Air Quality
Excellent
No health implications.
10
PM2.5
16
PM10
30
O3
0.4
CO
6
SO2
25
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
27 Jan
46
Excellent
Wed
28 Jan
52
Good
Thu
29 Jan
46
Excellent
Fri
30 Jan
47
Excellent
Sat
31 Jan
44
Excellent
Sun
1 Feb
54
Good
Mon
2 Feb
40
Excellent
Air quality in the last 12 months (Ouhai)
|
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
|
|
|
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
|
|
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