Air Quality
Excellent
No health implications.
6
PM2.5
9
PM10
39
O3
0.2
CO
3
SO2
15
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
18 Nov
43
Excellent
Tue
19 Nov
48
Excellent
Wed
20 Nov
80
Good
Thu
21 Nov
85
Good
Fri
22 Nov
88
Good
Sat
23 Nov
85
Good
Air quality in the last 12 months (Changsha County)
|
2024/10
|
35
|
58
|
59
|
45
|
53
|
92
|
61
|
45
|
63
|
80
|
76
|
107
|
202
|
62
|
94
|
95
|
51
|
41
|
28
|
42
|
37
|
19
|
42
|
45
|
66
|
68
|
81
|
158
|
98
|
63
|
69
|
|
2024/09
|
46
|
43
|
58
|
55
|
42
|
50
|
45
|
34
|
38
|
35
|
44
|
33
|
31
|
41
|
48
|
47
|
50
|
49
|
45
|
49
|
39
|
38
|
41
|
54
|
64
|
78
|
96
|
56
|
42
|
52
|
|
|
2024/08
|
23
|
26
|
26
|
31
|
34
|
31
|
34
|
37
|
38
|
42
|
43
|
37
|
30
|
35
|
38
|
25
|
35
|
20
|
31
|
35
|
44
|
37
|
28
|
32
|
39
|
40
|
44
|
28
|
32
|
43
|
43
|
|
2024/07
|
23
|
30
|
30
|
21
|
23
|
25
|
28
|
26
|
30
|
32
|
35
|
35
|
35
|
28
|
32
|
29
|
25
|
23
|
20
|
23
|
27
|
25
|
30
|
39
|
41
|
36
|
25
|
10
|
14
|
15
|
19
|
|
2024/06
|
24
|
36
|
45
|
21
|
27
|
31
|
39
|
39
|
30
|
18
|
23
|
24
|
29
|
27
|
27
|
27
|
19
|
23
|
19
|
26
|
28
|
29
|
36
|
15
|
13
|
16
|
23
|
25
|
26
|
15
|
|
|
2024/05
|
48
|
49
|
28
|
18
|
46
|
39
|
55
|
78
|
55
|
64
|
55
|
103
|
91
|
62
|
65
|
73
|
66
|
53
|
51
|
35
|
57
|
25
|
37
|
45
|
37
|
35
|
27
|
30
|
34
|
17
|
40
|
|
2024/04
|
35
|
27
|
55
|
68
|
79
|
74
|
72
|
66
|
41
|
48
|
61
|
51
|
48
|
39
|
67
|
40
|
48
|
51
|
36
|
33
|
57
|
82
|
43
|
56
|
63
|
64
|
51
|
47
|
42
|
16
|
|
|
2024/03
|
126
|
61
|
47
|
41
|
79
|
114
|
74
|
72
|
74
|
73
|
84
|
68
|
59
|
91
|
71
|
76
|
77
|
31
|
57
|
78
|
75
|
53
|
35
|
66
|
33
|
38
|
49
|
43
|
42
|
53
|
42
|
|
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
|
|
|
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