Air Quality
Excellent
No health implications.
15
PM2.5
22
PM10
101
O3
0.5
CO
4
SO2
7
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
15 Jul
56
Good
Wed
16 Jul
59
Good
Thu
17 Jul
66
Good
Fri
18 Jul
66
Good
Sat
19 Jul
53
Good
Sun
20 Jul
55
Good
Mon
21 Jul
39
Excellent
Changtai Air quality rank
Air quality in the last 12 months (Changtai)
|
2025/06
|
39
|
25
|
13
|
24
|
32
|
35
|
34
|
41
|
23
|
26
|
32
|
26
|
19
|
17
|
15
|
21
|
21
|
26
|
17
|
14
|
15
|
19
|
21
|
26
|
20
|
14
|
17
|
17
|
18
|
23
|
|
|
2025/05
|
62
|
49
|
48
|
51
|
36
|
36
|
36
|
62
|
40
|
26
|
27
|
38
|
45
|
42
|
33
|
18
|
18
|
26
|
27
|
29
|
26
|
33
|
30
|
19
|
43
|
46
|
38
|
36
|
11
|
22
|
45
|
|
2025/04
|
19
|
39
|
48
|
59
|
49
|
50
|
56
|
62
|
77
|
42
|
45
|
42
|
120
|
83
|
86
|
70
|
59
|
57
|
50
|
45
|
48
|
38
|
32
|
33
|
22
|
14
|
33
|
39
|
37
|
47
|
|
|
2025/03
|
64
|
32
|
31
|
32
|
13
|
13
|
22
|
34
|
39
|
43
|
54
|
54
|
32
|
37
|
39
|
8
|
45
|
48
|
45
|
48
|
52
|
53
|
62
|
71
|
81
|
60
|
48
|
54
|
20
|
11
|
11
|
|
2025/02
|
48
|
22
|
14
|
31
|
58
|
58
|
15
|
40
|
41
|
39
|
42
|
56
|
43
|
35
|
42
|
65
|
49
|
59
|
31
|
36
|
23
|
21
|
20
|
33
|
47
|
65
|
73
|
66
|
|||
|
2025/01
|
64
|
63
|
59
|
45
|
52
|
58
|
62
|
60
|
59
|
60
|
45
|
46
|
56
|
54
|
73
|
86
|
65
|
53
|
54
|
52
|
60
|
64
|
57
|
37
|
29
|
25
|
19
|
36
|
120
|
40
|
36
|
|
2024/12
|
56
|
63
|
43
|
38
|
44
|
44
|
39
|
28
|
31
|
35
|
42
|
25
|
21
|
38
|
57
|
58
|
55
|
54
|
51
|
40
|
46
|
62
|
61
|
38
|
44
|
53
|
62
|
68
|
64
|
57
|
66
|
|
2024/11
|
14
|
16
|
33
|
44
|
43
|
37
|
26
|
26
|
44
|
44
|
34
|
26
|
20
|
33
|
35
|
24
|
27
|
17
|
14
|
9
|
12
|
20
|
26
|
28
|
24
|
15
|
27
|
25
|
36
|
48
|
|
|
2024/10
|
12
|
10
|
16
|
17
|
18
|
23
|
22
|
15
|
26
|
36
|
46
|
41
|
34
|
38
|
33
|
28
|
32
|
44
|
40
|
18
|
27
|
31
|
33
|
32
|
30
|
28
|
38
|
20
|
30
|
40
|
16
|
|
2024/09
|
33
|
40
|
41
|
30
|
25
|
14
|
14
|
20
|
17
|
35
|
47
|
52
|
26
|
30
|
22
|
23
|
24
|
21
|
30
|
19
|
22
|
9
|
10
|
14
|
19
|
27
|
23
|
16
|
21
|
15
|
|
|
2024/08
|
25
|
28
|
36
|
43
|
39
|
39
|
31
|
26
|
30
|
44
|
41
|
34
|
25
|
25
|
21
|
19
|
21
|
20
|
18
|
13
|
16
|
24
|
27
|
31
|
40
|
46
|
36
|
30
|
39
|
31
|
32
|
|
2024/07
|
17
|
17
|
16
|
18
|
16
|
15
|
13
|
16
|
13
|
20
|
24
|
26
|
23
|
23
|
20
|
19
|
18
|
15
|
17
|
21
|
22
|
29
|
35
|
26
|
12
|
7
|
11
|
18
|
21
|
19
|
11
|
|
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