Air Quality
Excellent
No health implications.
18
PM2.5
24
PM10
44
O3
0.4
CO
6
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
18 May
61
Good
Mon
19 May
59
Good
Tue
20 May
55
Good
Wed
21 May
56
Good
Thu
22 May
52
Good
Fri
23 May
52
Good
Sat
24 May
46
Excellent
Air quality in the last 12 months (Quannan)
|
2025/02
|
51
|
25
|
17
|
32
|
56
|
61
|
20
|
48
|
43
|
39
|
49
|
53
|
50
|
51
|
56
|
68
|
47
|
57
|
39
|
42
|
24
|
22
|
22
|
35
|
52
|
71
|
81
|
66
|
|||
|
2025/01
|
70
|
72
|
70
|
56
|
70
|
72
|
67
|
69
|
66
|
59
|
50
|
50
|
61
|
60
|
72
|
83
|
64
|
59
|
57
|
59
|
65
|
71
|
72
|
52
|
43
|
25
|
23
|
41
|
128
|
56
|
49
|
|
2024/12
|
65
|
68
|
50
|
47
|
57
|
50
|
44
|
37
|
46
|
49
|
45
|
30
|
30
|
43
|
54
|
54
|
60
|
60
|
59
|
47
|
50
|
68
|
73
|
50
|
56
|
63
|
71
|
75
|
69
|
68
|
73
|
|
2024/11
|
23
|
26
|
41
|
52
|
50
|
45
|
33
|
36
|
49
|
51
|
45
|
36
|
32
|
41
|
40
|
25
|
31
|
18
|
16
|
16
|
21
|
27
|
33
|
37
|
34
|
17
|
29
|
31
|
38
|
55
|
|
|
2024/10
|
20
|
15
|
23
|
25
|
24
|
31
|
34
|
30
|
30
|
40
|
49
|
49
|
46
|
49
|
47
|
39
|
43
|
49
|
43
|
22
|
33
|
37
|
36
|
36
|
32
|
34
|
41
|
17
|
34
|
46
|
26
|
|
2024/09
|
37
|
42
|
47
|
34
|
30
|
19
|
16
|
21
|
19
|
34
|
46
|
52
|
33
|
42
|
28
|
27
|
28
|
22
|
36
|
22
|
24
|
15
|
17
|
21
|
19
|
31
|
28
|
23
|
29
|
19
|
|
|
2024/08
|
27
|
30
|
35
|
46
|
42
|
39
|
34
|
35
|
36
|
48
|
42
|
33
|
25
|
30
|
24
|
20
|
24
|
20
|
19
|
18
|
16
|
25
|
29
|
29
|
42
|
46
|
36
|
35
|
39
|
35
|
36
|
|
2024/07
|
19
|
20
|
21
|
21
|
20
|
18
|
14
|
18
|
15
|
20
|
22
|
28
|
24
|
25
|
21
|
19
|
19
|
17
|
18
|
25
|
24
|
31
|
37
|
33
|
20
|
12
|
15
|
19
|
20
|
21
|
14
|
|
2024/06
|
12
|
10
|
36
|
26
|
23
|
30
|
29
|
32
|
23
|
26
|
21
|
28
|
33
|
21
|
22
|
19
|
17
|
25
|
21
|
23
|
24
|
34
|
22
|
17
|
20
|
25
|
24
|
21
|
16
|
20
|
|
|
2024/05
|
27
|
24
|
32
|
42
|
26
|
36
|
55
|
50
|
51
|
50
|
49
|
35
|
40
|
38
|
47
|
57
|
58
|
56
|
44
|
20
|
14
|
13
|
26
|
22
|
32
|
18
|
16
|
25
|
34
|
48
|
36
|
|
2024/04
|
40
|
62
|
48
|
43
|
23
|
29
|
18
|
32
|
26
|
46
|
54
|
61
|
73
|
50
|
59
|
54
|
43
|
39
|
39
|
50
|
23
|
38
|
36
|
26
|
34
|
26
|
33
|
18
|
27
|
27
|
|
|
2024/03
|
12
|
29
|
48
|
44
|
65
|
43
|
38
|
62
|
61
|
54
|
36
|
35
|
70
|
67
|
56
|
72
|
62
|
47
|
50
|
62
|
67
|
70
|
70
|
46
|
44
|
43
|
47
|
53
|
55
|
60
|
41
|
|
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