Air Quality
Excellent
No health implications.
5
PM2.5
9
PM10
35
O3
0.4
CO
6
SO2
17
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
27 Jan
47
Excellent
Wed
28 Jan
48
Excellent
Thu
29 Jan
50
Excellent
Fri
30 Jan
55
Good
Sat
31 Jan
53
Good
Sun
1 Feb
53
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