Air Quality
Excellent
No health implications.
17
PM2.5
30
PM10
160
O3
0.5
CO
8
SO2
8
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
16 Jul
70
Good
Thu
17 Jul
59
Good
Fri
18 Jul
49
Excellent
Sat
19 Jul
58
Good
Sun
20 Jul
46
Excellent
Mon
21 Jul
50
Excellent
Tue
22 Jul
22
Excellent
Air quality in the last 12 months (Chengkou)
|
2025/06
|
15
|
23
|
36
|
40
|
36
|
40
|
23
|
22
|
27
|
38
|
36
|
40
|
38
|
28
|
40
|
50
|
37
|
30
|
15
|
25
|
19
|
22
|
24
|
25
|
20
|
15
|
22
|
25
|
16
|
20
|
|
|
2025/05
|
55
|
62
|
62
|
42
|
39
|
57
|
49
|
51
|
53
|
60
|
54
|
53
|
48
|
38
|
56
|
52
|
65
|
54
|
61
|
60
|
56
|
39
|
43
|
50
|
50
|
45
|
40
|
31
|
35
|
41
|
26
|
|
2025/04
|
46
|
60
|
61
|
53
|
60
|
63
|
56
|
55
|
55
|
42
|
41
|
336
|
200
|
105
|
67
|
66
|
64
|
64
|
65
|
45
|
42
|
70
|
68
|
54
|
56
|
53
|
46
|
43
|
43
|
38
|
|
|
2025/03
|
68
|
63
|
20
|
14
|
21
|
34
|
45
|
54
|
57
|
47
|
43
|
54
|
41
|
39
|
24
|
34
|
42
|
44
|
47
|
47
|
52
|
59
|
64
|
56
|
48
|
44
|
125
|
45
|
41
|
51
|
46
|
|
2025/02
|
48
|
35
|
38
|
42
|
47
|
33
|
45
|
55
|
57
|
56
|
67
|
63
|
57
|
52
|
47
|
44
|
51
|
46
|
65
|
79
|
78
|
51
|
40
|
71
|
70
|
57
|
53
|
62
|
|||
|
2025/01
|
110
|
113
|
129
|
153
|
84
|
78
|
84
|
63
|
58
|
65
|
70
|
63
|
67
|
85
|
59
|
60
|
77
|
87
|
89
|
93
|
104
|
147
|
191
|
76
|
17
|
43
|
61
|
65
|
128
|
96
|
90
|
|
2024/12
|
66
|
76
|
89
|
62
|
42
|
41
|
46
|
53
|
63
|
62
|
51
|
57
|
50
|
51
|
65
|
79
|
90
|
88
|
77
|
108
|
125
|
97
|
64
|
89
|
111
|
127
|
112
|
69
|
89
|
116
|
114
|
|
2024/11
|
47
|
38
|
40
|
40
|
31
|
39
|
50
|
63
|
49
|
40
|
52
|
50
|
38
|
30
|
36
|
27
|
10
|
12
|
17
|
21
|
27
|
33
|
43
|
42
|
20
|
41
|
46
|
48
|
54
|
58
|
|
|
2024/10
|
24
|
31
|
41
|
45
|
48
|
42
|
36
|
36
|
43
|
43
|
42
|
34
|
35
|
40
|
39
|
49
|
38
|
22
|
24
|
15
|
17
|
27
|
31
|
46
|
46
|
47
|
44
|
40
|
45
|
60
|
52
|
|
2024/09
|
35
|
38
|
27
|
31
|
39
|
35
|
42
|
41
|
42
|
29
|
44
|
31
|
28
|
32
|
26
|
21
|
22
|
26
|
33
|
29
|
14
|
22
|
31
|
37
|
46
|
67
|
59
|
80
|
60
|
16
|
|
|
2024/08
|
25
|
26
|
20
|
12
|
15
|
20
|
19
|
24
|
24
|
27
|
61
|
48
|
32
|
26
|
28
|
43
|
34
|
23
|
30
|
27
|
31
|
37
|
39
|
40
|
28
|
31
|
25
|
22
|
24
|
32
|
36
|
|
2024/07
|
20
|
21
|
25
|
19
|
15
|
15
|
24
|
16
|
14
|
28
|
14
|
13
|
20
|
10
|
16
|
22
|
23
|
20
|
21
|
20
|
23
|
22
|
27
|
28
|
41
|
34
|
29
|
31
|
19
|
10
|
15
|
|
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