Air Quality
Excellent
No health implications.
17
PM2.5
29
PM10
40
O3
0.4
CO
2
SO2
19
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
15 Feb
62
Good
Mon
16 Feb
51
Good
Tue
17 Feb
107
Light
Wed
18 Feb
49
Excellent
Thu
19 Feb
58
Good
Fri
20 Feb
56
Good
Sat
21 Feb
26
Excellent
Air quality in the last 12 months (Changtai)
|
2026/01
|
27
|
25
|
40
|
49
|
47
|
30
|
43
|
56
|
55
|
61
|
62
|
62
|
61
|
62
|
69
|
69
|
64
|
69
|
62
|
42
|
38
|
41
|
33
|
40
|
40
|
52
|
48
|
38
|
41
|
48
|
34
|
|
2025/12
|
47
|
51
|
44
|
47
|
46
|
44
|
50
|
53
|
50
|
46
|
48
|
53
|
38
|
34
|
51
|
51
|
56
|
58
|
65
|
54
|
63
|
33
|
41
|
52
|
24
|
29
|
33
|
42
|
46
|
49
|
51
|
|
2025/11
|
28
|
46
|
40
|
15
|
16
|
25
|
38
|
39
|
47
|
22
|
27
|
10
|
12
|
30
|
45
|
50
|
45
|
39
|
23
|
37
|
44
|
52
|
53
|
53
|
41
|
66
|
58
|
69
|
75
|
58
|
|
|
2025/10
|
43
|
28
|
36
|
37
|
30
|
28
|
36
|
34
|
33
|
33
|
34
|
37
|
32
|
36
|
28
|
34
|
39
|
33
|
25
|
18
|
12
|
13
|
22
|
24
|
25
|
37
|
46
|
35
|
20
|
35
|
40
|
|
2025/09
|
35
|
27
|
30
|
34
|
35
|
26
|
14
|
12
|
14
|
20
|
22
|
31
|
30
|
33
|
30
|
28
|
25
|
19
|
18
|
10
|
19
|
19
|
15
|
12
|
20
|
23
|
27
|
29
|
37
|
46
|
|
|
2025/08
|
24
|
26
|
19
|
14
|
14
|
24
|
31
|
36
|
25
|
14
|
14
|
24
|
21
|
12
|
18
|
20
|
24
|
20
|
17
|
18
|
24
|
21
|
28
|
25
|
27
|
18
|
17
|
24
|
22
|
25
|
31
|
|
2025/07
|
31
|
25
|
29
|
31
|
13
|
22
|
29
|
34
|
35
|
14
|
10
|
22
|
35
|
23
|
29
|
34
|
37
|
25
|
20
|
17
|
10
|
13
|
17
|
20
|
21
|
19
|
22
|
18
|
21
|
20
|
16
|
|
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
|
|||
|
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