Air Quality
Excellent
No health implications.
28
PM2.5
38
PM10
112
O3
0.3
CO
4
SO2
13
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
6 May
62
Good
Wed
7 May
86
Good
Thu
8 May
80
Good
Fri
9 May
45
Excellent
Sat
10 May
64
Good
Sun
11 May
88
Good
Mon
12 May
29
Excellent
Air quality in the last 12 months (Changli)
|
2025/02
|
59
|
85
|
32
|
23
|
26
|
51
|
24
|
25
|
40
|
73
|
101
|
53
|
76
|
87
|
111
|
49
|
29
|
43
|
47
|
42
|
39
|
40
|
32
|
59
|
68
|
72
|
131
|
191
|
|||
|
2025/01
|
56
|
33
|
41
|
86
|
93
|
38
|
23
|
20
|
21
|
35
|
49
|
51
|
61
|
39
|
32
|
51
|
67
|
89
|
66
|
68
|
63
|
51
|
61
|
84
|
100
|
102
|
26
|
50
|
80
|
40
|
37
|
|
2024/12
|
82
|
31
|
48
|
28
|
41
|
30
|
30
|
31
|
55
|
51
|
33
|
72
|
50
|
29
|
44
|
47
|
30
|
35
|
55
|
59
|
35
|
41
|
44
|
65
|
101
|
31
|
27
|
37
|
72
|
82
|
44
|
|
2024/11
|
93
|
49
|
78
|
30
|
47
|
41
|
65
|
76
|
85
|
91
|
44
|
55
|
49
|
42
|
46
|
51
|
28
|
29
|
47
|
74
|
45
|
36
|
36
|
70
|
58
|
18
|
21
|
29
|
36
|
48
|
|
|
2024/10
|
18
|
19
|
37
|
56
|
70
|
60
|
27
|
39
|
57
|
44
|
60
|
65
|
62
|
70
|
68
|
30
|
53
|
37
|
23
|
23
|
42
|
37
|
47
|
111
|
106
|
82
|
59
|
63
|
86
|
53
|
88
|
|
2024/09
|
24
|
20
|
31
|
41
|
24
|
26
|
37
|
48
|
51
|
19
|
25
|
27
|
38
|
28
|
26
|
50
|
50
|
30
|
34
|
24
|
18
|
24
|
37
|
54
|
53
|
32
|
41
|
45
|
39
|
19
|
|
|
2024/08
|
38
|
42
|
52
|
28
|
30
|
44
|
40
|
49
|
39
|
35
|
63
|
47
|
24
|
24
|
32
|
47
|
51
|
34
|
19
|
14
|
26
|
37
|
25
|
26
|
41
|
21
|
28
|
33
|
47
|
56
|
37
|
|
2024/07
|
45
|
51
|
40
|
52
|
67
|
39
|
38
|
42
|
58
|
60
|
69
|
63
|
57
|
58
|
43
|
33
|
37
|
50
|
55
|
47
|
47
|
36
|
49
|
52
|
26
|
22
|
22
|
30
|
42
|
36
|
44
|
|
2024/06
|
53
|
53
|
54
|
51
|
49
|
55
|
50
|
47
|
61
|
59
|
67
|
55
|
47
|
36
|
24
|
47
|
61
|
62
|
50
|
35
|
35
|
64
|
113
|
37
|
43
|
59
|
59
|
46
|
33
|
44
|
|
|
2024/05
|
58
|
66
|
73
|
55
|
51
|
71
|
67
|
76
|
83
|
85
|
245
|
43
|
63
|
73
|
43
|
56
|
66
|
59
|
40
|
28
|
53
|
62
|
54
|
27
|
29
|
35
|
39
|
53
|
57
|
58
|
36
|
|
2024/04
|
65
|
61
|
49
|
50
|
67
|
91
|
98
|
108
|
59
|
79
|
117
|
88
|
47
|
36
|
119
|
63
|
70
|
84
|
62
|
73
|
64
|
58
|
26
|
35
|
81
|
78
|
62
|
47
|
34
|
45
|
|
|
2024/03
|
34
|
59
|
47
|
53
|
63
|
51
|
69
|
35
|
55
|
91
|
135
|
79
|
97
|
135
|
87
|
105
|
52
|
61
|
64
|
38
|
64
|
58
|
56
|
50
|
48
|
75
|
79
|
206
|
94
|
78
|
60
|
|
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