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
21 May
Thu
22 May
Fri
23 May
Sat
24 May
Sun
25 May
Mon
26 May
Tue
27 May
Real-time AQI (Monitoring Station in Hengyang)
原169医院
2612
PM2.5
23
PM10
83
O3
0.4
CO
3
SO2
3
NO2
衡阳化工总厂
2510
PM2.5
18
PM10
77
O3
0.4
CO
5
SO2
1
NO2
市监测站
2410
PM2.5
15
PM10
74
O3
0.3
CO
9
SO2
5
NO2
真空机电公司
2410
PM2.5
16
PM10
75
O3
0.4
CO
5
SO2
2
NO2
师范学院
3312
PM2.5
33
PM10
79
O3
0.6
CO
8
SO2
4
NO2
Air quality in the last 12 months (Hengyang)
|
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
|
|
|
2024/05
|
23
|
38
|
34
|
16
|
35
|
71
|
101
|
94
|
72
|
93
|
38
|
75
|
87
|
70
|
65
|
69
|
61
|
50
|
27
|
22
|
41
|
41
|
42
|
45
|
35
|
30
|
20
|
34
|
29
|
19
|
22
|
|
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