|
52
|
36
|
108
|
126
|
38
|
37
|
44
|
36
|
33
|
33
|
49
|
51
|
17
|
30
|
68
|
49
|
23
|
19
|
20
|
38
|
55
|
41
|
41
|
49
|
27
|
21
|
21
|
15
|
|
2025/04
|
64
|
55
|
60
|
58
|
67
|
67
|
63
|
60
|
51
|
40
|
39
|
232
|
122
|
127
|
54
|
58
|
68
|
69
|
69
|
63
|
29
|
46
|
51
|
45
|
45
|
34
|
37
|
55
|
52
|
43
|
|
|
2025/03
|
46
|
36
|
14
|
33
|
49
|
46
|
50
|
61
|
49
|
42
|
35
|
58
|
44
|
45
|
29
|
49
|
30
|
40
|
44
|
40
|
40
|
47
|
54
|
51
|
51
|
58
|
79
|
61
|
62
|
69
|
72
|
|
2025/02
|
62
|
47
|
59
|
58
|
45
|
46
|
79
|
42
|
37
|
39
|
46
|
76
|
86
|
53
|
62
|
58
|
44
|
29
|
35
|
55
|
58
|
30
|
72
|
93
|
82
|
53
|
34
|
40
|
|||
|
2025/01
|
77
|
106
|
162
|
143
|
104
|
68
|
79
|
68
|
57
|
48
|
58
|
66
|
56
|
81
|
68
|
57
|
61
|
65
|
67
|
76
|
73
|
73
|
183
|
139
|
27
|
35
|
54
|
60
|
85
|
54
|
74
|
|
2024/12
|
43
|
51
|
95
|
92
|
48
|
49
|
52
|
98
|
60
|
61
|
74
|
82
|
79
|
56
|
53
|
46
|
53
|
76
|
58
|
72
|
86
|
59
|
68
|
71
|
80
|
118
|
138
|
54
|
44
|
70
|
97
|
|
2024/11
|
52
|
86
|
66
|
71
|
65
|
40
|
34
|
36
|
45
|
53
|
46
|
40
|
50
|
60
|
73
|
75
|
17
|
19
|
33
|
33
|
36
|
38
|
61
|
51
|
33
|
32
|
45
|
55
|
48
|
39
|
|
|
2024/10
|
19
|
47
|
45
|
34
|
41
|
71
|
27
|
31
|
42
|
59
|
61
|
55
|
86
|
58
|
54
|
33
|
19
|
23
|
19
|
26
|
45
|
26
|
31
|
36
|
49
|
48
|
37
|
60
|
55
|
45
|
44
|
|
2024/09
|
38
|
45
|
43
|
38
|
44
|
55
|
44
|
40
|
43
|
37
|
40
|
38
|
30
|
39
|
39
|
29
|
47
|
41
|
35
|
41
|
33
|
30
|
36
|
42
|
45
|
53
|
51
|
29
|
33
|
45
|
|
|
2024/08
|
13
|
16
|
23
|
22
|
26
|
23
|
24
|
23
|
22
|
24
|
76
|
81
|
45
|
24
|
24
|
30
|
43
|
40
|
28
|
34
|
34
|
32
|
24
|
22
|
23
|
33
|
27
|
21
|
40
|
36
|
37
|
|
2024/07
|
11
|
21
|
19
|
14
|
16
|
16
|
17
|
18
|
22
|
31
|
32
|
24
|
23
|
33
|
26
|
23
|
15
|
15
|
12
|
16
|
18
|
18
|
24
|
30
|
38
|
27
|
18
|
11
|
11
|
17
|
17
|
|
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