Air Quality
Excellent
No health implications.
PM2.5
PM10
O3
CO
SO2
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 Oct
Sat
18 Oct
Sun
19 Oct
Mon
20 Oct
Tue
21 Oct
Wed
22 Oct
Thu
23 Oct
Real-time AQI (Monitoring Station in Hengyang)
衡阳化工总厂
5335
PM2.5
55 *
PM10
34
O3
1.0
CO
6
SO2
10
NO2
市监测站
3323
PM2.5
24
PM10
38
O3
1.1
CO
5
SO2
10
NO2
真空机电公司
5534
PM2.5
59 *
PM10
26
O3
1.1
CO
5
SO2
6
NO2
师范学院
2516
PM2.5
25
PM10
41
O3
1.1
CO
6
SO2
9
NO2
Air quality in the last 12 months (Hengyang)
|
2025/08
|
36
|
41
|
24
|
23
|
26
|
16
|
17
|
21
|
27
|
30
|
36
|
47
|
35
|
24
|
14
|
27
|
28
|
23
|
14
|
21
|
19
|
23
|
29
|
24
|
24
|
23
|
35
|
32
|
30
|
25
|
26
|
|
2025/07
|
17
|
16
|
23
|
31
|
42
|
44
|
50
|
41
|
39
|
28
|
27
|
29
|
31
|
35
|
26
|
26
|
30
|
40
|
38
|
33
|
23
|
14
|
16
|
26
|
26
|
29
|
21
|
25
|
25
|
24
|
26
|
|
2025/06
|
18
|
23
|
37
|
47
|
51
|
43
|
32
|
27
|
37
|
41
|
40
|
24
|
35
|
20
|
16
|
25
|
16
|
13
|
17
|
22
|
24
|
15
|
27
|
21
|
39
|
34
|
17
|
17
|
19
|
21
|
|
|
2025/05
|
53
|
63
|
67
|
59
|
46
|
53
|
73
|
48
|
33
|
54
|
52
|
75
|
63
|
51
|
64
|
27
|
31
|
27
|
29
|
21
|
24
|
25
|
27
|
54
|
53
|
53
|
54
|
19
|
22
|
32
|
17
|
|
2025/04
|
61
|
66
|
72
|
118
|
105
|
89
|
83
|
76
|
78
|
63
|
59
|
222
|
225
|
142
|
94
|
76
|
82
|
69
|
32
|
32
|
36
|
37
|
55
|
32
|
29
|
41
|
28
|
43
|
64
|
53
|
|
|
2025/03
|
34
|
38
|
18
|
27
|
39
|
50
|
59
|
51
|
51
|
46
|
54
|
47
|
56
|
25
|
22
|
48
|
44
|
43
|
45
|
54
|
65
|
66
|
83
|
84
|
84
|
81
|
79
|
62
|
49
|
22
|
48
|
|
2025/02
|
42
|
29
|
56
|
75
|
86
|
81
|
67
|
53
|
48
|
56
|
74
|
79
|
100
|
119
|
58
|
46
|
56
|
46
|
39
|
26
|
93
|
37
|
44
|
89
|
107
|
105
|
63
|
39
|
|||
|
2025/01
|
153
|
132
|
160
|
181
|
147
|
101
|
94
|
86
|
60
|
62
|
68
|
90
|
88
|
84
|
89
|
68
|
83
|
91
|
125
|
111
|
113
|
120
|
176
|
250
|
36
|
34
|
58
|
70
|
221
|
148
|
69
|
|
2024/12
|
75
|
83
|
94
|
147
|
47
|
48
|
52
|
72
|
105
|
78
|
58
|
82
|
100
|
63
|
60
|
74
|
84
|
80
|
97
|
124
|
120
|
106
|
88
|
102
|
131
|
124
|
137
|
122
|
100
|
123
|
124
|
|
2024/11
|
66
|
115
|
92
|
87
|
103
|
73
|
67
|
51
|
63
|
83
|
62
|
71
|
65
|
81
|
71
|
79
|
21
|
14
|
16
|
34
|
51
|
54
|
69
|
80
|
40
|
28
|
40
|
45
|
54
|
64
|
|
|
2024/10
|
30
|
52
|
56
|
53
|
56
|
77
|
74
|
55
|
52
|
67
|
75
|
73
|
171
|
79
|
38
|
38
|
54
|
46
|
29
|
26
|
41
|
24
|
36
|
46
|
59
|
68
|
56
|
69
|
69
|
55
|
60
|
|
2024/09
|
48
|
51
|
53
|
51
|
49
|
46
|
34
|
34
|
45
|
40
|
44
|
36
|
29
|
43
|
43
|
41
|
47
|
46
|
42
|
41
|
33
|
32
|
39
|
46
|
69
|
60
|
61
|
57
|
51
|
51
|
|
|
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
*: primary pollution