Air Quality
Excellent
No health implications.
30
PM2.5
42
PM10
3
O3
1.0
CO
6
SO2
29
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
27 Apr
41
Excellent
Sun
28 Apr
39
Excellent
Mon
29 Apr
42
Excellent
Tue
30 Apr
41
Excellent
Wed
1 May
39
Excellent
Thu
2 May
46
Excellent
Air quality in the last 12 months (Yanshan)
|
2024/02
|
42
|
15
|
13
|
12
|
20
|
17
|
20
|
32
|
54
|
88
|
68
|
58
|
45
|
40
|
37
|
28
|
58
|
33
|
38
|
42
|
29
|
15
|
18
|
18
|
19
|
17
|
29
|
20
|
24
|
||
|
2024/01
|
116
|
28
|
37
|
51
|
77
|
82
|
67
|
23
|
28
|
63
|
67
|
77
|
78
|
70
|
88
|
125
|
103
|
92
|
27
|
14
|
25
|
26
|
40
|
36
|
37
|
47
|
46
|
64
|
43
|
27
|
34
|
|
2023/12
|
72
|
56
|
17
|
20
|
22
|
37
|
48
|
50
|
78
|
59
|
26
|
17
|
56
|
75
|
33
|
25
|
30
|
14
|
23
|
47
|
43
|
49
|
43
|
49
|
63
|
75
|
78
|
78
|
81
|
118
|
134
|
|
2023/11
|
50
|
54
|
58
|
43
|
37
|
22
|
21
|
38
|
49
|
18
|
16
|
15
|
18
|
22
|
36
|
33
|
42
|
43
|
46
|
43
|
55
|
59
|
68
|
68
|
69
|
76
|
77
|
59
|
63
|
82
|
|
|
2023/10
|
49
|
41
|
32
|
43
|
24
|
33
|
32
|
29
|
28
|
26
|
30
|
42
|
57
|
64
|
44
|
49
|
54
|
48
|
25
|
25
|
32
|
41
|
47
|
46
|
38
|
42
|
18
|
28
|
37
|
42
|
41
|
|
2023/09
|
34
|
37
|
32
|
23
|
39
|
33
|
24
|
19
|
17
|
16
|
16
|
17
|
20
|
22
|
21
|
24
|
24
|
21
|
22
|
23
|
29
|
22
|
29
|
38
|
37
|
37
|
39
|
33
|
34
|
29
|
|
|
2023/08
|
21
|
19
|
23
|
31
|
20
|
18
|
18
|
16
|
20
|
28
|
25
|
28
|
31
|
29
|
21
|
23
|
28
|
27
|
40
|
29
|
23
|
30
|
34
|
27
|
20
|
24
|
26
|
23
|
27
|
40
|
39
|
|
2023/07
|
26
|
26
|
21
|
18
|
17
|
23
|
20
|
24
|
23
|
22
|
24
|
26
|
27
|
27
|
27
|
42
|
44
|
23
|
21
|
16
|
21
|
26
|
29
|
31
|
30
|
35
|
31
|
25
|
30
|
23
|
21
|
|
2023/06
|
39
|
36
|
46
|
35
|
27
|
34
|
31
|
21
|
21
|
33
|
39
|
36
|
29
|
30
|
38
|
37
|
18
|
18
|
19
|
18
|
20
|
20
|
18
|
20
|
17
|
15
|
16
|
20
|
20
|
22
|
|
|
2023/05
|
62
|
35
|
25
|
22
|
33
|
38
|
22
|
31
|
43
|
29
|
26
|
32
|
48
|
46
|
44
|
39
|
37
|
36
|
41
|
38
|
40
|
31
|
35
|
27
|
33
|
24
|
17
|
22
|
31
|
37
|
39
|
|
2023/04
|
45
|
27
|
26
|
40
|
24
|
28
|
41
|
62
|
63
|
49
|
47
|
39
|
59
|
39
|
65
|
67
|
62
|
54
|
47
|
35
|
37
|
32
|
13
|
18
|
19
|
28
|
38
|
50
|
58
|
98
|
|
|
2023/03
|
89
|
87
|
118
|
80
|
67
|
79
|
99
|
107
|
82
|
73
|
86
|
100
|
103
|
85
|
87
|
117
|
53
|
33
|
30
|
39
|
61
|
62
|
24
|
17
|
17
|
44
|
31
|
44
|
47
|
43
|
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