Air Quality
Excellent
No health implications.
4
PM2.5
5
PM10
72
O3
0.6
CO
7
SO2
4
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
30 Apr
40
Excellent
Wed
1 May
52
Good
Thu
2 May
39
Excellent
Fri
3 May
38
Excellent
Sat
4 May
37
Excellent
Sun
5 May
35
Excellent
Air quality in the last 12 months (Hecheng)
|
2024/02
|
25
|
19
|
19
|
40
|
55
|
58
|
68
|
81
|
97
|
148
|
113
|
119
|
80
|
40
|
49
|
55
|
50
|
36
|
95
|
49
|
15
|
23
|
27
|
32
|
31
|
38
|
56
|
49
|
58
|
||
|
2024/01
|
101
|
72
|
71
|
89
|
87
|
91
|
100
|
162
|
133
|
112
|
90
|
60
|
75
|
90
|
100
|
122
|
59
|
21
|
14
|
34
|
64
|
44
|
70
|
65
|
82
|
84
|
60
|
80
|
85
|
55
|
36
|
|
2023/12
|
33
|
39
|
58
|
51
|
50
|
49
|
45
|
57
|
51
|
46
|
13
|
30
|
38
|
31
|
16
|
26
|
27
|
23
|
31
|
54
|
66
|
61
|
69
|
78
|
74
|
67
|
71
|
111
|
158
|
190
|
124
|
|
2023/11
|
43
|
42
|
43
|
27
|
25
|
23
|
40
|
28
|
19
|
17
|
11
|
18
|
28
|
39
|
29
|
29
|
36
|
43
|
47
|
60
|
62
|
75
|
86
|
59
|
52
|
63
|
66
|
77
|
79
|
54
|
|
|
2023/10
|
22
|
27
|
21
|
24
|
20
|
36
|
21
|
33
|
44
|
40
|
40
|
56
|
50
|
41
|
55
|
65
|
63
|
65
|
55
|
25
|
35
|
38
|
46
|
74
|
45
|
22
|
21
|
20
|
25
|
24
|
32
|
|
2023/09
|
45
|
46
|
35
|
33
|
45
|
47
|
44
|
40
|
43
|
46
|
38
|
39
|
23
|
34
|
41
|
39
|
39
|
31
|
25
|
26
|
19
|
19
|
26
|
23
|
22
|
32
|
38
|
47
|
48
|
56
|
|
|
2023/08
|
23
|
22
|
28
|
34
|
35
|
32
|
34
|
31
|
34
|
36
|
46
|
51
|
56
|
26
|
35
|
33
|
38
|
46
|
56
|
56
|
32
|
42
|
32
|
33
|
45
|
36
|
21
|
28
|
42
|
43
|
40
|
|
2023/07
|
26
|
26
|
25
|
23
|
21
|
20
|
21
|
22
|
23
|
24
|
25
|
24
|
24
|
28
|
25
|
48
|
44
|
42
|
27
|
27
|
21
|
18
|
26
|
30
|
34
|
27
|
35
|
31
|
34
|
34
|
31
|
|
2023/06
|
47
|
52
|
58
|
52
|
44
|
34
|
39
|
40
|
52
|
50
|
56
|
48
|
28
|
41
|
45
|
30
|
26
|
23
|
21
|
21
|
25
|
27
|
27
|
29
|
38
|
31
|
19
|
19
|
22
|
28
|
|
|
2023/05
|
66
|
67
|
53
|
41
|
43
|
30
|
40
|
57
|
62
|
37
|
40
|
48
|
55
|
63
|
68
|
65
|
42
|
63
|
69
|
46
|
47
|
41
|
52
|
50
|
57
|
48
|
40
|
32
|
44
|
55
|
37
|
|
2023/04
|
57
|
70
|
68
|
33
|
34
|
34
|
59
|
82
|
83
|
74
|
52
|
78
|
93
|
82
|
78
|
65
|
57
|
38
|
35
|
64
|
62
|
39
|
20
|
22
|
30
|
44
|
55
|
45
|
83
|
86
|
|
|
2023/03
|
99
|
99
|
111
|
77
|
68
|
72
|
88
|
70
|
58
|
66
|
63
|
115
|
72
|
71
|
76
|
80
|
31
|
33
|
21
|
20
|
23
|
39
|
41
|
37
|
55
|
61
|
60
|
61
|
54
|
53
|
57
|
|
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