Air Quality
Excellent
No health implications.
4
PM2.5
13
PM10
35
O3
0.6
CO
14
SO2
4
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 May
59
Good
Mon
18 May
59
Good
Tue
19 May
55
Good
Wed
20 May
61
Good
Thu
21 May
56
Good
Fri
22 May
47
Excellent
Sat
23 May
30
Excellent
Air quality in the last 12 months (Hengnan)
|
2026/04
|
36
|
41
|
24
|
39
|
55
|
36
|
42
|
49
|
50
|
42
|
27
|
29
|
36
|
23
|
24
|
23
|
38
|
45
|
48
|
45
|
16
|
17
|
28
|
43
|
46
|
57
|
58
|
43
|
28
|
32
|
|
|
2026/03
|
14
|
22
|
43
|
68
|
48
|
50
|
67
|
36
|
27
|
59
|
49
|
54
|
55
|
60
|
105
|
37
|
40
|
22
|
31
|
25
|
39
|
38
|
31
|
25
|
67
|
40
|
38
|
40
|
44
|
26
|
28
|
|
2026/02
|
47
|
56
|
59
|
81
|
97
|
68
|
68
|
59
|
55
|
60
|
63
|
72
|
64
|
62
|
71
|
25
|
91
|
73
|
52
|
44
|
60
|
67
|
55
|
35
|
49
|
31
|
18
|
24
|
|||
|
2026/01
|
33
|
56
|
67
|
69
|
57
|
78
|
75
|
64
|
67
|
90
|
102
|
93
|
110
|
88
|
97
|
115
|
100
|
111
|
39
|
21
|
52
|
65
|
66
|
44
|
66
|
62
|
127
|
79
|
55
|
32
|
39
|
|
2025/12
|
75
|
108
|
88
|
68
|
80
|
85
|
98
|
109
|
117
|
128
|
102
|
115
|
29
|
49
|
54
|
63
|
71
|
144
|
95
|
69
|
93
|
94
|
52
|
43
|
58
|
58
|
66
|
79
|
94
|
120
|
157
|
|
2025/11
|
49
|
44
|
26
|
27
|
29
|
27
|
46
|
14
|
10
|
16
|
39
|
56
|
44
|
48
|
52
|
58
|
61
|
28
|
33
|
43
|
50
|
59
|
70
|
60
|
54
|
64
|
76
|
85
|
77
|
73
|
|
|
2025/10
|
59
|
51
|
35
|
52
|
43
|
25
|
44
|
52
|
45
|
48
|
53
|
89
|
75
|
47
|
58
|
49
|
48
|
21
|
10
|
10
|
11
|
24
|
36
|
41
|
51
|
63
|
68
|
62
|
77
|
81
|
59
|
|
2025/09
|
19
|
24
|
31
|
34
|
37
|
36
|
36
|
30
|
19
|
23
|
20
|
22
|
26
|
38
|
39
|
43
|
34
|
35
|
30
|
21
|
23
|
19
|
26
|
11
|
14
|
23
|
38
|
49
|
58
|
52
|
|
|
2025/08
|
31
|
32
|
21
|
19
|
22
|
14
|
14
|
19
|
26
|
29
|
34
|
38
|
29
|
21
|
13
|
21
|
23
|
24
|
15
|
19
|
19
|
21
|
25
|
23
|
22
|
20
|
27
|
31
|
23
|
23
|
20
|
|
2025/07
|
20
|
19
|
23
|
28
|
38
|
43
|
50
|
37
|
36
|
26
|
26
|
28
|
33
|
36
|
27
|
29
|
33
|
45
|
35
|
37
|
26
|
12
|
13
|
22
|
21
|
28
|
19
|
20
|
25
|
21
|
22
|
|
2025/06
|
16
|
20
|
38
|
45
|
49
|
42
|
31
|
26
|
37
|
43
|
38
|
24
|
34
|
20
|
15
|
25
|
16
|
13
|
17
|
26
|
26
|
12
|
26
|
19
|
38
|
31
|
17
|
18
|
24
|
21
|
|
|
2025/05
|
54
|
60
|
63
|
54
|
40
|
51
|
67
|
45
|
30
|
51
|
58
|
74
|
61
|
47
|
66
|
26
|
29
|
26
|
28
|
21
|
22
|
26
|
26
|
54
|
52
|
52
|
52
|
15
|
20
|
32
|
14
|
|
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