Air Quality
Excellent
No health implications.
14
PM2.5
22
PM10
44
O3
0.5
CO
6
SO2
12
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
18 Dec
50
Excellent
Fri
19 Dec
45
Excellent
Sat
20 Dec
48
Excellent
Sun
21 Dec
48
Excellent
Mon
22 Dec
41
Excellent
Tue
23 Dec
48
Excellent
Wed
24 Dec
36
Excellent
Air quality in the last 12 months (Yanshan)
|
2025/11
|
17
|
12
|
11
|
15
|
14
|
16
|
17
|
13
|
11
|
10
|
18
|
28
|
31
|
29
|
30
|
36
|
32
|
15
|
18
|
35
|
43
|
44
|
36
|
41
|
47
|
52
|
48
|
48
|
48
|
48
|
|
|
2025/10
|
11
|
14
|
18
|
18
|
22
|
18
|
10
|
13
|
15
|
21
|
28
|
32
|
33
|
25
|
14
|
12
|
18
|
23
|
28
|
27
|
17
|
17
|
23
|
26
|
14
|
16
|
19
|
20
|
25
|
24
|
29
|
|
2025/09
|
17
|
17
|
18
|
22
|
25
|
24
|
28
|
28
|
19
|
15
|
14
|
13
|
13
|
19
|
21
|
18
|
19
|
14
|
16
|
20
|
25
|
29
|
18
|
15
|
17
|
10
|
12
|
21
|
12
|
10
|
|
|
2025/08
|
21
|
31
|
23
|
22
|
28
|
34
|
16
|
16
|
17
|
21
|
19
|
23
|
27
|
42
|
27
|
13
|
13
|
26
|
19
|
16
|
15
|
15
|
15
|
18
|
21
|
13
|
15
|
13
|
16
|
18
|
19
|
|
2025/07
|
13
|
12
|
12
|
12
|
16
|
22
|
22
|
22
|
24
|
19
|
21
|
25
|
23
|
25
|
18
|
19
|
17
|
28
|
21
|
25
|
21
|
15
|
11
|
10
|
11
|
13
|
18
|
28
|
33
|
28
|
20
|
|
2025/06
|
19
|
23
|
20
|
21
|
19
|
29
|
29
|
24
|
24
|
29
|
39
|
25
|
29
|
30
|
21
|
17
|
17
|
15
|
16
|
15
|
17
|
13
|
13
|
13
|
13
|
14
|
13
|
20
|
12
|
13
|
|
|
2025/05
|
37
|
43
|
29
|
18
|
28
|
33
|
39
|
41
|
40
|
21
|
18
|
21
|
28
|
41
|
24
|
19
|
20
|
19
|
18
|
18
|
26
|
27
|
34
|
38
|
24
|
16
|
16
|
15
|
14
|
13
|
12
|
|
2025/04
|
38
|
61
|
67
|
86
|
94
|
31
|
38
|
49
|
52
|
57
|
56
|
58
|
98
|
85
|
60
|
45
|
44
|
35
|
35
|
39
|
32
|
27
|
43
|
50
|
35
|
43
|
55
|
35
|
32
|
34
|
|
|
2025/03
|
35
|
39
|
55
|
63
|
81
|
43
|
46
|
43
|
44
|
35
|
44
|
46
|
44
|
52
|
57
|
27
|
31
|
19
|
32
|
42
|
56
|
80
|
82
|
73
|
61
|
56
|
62
|
83
|
85
|
38
|
26
|
|
2025/02
|
44
|
47
|
20
|
32
|
62
|
46
|
22
|
24
|
22
|
31
|
36
|
53
|
37
|
37
|
47
|
47
|
26
|
22
|
25
|
27
|
22
|
22
|
22
|
13
|
19
|
16
|
24
|
35
|
|||
|
2025/01
|
53
|
57
|
84
|
87
|
65
|
93
|
113
|
98
|
64
|
25
|
38
|
51
|
54
|
70
|
75
|
90
|
92
|
108
|
77
|
64
|
92
|
105
|
55
|
35
|
42
|
23
|
41
|
50
|
65
|
44
|
46
|
|
2024/12
|
44
|
59
|
48
|
46
|
44
|
20
|
23
|
20
|
16
|
26
|
36
|
29
|
34
|
36
|
74
|
72
|
51
|
51
|
70
|
77
|
79
|
78
|
79
|
72
|
80
|
92
|
74
|
44
|
46
|
59
|
41
|
|
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