Air Quality
Excellent
No health implications.
7
PM2.5
10
PM10
72
O3
0.5
CO
5
SO2
10
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
14 Apr
53
Good
Tue
15 Apr
60
Good
Wed
16 Apr
61
Good
Thu
17 Apr
57
Good
Fri
18 Apr
62
Good
Sat
19 Apr
56
Good
Sun
20 Apr
15
Excellent
Air quality in the last 12 months (Changyi)
|
2025/02
|
110
|
136
|
73
|
42
|
58
|
57
|
45
|
31
|
36
|
53
|
60
|
62
|
63
|
53
|
66
|
42
|
27
|
31
|
35
|
39
|
42
|
43
|
44
|
30
|
83
|
63
|
75
|
104
|
|||
|
2025/01
|
34
|
32
|
30
|
56
|
95
|
98
|
64
|
69
|
60
|
60
|
90
|
98
|
62
|
53
|
32
|
44
|
40
|
53
|
71
|
142
|
95
|
129
|
97
|
98
|
140
|
72
|
42
|
76
|
80
|
40
|
65
|
|
2024/12
|
39
|
16
|
21
|
26
|
28
|
44
|
39
|
40
|
51
|
50
|
41
|
44
|
77
|
36
|
23
|
36
|
41
|
49
|
46
|
74
|
86
|
35
|
48
|
28
|
51
|
32
|
31
|
31
|
37
|
55
|
41
|
|
2024/11
|
82
|
83
|
65
|
41
|
23
|
37
|
42
|
54
|
55
|
44
|
106
|
49
|
38
|
32
|
32
|
29
|
47
|
45
|
34
|
53
|
51
|
49
|
73
|
44
|
47
|
50
|
23
|
57
|
28
|
38
|
|
|
2024/10
|
17
|
18
|
21
|
23
|
38
|
47
|
44
|
35
|
32
|
23
|
23
|
55
|
39
|
30
|
21
|
24
|
50
|
55
|
23
|
21
|
21
|
48
|
55
|
56
|
68
|
177
|
69
|
39
|
46
|
91
|
61
|
|
2024/09
|
17
|
16
|
16
|
24
|
17
|
15
|
19
|
22
|
28
|
16
|
20
|
22
|
23
|
23
|
24
|
24
|
29
|
29
|
26
|
22
|
21
|
33
|
23
|
22
|
28
|
29
|
33
|
30
|
28
|
18
|
|
|
2024/08
|
17
|
23
|
28
|
20
|
14
|
26
|
38
|
38
|
30
|
28
|
18
|
27
|
18
|
32
|
44
|
44
|
43
|
42
|
22
|
21
|
13
|
17
|
19
|
35
|
27
|
18
|
25
|
21
|
21
|
27
|
20
|
|
2024/07
|
67
|
49
|
13
|
28
|
28
|
20
|
39
|
67
|
59
|
66
|
76
|
100
|
86
|
69
|
65
|
44
|
18
|
24
|
34
|
28
|
25
|
20
|
15
|
27
|
21
|
7
|
8
|
8
|
12
|
29
|
18
|
|
2024/06
|
25
|
32
|
26
|
38
|
43
|
33
|
33
|
20
|
19
|
22
|
29
|
37
|
31
|
19
|
17
|
20
|
22
|
27
|
39
|
33
|
37
|
57
|
43
|
12
|
13
|
29
|
40
|
45
|
31
|
49
|
|
|
2024/05
|
29
|
54
|
62
|
55
|
44
|
43
|
41
|
32
|
41
|
48
|
67
|
39
|
34
|
46
|
28
|
29
|
33
|
49
|
29
|
40
|
20
|
45
|
32
|
25
|
26
|
17
|
11
|
21
|
29
|
25
|
19
|
|
2024/04
|
69
|
74
|
73
|
56
|
72
|
76
|
64
|
53
|
62
|
63
|
62
|
64
|
55
|
70
|
134
|
116
|
69
|
94
|
167
|
176
|
118
|
78
|
129
|
63
|
55
|
111
|
72
|
55
|
59
|
33
|
|
|
2024/03
|
45
|
44
|
33
|
32
|
41
|
45
|
37
|
33
|
38
|
57
|
98
|
42
|
46
|
45
|
55
|
64
|
27
|
39
|
39
|
39
|
31
|
31
|
38
|
23
|
26
|
45
|
48
|
319
|
121
|
59
|
47
|
|
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