Air Quality
Excellent
No health implications.
21
PM2.5
41
PM10
127
O3
0.2
CO
5
SO2
7
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
28 Apr
65
Good
Tue
29 Apr
64
Good
Wed
30 Apr
71
Good
Thu
1 May
78
Good
Fri
2 May
79
Good
Sat
3 May
77
Good
Sun
4 May
47
Excellent
Air quality in the last 12 months (Hefeng)
|
2025/02
|
32
|
30
|
38
|
40
|
48
|
56
|
60
|
78
|
60
|
51
|
59
|
73
|
61
|
49
|
41
|
40
|
42
|
40
|
53
|
72
|
82
|
55
|
50
|
77
|
70
|
51
|
50
|
56
|
|||
|
2025/01
|
101
|
117
|
142
|
200
|
73
|
72
|
80
|
66
|
70
|
80
|
94
|
74
|
104
|
104
|
66
|
73
|
87
|
114
|
92
|
91
|
104
|
143
|
169
|
109
|
17
|
35
|
49
|
72
|
134
|
66
|
79
|
|
2024/12
|
55
|
78
|
111
|
62
|
20
|
33
|
41
|
40
|
53
|
58
|
46
|
57
|
77
|
70
|
70
|
64
|
71
|
86
|
85
|
91
|
124
|
83
|
69
|
79
|
108
|
106
|
108
|
101
|
109
|
113
|
85
|
|
2024/11
|
52
|
61
|
63
|
59
|
48
|
48
|
49
|
55
|
49
|
40
|
50
|
75
|
51
|
47
|
50
|
42
|
10
|
9
|
11
|
17
|
19
|
26
|
36
|
32
|
14
|
25
|
25
|
28
|
36
|
43
|
|
|
2024/10
|
14
|
28
|
35
|
34
|
41
|
40
|
21
|
28
|
41
|
47
|
59
|
57
|
32
|
29
|
28
|
35
|
22
|
16
|
19
|
16
|
10
|
18
|
20
|
24
|
33
|
31
|
38
|
37
|
43
|
50
|
50
|
|
2024/09
|
26
|
27
|
35
|
39
|
38
|
32
|
32
|
29
|
27
|
31
|
29
|
27
|
22
|
27
|
30
|
25
|
20
|
20
|
26
|
22
|
22
|
19
|
28
|
30
|
44
|
54
|
58
|
69
|
70
|
41
|
|
|
2024/08
|
13
|
14
|
13
|
13
|
16
|
16
|
17
|
19
|
24
|
25
|
65
|
51
|
32
|
27
|
29
|
28
|
22
|
20
|
17
|
21
|
26
|
25
|
23
|
19
|
21
|
21
|
20
|
17
|
21
|
24
|
23
|
|
2024/07
|
22
|
20
|
19
|
14
|
19
|
16
|
17
|
21
|
23
|
24
|
25
|
18
|
19
|
18
|
19
|
19
|
17
|
17
|
14
|
15
|
14
|
15
|
17
|
19
|
23
|
21
|
15
|
18
|
11
|
13
|
11
|
|
2024/06
|
31
|
32
|
29
|
19
|
11
|
21
|
32
|
29
|
22
|
20
|
25
|
18
|
23
|
32
|
38
|
34
|
20
|
22
|
25
|
21
|
19
|
14
|
22
|
23
|
22
|
21
|
16
|
9
|
15
|
22
|
|
|
2024/05
|
18
|
22
|
15
|
13
|
21
|
33
|
42
|
47
|
51
|
46
|
35
|
48
|
47
|
47
|
47
|
59
|
53
|
47
|
22
|
20
|
35
|
39
|
32
|
34
|
36
|
28
|
23
|
37
|
22
|
15
|
28
|
|
2024/04
|
35
|
24
|
26
|
38
|
32
|
28
|
26
|
27
|
33
|
32
|
32
|
27
|
25
|
31
|
45
|
33
|
15
|
31
|
22
|
41
|
55
|
48
|
36
|
40
|
29
|
34
|
37
|
29
|
29
|
9
|
|
|
2024/03
|
67
|
65
|
56
|
57
|
49
|
56
|
62
|
57
|
66
|
68
|
62
|
60
|
66
|
56
|
61
|
57
|
49
|
29
|
57
|
72
|
66
|
62
|
59
|
39
|
17
|
22
|
30
|
35
|
42
|
36
|
26
|
|
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