Air Quality
Excellent
No health implications.
32
PM2.5
38
PM10
39
O3
0.6
CO
4
SO2
25
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
14 Mar
44
Excellent
Sat
15 Mar
44
Excellent
Sun
16 Mar
54
Good
Mon
17 Mar
61
Good
Tue
18 Mar
58
Good
Wed
19 Mar
82
Good
Thu
20 Mar
50
Excellent
Air quality in the last 12 months (Ouhai)
|
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
|
|
2024/02
|
33
|
17
|
27
|
17
|
16
|
36
|
14
|
47
|
95
|
98
|
59
|
64
|
51
|
49
|
49
|
21
|
29
|
40
|
44
|
22
|
26
|
11
|
15
|
14
|
17
|
33
|
39
|
54
|
16
|
||
|
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