Air Quality
Excellent
No health implications.
5
PM2.5
7
PM10
43
O3
0.4
CO
7
SO2
7
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
4 May
39
Excellent
Sun
5 May
46
Excellent
Mon
6 May
57
Good
Tue
7 May
61
Good
Wed
8 May
70
Good
Thu
9 May
67
Good
Air quality in the last 12 months (Changsha County)
|
2024/02
|
37
|
20
|
30
|
61
|
69
|
50
|
103
|
119
|
146
|
244
|
93
|
71
|
50
|
49
|
67
|
41
|
38
|
36
|
78
|
23
|
18
|
42
|
52
|
48
|
71
|
75
|
81
|
74
|
83
|
||
|
2024/01
|
107
|
105
|
65
|
69
|
78
|
110
|
159
|
142
|
135
|
145
|
91
|
99
|
81
|
118
|
186
|
117
|
61
|
20
|
15
|
51
|
76
|
52
|
44
|
45
|
54
|
69
|
79
|
86
|
106
|
54
|
58
|
|
2023/12
|
45
|
68
|
91
|
93
|
73
|
78
|
79
|
58
|
61
|
70
|
19
|
48
|
49
|
54
|
24
|
37
|
42
|
41
|
53
|
53
|
73
|
50
|
56
|
83
|
81
|
70
|
123
|
233
|
258
|
233
|
164
|
|
2023/11
|
62
|
57
|
70
|
89
|
70
|
30
|
48
|
36
|
27
|
39
|
32
|
29
|
69
|
67
|
52
|
82
|
97
|
73
|
71
|
65
|
65
|
68
|
80
|
77
|
70
|
70
|
89
|
74
|
77
|
70
|
|
|
2023/10
|
28
|
35
|
18
|
25
|
29
|
56
|
36
|
46
|
35
|
37
|
54
|
66
|
89
|
67
|
79
|
65
|
66
|
67
|
62
|
31
|
48
|
56
|
60
|
72
|
65
|
71
|
77
|
55
|
65
|
73
|
70
|
|
2023/09
|
39
|
39
|
32
|
38
|
42
|
36
|
24
|
29
|
45
|
49
|
35
|
30
|
25
|
25
|
21
|
31
|
33
|
31
|
33
|
26
|
17
|
20
|
22
|
20
|
14
|
22
|
40
|
48
|
54
|
39
|
|
|
2023/08
|
22
|
21
|
26
|
61
|
46
|
37
|
29
|
28
|
32
|
39
|
44
|
39
|
27
|
31
|
28
|
47
|
47
|
44
|
50
|
47
|
44
|
27
|
34
|
46
|
43
|
41
|
24
|
22
|
32
|
36
|
36
|
|
2023/07
|
36
|
33
|
27
|
25
|
23
|
24
|
24
|
26
|
29
|
30
|
33
|
28
|
30
|
39
|
35
|
51
|
36
|
20
|
21
|
24
|
30
|
22
|
23
|
34
|
24
|
23
|
23
|
18
|
25
|
30
|
24
|
|
2023/06
|
40
|
51
|
53
|
56
|
30
|
31
|
45
|
35
|
54
|
41
|
53
|
44
|
38
|
42
|
49
|
44
|
28
|
22
|
39
|
19
|
26
|
26
|
25
|
27
|
27
|
20
|
23
|
27
|
26
|
30
|
|
|
2023/05
|
67
|
67
|
38
|
29
|
25
|
19
|
39
|
49
|
47
|
49
|
42
|
57
|
62
|
73
|
63
|
56
|
33
|
37
|
55
|
51
|
37
|
40
|
54
|
38
|
37
|
50
|
46
|
35
|
56
|
52
|
33
|
|
2023/04
|
53
|
45
|
33
|
18
|
27
|
33
|
60
|
74
|
69
|
66
|
52
|
51
|
52
|
44
|
86
|
74
|
59
|
33
|
32
|
43
|
43
|
34
|
13
|
16
|
28
|
47
|
46
|
43
|
116
|
95
|
|
|
2023/03
|
117
|
156
|
157
|
105
|
77
|
61
|
72
|
100
|
75
|
64
|
64
|
134
|
125
|
90
|
68
|
122
|
34
|
35
|
15
|
29
|
27
|
31
|
44
|
40
|
60
|
59
|
71
|
82
|
68
|
67
|
53
|
|
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