Air Quality
Excellent
No health implications.
9
PM2.5
18
PM10
21
O3
0.7
CO
7
SO2
20
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
20 May
51
Good
Wed
21 May
52
Good
Thu
22 May
56
Good
Fri
23 May
57
Good
Sat
24 May
57
Good
Sun
25 May
41
Excellent
Mon
26 May
49
Excellent
Air quality in the last 12 months (Longmen)
|
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
|
|
|
2024/08
|
23
|
31
|
33
|
40
|
36
|
34
|
34
|
48
|
40
|
32
|
34
|
29
|
18
|
24
|
21
|
25
|
17
|
17
|
18
|
27
|
11
|
20
|
23
|
24
|
25
|
30
|
45
|
39
|
29
|
28
|
20
|
|
2024/07
|
21
|
19
|
22
|
21
|
23
|
19
|
18
|
21
|
24
|
19
|
18
|
17
|
17
|
20
|
15
|
17
|
14
|
16
|
18
|
18
|
18
|
20
|
26
|
37
|
36
|
27
|
20
|
10
|
12
|
14
|
14
|
|
2024/06
|
10
|
12
|
22
|
12
|
14
|
11
|
18
|
13
|
15
|
17
|
21
|
27
|
23
|
23
|
32
|
20
|
29
|
20
|
24
|
20
|
24
|
38
|
23
|
14
|
16
|
20
|
17
|
19
|
19
|
22
|
|
|
2024/05
|
16
|
20
|
24
|
23
|
18
|
37
|
27
|
29
|
40
|
42
|
36
|
22
|
31
|
37
|
37
|
40
|
47
|
32
|
28
|
13
|
7
|
12
|
16
|
13
|
17
|
21
|
21
|
17
|
20
|
25
|
18
|
|
2024/04
|
49
|
56
|
31
|
23
|
16
|
17
|
12
|
15
|
20
|
29
|
46
|
56
|
60
|
37
|
44
|
44
|
27
|
19
|
20
|
18
|
12
|
27
|
25
|
22
|
15
|
20
|
22
|
12
|
21
|
21
|
|
|
2024/03
|
17
|
18
|
25
|
36
|
40
|
24
|
27
|
33
|
38
|
9
|
12
|
21
|
43
|
47
|
21
|
37
|
44
|
49
|
22
|
63
|
53
|
50
|
39
|
34
|
28
|
29
|
35
|
37
|
41
|
42
|
33
|
|
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