Air Quality
Excellent
No health implications.
12
PM2.5
20
PM10
33
O3
0.4
CO
6
SO2
16
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
16 May
65
Good
Sat
17 May
60
Good
Sun
18 May
58
Good
Mon
19 May
61
Good
Tue
20 May
54
Good
Wed
21 May
16
Excellent
Thu
22 May
48
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