Air Quality
Excellent
No health implications.
16
PM2.5
27
PM10
72
O3
0.6
CO
6
SO2
3
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
18 Jul
42
Excellent
Sat
19 Jul
58
Good
Sun
20 Jul
42
Excellent
Mon
21 Jul
43
Excellent
Tue
22 Jul
48
Excellent
Wed
23 Jul
55
Good
Thu
24 Jul
20
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