Air Quality
Excellent
No health implications.
29
PM2.5
42
PM10
88
O3
0.4
CO
8
SO2
14
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
14 Mar
58
Good
Sat
15 Mar
45
Excellent
Sun
16 Mar
48
Excellent
Mon
17 Mar
57
Good
Tue
18 Mar
55
Good
Wed
19 Mar
84
Good
Thu
20 Mar
32
Excellent
Air quality in the last 12 months (Changli)
|
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
|
|
2024/02
|
30
|
53
|
55
|
58
|
52
|
43
|
74
|
87
|
171
|
159
|
99
|
144
|
146
|
84
|
28
|
56
|
59
|
57
|
41
|
37
|
42
|
29
|
31
|
48
|
75
|
60
|
57
|
77
|
52
|
||
|
1
|
2
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3
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4
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5
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6
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7
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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