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 Jun
Wed
18 Jun
Thu
19 Jun
Fri
20 Jun
Sat
21 Jun
Sun
22 Jun
Mon
23 Jun
Real-time AQI (Monitoring Station in Hengyang)
衡阳化工总厂
153
PM2.5
6
PM10
47
O3
0.4
CO
4
SO2
7
NO2
市委党校
153
PM2.5
8
PM10
48
O3
0.4
CO
5
SO2
6
NO2
市监测站
163
PM2.5
6
PM10
49
O3
0.3
CO
7
SO2
6
NO2
Air quality in the last 12 months (Hengyang)
|
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
|
|
|
2024/08
|
17
|
21
|
25
|
31
|
33
|
32
|
31
|
31
|
33
|
34
|
30
|
32
|
27
|
35
|
39
|
36
|
45
|
60
|
36
|
45
|
46
|
24
|
24
|
24
|
41
|
38
|
45
|
25
|
35
|
39
|
50
|
|
2024/07
|
25
|
17
|
25
|
19
|
22
|
22
|
26
|
21
|
23
|
26
|
27
|
28
|
26
|
22
|
30
|
24
|
18
|
18
|
17
|
24
|
25
|
27
|
27
|
35
|
44
|
35
|
22
|
12
|
17
|
15
|
17
|
|
2024/06
|
23
|
27
|
39
|
21
|
21
|
33
|
42
|
40
|
42
|
30
|
29
|
24
|
21
|
23
|
22
|
26
|
16
|
19
|
19
|
26
|
25
|
24
|
28
|
25
|
10
|
16
|
30
|
30
|
23
|
25
|
|
|
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