Air Quality
Excellent
No health implications.
4
PM2.5
12
PM10
48
O3
0.2
CO
3
SO2
2
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
28 Aug
42
Excellent
Fri
29 Aug
41
Excellent
Sat
30 Aug
45
Excellent
Sun
31 Aug
46
Excellent
Mon
1 Sep
47
Excellent
Tue
2 Sep
42
Excellent
Wed
3 Sep
30
Excellent
Ouhai Air quality rank
Air quality in the last 12 months (Ouhai)
|
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
|
|
|
2025/03
|
63
|
58
|
54
|
31
|
20
|
18
|
45
|
60
|
62
|
46
|
72
|
52
|
31
|
37
|
19
|
31
|
43
|
50
|
50
|
60
|
56
|
53
|
66
|
74
|
90
|
71
|
62
|
33
|
44
|
31
|
29
|
|
2025/02
|
37
|
13
|
47
|
76
|
51
|
55
|
49
|
39
|
38
|
49
|
47
|
46
|
91
|
52
|
53
|
65
|
69
|
34
|
54
|
29
|
19
|
39
|
29
|
95
|
108
|
80
|
81
|
63
|
|||
|
2025/01
|
82
|
51
|
58
|
52
|
52
|
74
|
80
|
80
|
60
|
39
|
49
|
58
|
64
|
64
|
92
|
47
|
62
|
61
|
55
|
71
|
102
|
84
|
57
|
33
|
39
|
32
|
29
|
42
|
86
|
48
|
48
|
|
2024/12
|
55
|
60
|
62
|
59
|
53
|
33
|
40
|
69
|
39
|
54
|
27
|
35
|
18
|
102
|
90
|
59
|
54
|
66
|
39
|
35
|
61
|
65
|
49
|
51
|
51
|
84
|
122
|
66
|
66
|
58
|
72
|
|
2024/11
|
8
|
9
|
38
|
52
|
51
|
34
|
25
|
32
|
33
|
32
|
22
|
32
|
34
|
34
|
18
|
21
|
23
|
13
|
21
|
24
|
36
|
34
|
47
|
33
|
41
|
23
|
40
|
44
|
49
|
52
|
|
|
2024/10
|
19
|
15
|
20
|
19
|
22
|
17
|
14
|
12
|
36
|
45
|
56
|
49
|
39
|
51
|
36
|
25
|
40
|
43
|
30
|
15
|
38
|
39
|
21
|
40
|
28
|
23
|
19
|
16
|
50
|
43
|
24
|
|
2024/09
|
37
|
33
|
26
|
23
|
23
|
18
|
23
|
15
|
28
|
39
|
33
|
30
|
16
|
26
|
23
|
22
|
16
|
22
|
18
|
19
|
27
|
12
|
15
|
20
|
16
|
22
|
23
|
31
|
35
|
26
|
|
|
2024/08
|
31
|
40
|
42
|
43
|
29
|
28
|
40
|
39
|
41
|
41
|
52
|
46
|
40
|
32
|
26
|
31
|
24
|
23
|
17
|
20
|
21
|
27
|
40
|
43
|
33
|
29
|
42
|
28
|
37
|
30
|
33
|
|
2024/07
|
29
|
29
|
34
|
34
|
35
|
28
|
30
|
31
|
36
|
42
|
44
|
50
|
35
|
33
|
25
|
16
|
27
|
37
|
31
|
21
|
25
|
17
|
16
|
14
|
18
|
18
|
18
|
19
|
15
|
16
|
24
|
|
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