Air Quality
Excellent
No health implications.
21
PM2.5
22
PM10
42
O3
0.2
CO
9
SO2
6
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
31 Oct
50
Excellent
Sat
1 Nov
54
Good
Sun
2 Nov
47
Excellent
Mon
3 Nov
48
Excellent
Tue
4 Nov
50
Excellent
Wed
5 Nov
50
Excellent
Thu
6 Nov
39
Excellent
Air quality in the last 12 months (Hecheng)
|
2025/08
|
31
|
39
|
36
|
31
|
33
|
24
|
15
|
21
|
23
|
23
|
33
|
26
|
19
|
17
|
14
|
19
|
32
|
34
|
23
|
25
|
17
|
19
|
24
|
27
|
23
|
25
|
27
|
26
|
37
|
37
|
31
|
|
2025/07
|
20
|
16
|
18
|
21
|
25
|
33
|
37
|
36
|
42
|
31
|
31
|
41
|
39
|
29
|
23
|
27
|
27
|
31
|
35
|
37
|
11
|
12
|
12
|
24
|
21
|
35
|
33
|
30
|
35
|
34
|
31
|
|
2025/06
|
19
|
24
|
37
|
39
|
40
|
38
|
25
|
20
|
30
|
38
|
38
|
29
|
30
|
21
|
23
|
34
|
19
|
14
|
10
|
11
|
13
|
12
|
12
|
11
|
24
|
28
|
25
|
19
|
22
|
21
|
|
|
2025/05
|
43
|
61
|
56
|
48
|
40
|
51
|
58
|
36
|
22
|
32
|
36
|
56
|
58
|
60
|
54
|
32
|
48
|
38
|
42
|
31
|
25
|
26
|
38
|
51
|
52
|
33
|
29
|
14
|
30
|
28
|
21
|
|
2025/04
|
50
|
57
|
69
|
79
|
84
|
79
|
73
|
86
|
74
|
62
|
57
|
49
|
123
|
110
|
88
|
82
|
71
|
64
|
26
|
36
|
43
|
32
|
54
|
32
|
43
|
41
|
28
|
41
|
56
|
29
|
|
|
2025/03
|
37
|
30
|
14
|
21
|
24
|
33
|
26
|
38
|
46
|
42
|
33
|
38
|
46
|
25
|
19
|
44
|
42
|
37
|
41
|
45
|
54
|
63
|
69
|
65
|
70
|
76
|
90
|
78
|
45
|
21
|
42
|
|
2025/02
|
29
|
18
|
46
|
61
|
72
|
68
|
57
|
82
|
56
|
51
|
41
|
49
|
67
|
48
|
39
|
55
|
36
|
41
|
37
|
33
|
85
|
27
|
44
|
84
|
41
|
37
|
29
|
37
|
|||
|
2025/01
|
107
|
95
|
131
|
187
|
162
|
102
|
83
|
54
|
49
|
70
|
80
|
85
|
87
|
90
|
85
|
71
|
79
|
128
|
114
|
96
|
112
|
147
|
180
|
138
|
18
|
25
|
59
|
102
|
241
|
125
|
46
|
|
2024/12
|
60
|
59
|
87
|
84
|
23
|
36
|
37
|
54
|
61
|
23
|
39
|
64
|
69
|
54
|
60
|
63
|
76
|
72
|
75
|
75
|
87
|
73
|
57
|
76
|
85
|
82
|
84
|
125
|
127
|
106
|
89
|
|
2024/11
|
54
|
68
|
62
|
61
|
66
|
63
|
58
|
62
|
78
|
65
|
61
|
60
|
62
|
68
|
68
|
54
|
13
|
11
|
14
|
22
|
37
|
39
|
48
|
36
|
12
|
23
|
36
|
44
|
47
|
54
|
|
|
2024/10
|
17
|
47
|
64
|
55
|
61
|
62
|
43
|
44
|
46
|
57
|
62
|
74
|
63
|
32
|
42
|
34
|
39
|
30
|
18
|
14
|
20
|
15
|
35
|
59
|
53
|
49
|
54
|
54
|
62
|
59
|
59
|
|
2024/09
|
44
|
38
|
54
|
38
|
74
|
59
|
54
|
41
|
36
|
37
|
38
|
43
|
26
|
33
|
41
|
34
|
36
|
43
|
37
|
36
|
40
|
31
|
42
|
49
|
50
|
60
|
63
|
52
|
56
|
65
|
|
|
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