Air Quality
Excellent
No health implications.
13
PM2.5
18
PM10
71
O3
0.3
CO
4
SO2
12
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 May
53
Good
Sun
18 May
53
Good
Mon
19 May
51
Good
Tue
20 May
59
Good
Wed
21 May
62
Good
Thu
22 May
55
Good
Fri
23 May
46
Excellent
Air quality in the last 12 months (Changtai)
|
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
|
|
2024/06
|
10
|
8
|
27
|
25
|
27
|
28
|
25
|
29
|
22
|
21
|
17
|
26
|
29
|
22
|
20
|
20
|
16
|
21
|
16
|
19
|
21
|
28
|
20
|
12
|
16
|
20
|
18
|
16
|
14
|
18
|
|
|
2024/05
|
29
|
21
|
30
|
40
|
25
|
38
|
51
|
49
|
49
|
41
|
46
|
34
|
26
|
31
|
43
|
57
|
52
|
54
|
44
|
20
|
13
|
11
|
22
|
23
|
31
|
18
|
15
|
23
|
29
|
46
|
31
|
|
2024/04
|
32
|
54
|
42
|
45
|
28
|
34
|
20
|
35
|
19
|
40
|
48
|
56
|
69
|
49
|
55
|
51
|
44
|
39
|
42
|
49
|
24
|
34
|
34
|
23
|
38
|
23
|
26
|
16
|
26
|
28
|
|
|
2024/03
|
9
|
26
|
44
|
48
|
63
|
42
|
34
|
62
|
63
|
63
|
39
|
32
|
70
|
66
|
56
|
73
|
62
|
44
|
56
|
57
|
58
|
67
|
70
|
38
|
38
|
46
|
47
|
52
|
52
|
57
|
37
|
|
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