Air Quality
Excellent
No health implications.
4
PM2.5
7
PM10
44
O3
0.7
CO
2
SO2
11
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
24 Apr
36
Excellent
Fri
25 Apr
46
Excellent
Sat
26 Apr
49
Excellent
Sun
27 Apr
34
Excellent
Mon
28 Apr
44
Excellent
Tue
29 Apr
54
Good
Wed
30 Apr
22
Excellent
Air quality in the last 12 months (Yanshan)
|
2025/02
|
13
|
14
|
29
|
59
|
58
|
42
|
29
|
68
|
35
|
52
|
112
|
91
|
74
|
96
|
70
|
26
|
30
|
33
|
19
|
11
|
22
|
14
|
19
|
69
|
69
|
49
|
28
|
46
|
|||
|
2025/01
|
93
|
96
|
86
|
109
|
131
|
96
|
77
|
82
|
49
|
49
|
53
|
69
|
86
|
73
|
63
|
61
|
68
|
81
|
86
|
84
|
95
|
104
|
98
|
130
|
109
|
20
|
49
|
55
|
94
|
90
|
46
|
|
2024/12
|
70
|
71
|
68
|
76
|
82
|
22
|
18
|
47
|
93
|
42
|
18
|
54
|
45
|
57
|
35
|
47
|
75
|
51
|
81
|
97
|
89
|
98
|
102
|
97
|
107
|
94
|
83
|
90
|
99
|
128
|
114
|
|
2024/11
|
39
|
70
|
86
|
69
|
60
|
67
|
46
|
43
|
45
|
58
|
61
|
53
|
66
|
60
|
45
|
38
|
31
|
14
|
12
|
14
|
26
|
37
|
33
|
50
|
46
|
20
|
27
|
36
|
40
|
59
|
|
|
2024/10
|
30
|
39
|
53
|
43
|
44
|
45
|
56
|
35
|
42
|
42
|
51
|
52
|
54
|
85
|
28
|
27
|
39
|
36
|
13
|
12
|
22
|
19
|
21
|
25
|
31
|
40
|
20
|
35
|
42
|
44
|
45
|
|
2024/09
|
21
|
16
|
16
|
22
|
40
|
30
|
10
|
11
|
16
|
15
|
22
|
33
|
30
|
32
|
35
|
24
|
29
|
31
|
40
|
31
|
24
|
25
|
30
|
38
|
50
|
37
|
29
|
34
|
35
|
33
|
|
|
2024/08
|
9
|
12
|
15
|
18
|
19
|
18
|
18
|
17
|
20
|
19
|
11
|
11
|
9
|
13
|
27
|
22
|
14
|
23
|
32
|
12
|
12
|
11
|
11
|
16
|
17
|
19
|
28
|
28
|
31
|
28
|
24
|
|
2024/07
|
13
|
16
|
15
|
16
|
14
|
11
|
14
|
16
|
16
|
19
|
17
|
18
|
23
|
13
|
11
|
13
|
10
|
10
|
9
|
14
|
16
|
12
|
11
|
16
|
21
|
28
|
34
|
9
|
11
|
8
|
8
|
|
2024/06
|
13
|
11
|
31
|
13
|
8
|
14
|
19
|
26
|
24
|
24
|
10
|
17
|
10
|
15
|
10
|
9
|
10
|
9
|
10
|
15
|
15
|
13
|
16
|
9
|
10
|
12
|
9
|
12
|
13
|
7
|
|
|
2024/05
|
10
|
21
|
18
|
24
|
11
|
22
|
26
|
48
|
43
|
41
|
23
|
30
|
56
|
44
|
41
|
47
|
51
|
49
|
10
|
18
|
17
|
35
|
31
|
27
|
28
|
14
|
14
|
21
|
32
|
31
|
8
|
|
2024/04
|
45
|
61
|
49
|
12
|
11
|
11
|
10
|
17
|
31
|
41
|
56
|
55
|
43
|
48
|
53
|
53
|
28
|
17
|
21
|
14
|
15
|
22
|
30
|
38
|
42
|
20
|
18
|
31
|
44
|
15
|
|
|
2024/03
|
53
|
43
|
46
|
39
|
28
|
55
|
40
|
47
|
53
|
43
|
23
|
38
|
34
|
36
|
22
|
30
|
51
|
14
|
34
|
73
|
73
|
51
|
32
|
40
|
30
|
20
|
60
|
30
|
31
|
53
|
35
|
|
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