Air Quality
Excellent
No health implications.
19
PM2.5
43
PM10
154
O3
0.5
CO
5
SO2
5
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
29 Apr
90
Good
Wed
30 Apr
92
Good
Thu
1 May
102
Light
Fri
2 May
101
Light
Sat
3 May
99
Good
Sun
4 May
86
Good
Mon
5 May
29
Excellent
Air quality in the last 12 months (Xian'an)
|
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
|
|
2024/06
|
22
|
40
|
30
|
20
|
21
|
24
|
29
|
29
|
19
|
14
|
17
|
29
|
27
|
22
|
22
|
28
|
33
|
17
|
12
|
16
|
19
|
9
|
9
|
13
|
17
|
20
|
11
|
10
|
9
|
13
|
|
|
2024/05
|
37
|
30
|
30
|
22
|
31
|
27
|
39
|
43
|
44
|
42
|
41
|
101
|
78
|
58
|
62
|
55
|
54
|
50
|
59
|
45
|
38
|
16
|
19
|
26
|
26
|
29
|
20
|
26
|
29
|
66
|
50
|
|
2024/04
|
22
|
14
|
47
|
67
|
55
|
50
|
50
|
54
|
28
|
31
|
43
|
32
|
21
|
28
|
30
|
48
|
45
|
27
|
17
|
41
|
46
|
41
|
39
|
88
|
79
|
63
|
36
|
25
|
33
|
23
|
|
|
2024/03
|
43
|
37
|
28
|
22
|
66
|
61
|
47
|
63
|
63
|
60
|
61
|
56
|
52
|
38
|
54
|
69
|
61
|
50
|
57
|
86
|
56
|
50
|
30
|
40
|
22
|
28
|
36
|
43
|
34
|
34
|
31
|
|
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