Air Quality
Excellent
No health implications.
4
PM2.5
8
PM10
44
O3
0.5
CO
5
SO2
5
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
8 Sep
51
Good
Tue
9 Sep
54
Good
Wed
10 Sep
57
Good
Thu
11 Sep
69
Good
Fri
12 Sep
63
Good
Sat
13 Sep
60
Good
Sun
14 Sep
19
Excellent
Air quality in the last 12 months (Longmen)
|
2025/08
|
24
|
21
|
18
|
11
|
12
|
11
|
20
|
27
|
38
|
22
|
20
|
27
|
27
|
18
|
12
|
20
|
20
|
12
|
15
|
18
|
24
|
22
|
21
|
17
|
16
|
17
|
22
|
23
|
20
|
19
|
17
|
|
2025/07
|
15
|
18
|
29
|
37
|
37
|
28
|
40
|
34
|
34
|
17
|
8
|
19
|
23
|
30
|
36
|
36
|
39
|
39
|
19
|
10
|
10
|
12
|
17
|
20
|
23
|
26
|
39
|
26
|
28
|
31
|
15
|
|
2025/06
|
30
|
29
|
15
|
25
|
24
|
36
|
35
|
30
|
30
|
25
|
19
|
18
|
17
|
13
|
19
|
17
|
12
|
18
|
20
|
13
|
16
|
21
|
23
|
20
|
21
|
16
|
15
|
16
|
18
|
14
|
|
|
2025/05
|
39
|
42
|
45
|
37
|
31
|
24
|
16
|
33
|
22
|
26
|
29
|
31
|
36
|
32
|
25
|
21
|
21
|
26
|
19
|
22
|
25
|
25
|
24
|
21
|
50
|
52
|
42
|
33
|
16
|
14
|
28
|
|
2025/04
|
23
|
32
|
43
|
52
|
25
|
46
|
53
|
58
|
59
|
47
|
43
|
50
|
218
|
122
|
82
|
82
|
63
|
53
|
35
|
41
|
35
|
36
|
39
|
25
|
12
|
17
|
40
|
28
|
40
|
53
|
|
|
2025/03
|
31
|
30
|
31
|
22
|
9
|
9
|
19
|
26
|
30
|
39
|
34
|
33
|
31
|
29
|
17
|
13
|
46
|
35
|
30
|
36
|
40
|
48
|
58
|
63
|
69
|
51
|
36
|
45
|
9
|
6
|
6
|
|
2025/02
|
38
|
30
|
8
|
28
|
33
|
38
|
18
|
53
|
26
|
32
|
38
|
32
|
36
|
40
|
52
|
61
|
31
|
36
|
36
|
43
|
19
|
24
|
10
|
22
|
30
|
39
|
50
|
40
|
|||
|
2025/01
|
58
|
53
|
47
|
47
|
55
|
67
|
62
|
60
|
54
|
34
|
31
|
29
|
37
|
46
|
48
|
57
|
40
|
40
|
40
|
40
|
45
|
45
|
41
|
42
|
30
|
15
|
22
|
42
|
73
|
57
|
45
|
|
2024/12
|
39
|
41
|
37
|
37
|
50
|
64
|
44
|
31
|
47
|
35
|
46
|
18
|
30
|
62
|
37
|
37
|
37
|
35
|
56
|
52
|
40
|
57
|
64
|
58
|
56
|
61
|
62
|
69
|
63
|
72
|
57
|
|
2024/11
|
23
|
20
|
33
|
37
|
36
|
49
|
35
|
30
|
34
|
43
|
38
|
34
|
33
|
24
|
15
|
10
|
22
|
17
|
12
|
15
|
23
|
24
|
28
|
35
|
21
|
16
|
25
|
27
|
28
|
34
|
|
|
2024/10
|
25
|
23
|
30
|
27
|
28
|
31
|
35
|
50
|
31
|
27
|
32
|
43
|
44
|
40
|
40
|
32
|
35
|
31
|
30
|
26
|
24
|
32
|
23
|
29
|
35
|
37
|
28
|
12
|
21
|
37
|
30
|
|
2024/09
|
23
|
29
|
26
|
24
|
20
|
12
|
13
|
15
|
13
|
20
|
34
|
37
|
28
|
25
|
16
|
20
|
20
|
18
|
21
|
23
|
13
|
13
|
12
|
13
|
23
|
33
|
26
|
24
|
24
|
22
|
|
|
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