Air Quality
Excellent
No health implications.
9
PM2.5
19
PM10
31
O3
0.7
CO
7
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 May
44
Excellent
Thu
22 May
40
Excellent
Fri
23 May
62
Good
Sat
24 May
67
Good
Sun
25 May
73
Good
Mon
26 May
19
Excellent
Tue
27 May
16
Excellent
Air quality in the last 12 months (Hengshan)
|
2025/04
|
60
|
60
|
66
|
95
|
94
|
87
|
78
|
75
|
84
|
74
|
64
|
246
|
181
|
134
|
88
|
75
|
80
|
67
|
32
|
42
|
39
|
41
|
59
|
33
|
31
|
39
|
38
|
50
|
68
|
56
|
|
|
2025/03
|
34
|
36
|
13
|
31
|
43
|
55
|
54
|
50
|
53
|
49
|
49
|
64
|
68
|
22
|
26
|
48
|
46
|
42
|
45
|
55
|
61
|
60
|
84
|
81
|
77
|
86
|
89
|
63
|
54
|
21
|
51
|
|
2025/02
|
43
|
33
|
58
|
63
|
68
|
77
|
67
|
51
|
46
|
52
|
71
|
79
|
106
|
120
|
58
|
49
|
58
|
44
|
40
|
32
|
96
|
31
|
49
|
83
|
110
|
97
|
64
|
50
|
|||
|
2025/01
|
140
|
126
|
168
|
190
|
129
|
96
|
91
|
80
|
58
|
57
|
66
|
81
|
80
|
76
|
86
|
66
|
76
|
87
|
118
|
111
|
113
|
113
|
192
|
225
|
25
|
33
|
55
|
84
|
253
|
123
|
59
|
|
2024/12
|
67
|
76
|
103
|
135
|
43
|
50
|
60
|
78
|
91
|
68
|
58
|
83
|
101
|
62
|
60
|
72
|
79
|
86
|
98
|
123
|
115
|
103
|
86
|
104
|
131
|
127
|
149
|
114
|
96
|
123
|
135
|
|
2024/11
|
79
|
128
|
98
|
96
|
110
|
77
|
68
|
56
|
70
|
91
|
71
|
85
|
72
|
102
|
105
|
126
|
23
|
13
|
23
|
41
|
56
|
59
|
73
|
92
|
40
|
29
|
42
|
49
|
55
|
58
|
|
|
2024/10
|
32
|
53
|
56
|
51
|
54
|
82
|
74
|
56
|
60
|
69
|
79
|
90
|
176
|
75
|
55
|
53
|
52
|
45
|
30
|
34
|
47
|
23
|
37
|
45
|
57
|
75
|
75
|
104
|
86
|
59
|
61
|
|
2024/09
|
45
|
45
|
52
|
51
|
44
|
47
|
35
|
33
|
42
|
39
|
43
|
33
|
26
|
42
|
42
|
44
|
48
|
47
|
41
|
45
|
35
|
33
|
38
|
48
|
63
|
71
|
68
|
58
|
47
|
51
|
|
|
2024/08
|
17
|
19
|
27
|
31
|
34
|
29
|
29
|
30
|
35
|
35
|
28
|
30
|
27
|
33
|
37
|
34
|
43
|
47
|
30
|
36
|
47
|
25
|
24
|
27
|
34
|
36
|
41
|
26
|
29
|
35
|
44
|
|
2024/07
|
20
|
18
|
25
|
18
|
16
|
17
|
20
|
18
|
22
|
23
|
25
|
28
|
25
|
19
|
28
|
20
|
16
|
16
|
16
|
21
|
24
|
27
|
27
|
39
|
42
|
34
|
21
|
11
|
16
|
15
|
16
|
|
2024/06
|
22
|
28
|
38
|
22
|
24
|
33
|
39
|
38
|
39
|
23
|
25
|
21
|
20
|
22
|
22
|
28
|
14
|
18
|
16
|
24
|
23
|
22
|
23
|
20
|
8
|
16
|
25
|
26
|
20
|
20
|
|
|
2024/05
|
27
|
44
|
40
|
17
|
39
|
56
|
79
|
79
|
66
|
81
|
39
|
81
|
87
|
64
|
60
|
67
|
59
|
51
|
29
|
27
|
47
|
36
|
38
|
37
|
34
|
28
|
20
|
30
|
29
|
18
|
27
|
|
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