Air Quality
Excellent
No health implications.
11
PM2.5
18
PM10
59
O3
0.2
CO
2
SO2
5
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
11 May
71
Good
Mon
12 May
75
Good
Tue
13 May
80
Good
Wed
14 May
60
Good
Thu
15 May
48
Excellent
Fri
16 May
61
Good
Sat
17 May
41
Excellent
Air quality in the last 12 months (Hecheng)
|
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
|
|
|
2024/08
|
12
|
16
|
15
|
22
|
24
|
23
|
27
|
25
|
26
|
26
|
18
|
47
|
43
|
49
|
49
|
42
|
45
|
44
|
28
|
36
|
35
|
21
|
18
|
16
|
21
|
22
|
26
|
29
|
41
|
42
|
52
|
|
2024/07
|
17
|
14
|
18
|
16
|
16
|
13
|
15
|
15
|
16
|
19
|
22
|
21
|
21
|
17
|
22
|
18
|
18
|
17
|
10
|
15
|
24
|
23
|
24
|
28
|
29
|
32
|
33
|
19
|
12
|
16
|
19
|
|
2024/06
|
38
|
28
|
29
|
13
|
16
|
28
|
30
|
13
|
13
|
16
|
17
|
21
|
22
|
23
|
32
|
35
|
18
|
11
|
19
|
26
|
23
|
19
|
16
|
16
|
16
|
19
|
11
|
19
|
13
|
14
|
|
|
2024/05
|
18
|
27
|
12
|
13
|
22
|
37
|
49
|
55
|
44
|
36
|
23
|
53
|
55
|
61
|
64
|
75
|
53
|
29
|
14
|
13
|
33
|
45
|
44
|
38
|
41
|
25
|
21
|
45
|
24
|
10
|
30
|
|
2024/04
|
29
|
35
|
20
|
35
|
30
|
32
|
37
|
42
|
37
|
38
|
37
|
36
|
38
|
32
|
51
|
36
|
23
|
39
|
24
|
30
|
49
|
51
|
39
|
48
|
28
|
40
|
33
|
34
|
26
|
13
|
|
|
2024/03
|
83
|
51
|
50
|
24
|
22
|
79
|
83
|
64
|
57
|
55
|
49
|
54
|
44
|
52
|
38
|
33
|
25
|
21
|
46
|
78
|
70
|
48
|
33
|
45
|
19
|
26
|
36
|
25
|
41
|
45
|
33
|
|
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