Air Quality
Excellent
No health implications.
24
PM2.5
27
PM10
115
O3
0.5
CO
3
SO2
13
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
11 May
88
Good
Mon
12 May
101
Light
Tue
13 May
90
Good
Wed
14 May
95
Good
Thu
15 May
60
Good
Fri
16 May
55
Good
Sat
17 May
36
Excellent
Air quality in the last 12 months (Ouhai)
|
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
|
|
2024/06
|
9
|
14
|
25
|
44
|
45
|
12
|
21
|
37
|
34
|
22
|
27
|
32
|
30
|
46
|
21
|
22
|
17
|
19
|
40
|
52
|
42
|
47
|
54
|
25
|
19
|
27
|
44
|
30
|
25
|
29
|
|
|
2024/05
|
14
|
39
|
41
|
44
|
60
|
43
|
46
|
52
|
28
|
29
|
49
|
42
|
35
|
40
|
55
|
32
|
36
|
39
|
36
|
33
|
24
|
34
|
48
|
28
|
16
|
27
|
25
|
16
|
29
|
31
|
35
|
|
2024/04
|
50
|
53
|
47
|
30
|
38
|
41
|
34
|
41
|
34
|
58
|
60
|
47
|
40
|
27
|
42
|
54
|
42
|
37
|
89
|
81
|
64
|
25
|
30
|
40
|
43
|
62
|
51
|
35
|
39
|
21
|
|
|
2024/03
|
23
|
48
|
60
|
69
|
70
|
12
|
65
|
82
|
76
|
55
|
46
|
58
|
87
|
71
|
56
|
43
|
63
|
30
|
42
|
68
|
66
|
66
|
73
|
73
|
50
|
38
|
41
|
61
|
57
|
60
|
55
|
|
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