Air Quality
Excellent
No health implications.
4
PM2.5
10
PM10
48
O3
0.5
CO
6
SO2
27
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
12 Apr
57
Good
Mon
13 Apr
60
Good
Tue
14 Apr
52
Good
Wed
15 Apr
59
Good
Thu
16 Apr
52
Good
Fri
17 Apr
58
Good
Sat
18 Apr
48
Excellent
Ouhai Air quality rank
Air quality in the last 12 months (Ouhai)
|
2026/03
|
20
|
25
|
32
|
33
|
21
|
28
|
46
|
40
|
38
|
37
|
43
|
46
|
56
|
53
|
44
|
37
|
41
|
57
|
25
|
56
|
35
|
44
|
34
|
35
|
54
|
46
|
55
|
37
|
44
|
42
|
41
|
|
2026/02
|
19
|
34
|
51
|
44
|
47
|
47
|
15
|
34
|
34
|
37
|
43
|
71
|
61
|
40
|
39
|
24
|
30
|
39
|
56
|
48
|
44
|
36
|
110
|
50
|
25
|
29
|
21
|
21
|
|||
|
2026/01
|
24
|
28
|
57
|
77
|
44
|
52
|
58
|
62
|
73
|
71
|
64
|
65
|
65
|
68
|
58
|
71
|
79
|
62
|
43
|
11
|
30
|
50
|
57
|
57
|
81
|
60
|
22
|
35
|
37
|
32
|
13
|
|
2025/12
|
70
|
70
|
52
|
50
|
51
|
52
|
59
|
76
|
44
|
51
|
50
|
60
|
43
|
37
|
56
|
59
|
67
|
83
|
71
|
64
|
64
|
31
|
50
|
75
|
29
|
43
|
42
|
48
|
54
|
74
|
48
|
|
2025/11
|
35
|
53
|
41
|
22
|
19
|
36
|
36
|
40
|
26
|
31
|
29
|
15
|
15
|
38
|
52
|
45
|
40
|
20
|
32
|
46
|
62
|
66
|
63
|
62
|
61
|
87
|
78
|
87
|
85
|
75
|
|
|
2025/10
|
21
|
20
|
15
|
14
|
22
|
33
|
30
|
29
|
26
|
28
|
28
|
29
|
26
|
27
|
18
|
29
|
26
|
32
|
10
|
14
|
18
|
22
|
31
|
35
|
41
|
43
|
30
|
32
|
26
|
31
|
16
|
|
2025/09
|
22
|
20
|
17
|
24
|
26
|
19
|
14
|
25
|
21
|
19
|
20
|
27
|
39
|
27
|
34
|
17
|
18
|
15
|
13
|
19
|
21
|
23
|
17
|
17
|
16
|
20
|
19
|
23
|
23
|
24
|
|
|
2025/08
|
35
|
34
|
33
|
24
|
20
|
26
|
34
|
47
|
44
|
44
|
40
|
27
|
18
|
17
|
14
|
14
|
17
|
17
|
18
|
29
|
28
|
31
|
24
|
19
|
18
|
17
|
14
|
15
|
15
|
17
|
17
|
|
2025/07
|
13
|
20
|
22
|
27
|
19
|
15
|
10
|
11
|
15
|
21
|
25
|
24
|
23
|
32
|
43
|
41
|
38
|
22
|
14
|
16
|
10
|
19
|
19
|
16
|
16
|
13
|
18
|
16
|
18
|
19
|
33
|
|
2025/06
|
39
|
50
|
22
|
31
|
33
|
40
|
37
|
33
|
24
|
20
|
11
|
17
|
18
|
28
|
25
|
19
|
37
|
33
|
23
|
20
|
30
|
36
|
24
|
28
|
28
|
30
|
32
|
25
|
20
|
10
|
|
|
2025/05
|
39
|
50
|
56
|
37
|
39
|
46
|
56
|
46
|
40
|
34
|
36
|
37
|
35
|
33
|
32
|
45
|
52
|
22
|
36
|
46
|
37
|
36
|
50
|
32
|
68
|
56
|
28
|
32
|
20
|
36
|
50
|
|
2025/04
|
31
|
54
|
61
|
61
|
44
|
58
|
59
|
56
|
67
|
50
|
48
|
49
|
93
|
87
|
71
|
64
|
80
|
67
|
44
|
51
|
52
|
41
|
28
|
33
|
21
|
51
|
53
|
45
|
39
|
38
|
|
|
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