Air Quality
Excellent
No health implications.
24
PM2.5
29
PM10
102
O3
0.8
CO
6
SO2
19
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
3 May
78
Good
Sat
4 May
78
Good
Sun
5 May
81
Good
Mon
6 May
82
Good
Tue
7 May
84
Good
Wed
8 May
85
Good
Thu
9 May
82
Good
Air quality in the last 12 months (Yanshan)
|
2024/02
|
31
|
36
|
49
|
47
|
47
|
51
|
54
|
50
|
38
|
70
|
63
|
39
|
50
|
45
|
54
|
42
|
47
|
44
|
44
|
47
|
49
|
63
|
63
|
38
|
26
|
35
|
30
|
35
|
27
|
||
|
2024/01
|
74
|
45
|
47
|
35
|
32
|
39
|
34
|
37
|
43
|
47
|
22
|
21
|
26
|
28
|
27
|
23
|
21
|
24
|
29
|
37
|
36
|
16
|
40
|
33
|
33
|
27
|
28
|
26
|
24
|
23
|
27
|
|
2023/12
|
52
|
19
|
16
|
18
|
23
|
29
|
40
|
35
|
30
|
31
|
35
|
37
|
31
|
36
|
33
|
46
|
34
|
24
|
25
|
36
|
58
|
63
|
65
|
83
|
84
|
70
|
76
|
75
|
66
|
69
|
60
|
|
2023/11
|
37
|
34
|
40
|
38
|
33
|
43
|
18
|
16
|
20
|
25
|
30
|
30
|
19
|
22
|
15
|
20
|
44
|
43
|
44
|
59
|
41
|
54
|
58
|
57
|
54
|
65
|
68
|
56
|
57
|
69
|
|
|
2023/10
|
24
|
30
|
26
|
32
|
36
|
33
|
16
|
20
|
27
|
32
|
33
|
31
|
29
|
16
|
24
|
27
|
28
|
34
|
34
|
35
|
33
|
34
|
31
|
36
|
32
|
33
|
40
|
35
|
24
|
25
|
31
|
|
2023/09
|
35
|
39
|
40
|
27
|
25
|
26
|
30
|
29
|
26
|
35
|
47
|
23
|
22
|
24
|
31
|
32
|
19
|
20
|
21
|
21
|
23
|
23
|
33
|
30
|
32
|
24
|
20
|
18
|
19
|
22
|
|
|
2023/08
|
19
|
20
|
18
|
25
|
26
|
23
|
21
|
19
|
20
|
20
|
27
|
23
|
37
|
26
|
25
|
23
|
26
|
47
|
41
|
40
|
21
|
22
|
21
|
22
|
14
|
14
|
21
|
25
|
26
|
28
|
33
|
|
2023/07
|
21
|
21
|
18
|
19
|
16
|
16
|
17
|
20
|
16
|
18
|
20
|
20
|
15
|
22
|
39
|
47
|
45
|
39
|
22
|
22
|
21
|
21
|
26
|
25
|
25
|
28
|
29
|
27
|
31
|
32
|
30
|
|
2023/06
|
44
|
42
|
32
|
28
|
28
|
27
|
25
|
27
|
34
|
37
|
42
|
42
|
29
|
27
|
21
|
24
|
30
|
31
|
25
|
23
|
24
|
20
|
19
|
23
|
33
|
31
|
23
|
20
|
20
|
19
|
|
|
2023/05
|
31
|
37
|
34
|
36
|
36
|
42
|
45
|
34
|
23
|
28
|
25
|
27
|
36
|
39
|
32
|
28
|
43
|
46
|
45
|
56
|
53
|
47
|
49
|
53
|
38
|
30
|
31
|
31
|
29
|
32
|
34
|
|
2023/04
|
59
|
76
|
63
|
54
|
52
|
64
|
117
|
42
|
42
|
72
|
72
|
85
|
105
|
119
|
64
|
70
|
104
|
90
|
93
|
102
|
108
|
98
|
88
|
96
|
59
|
36
|
42
|
53
|
42
|
32
|
|
|
2023/03
|
106
|
85
|
63
|
44
|
49
|
81
|
81
|
71
|
57
|
76
|
82
|
36
|
30
|
45
|
63
|
47
|
45
|
63
|
60
|
58
|
39
|
39
|
44
|
54
|
90
|
80
|
48
|
29
|
38
|
41
|
43
|
|
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