Air Quality
Excellent
No health implications.
12
PM2.5
32
PM10
63
O3
0.4
CO
4
SO2
11
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
5 May
158
Moderate
Tue
6 May
109
Light
Wed
7 May
81
Good
Thu
8 May
78
Good
Fri
9 May
72
Good
Sat
10 May
75
Good
Sun
11 May
82
Good
Air quality in the last 12 months (Hejin)
|
2025/02
|
165
|
127
|
34
|
49
|
39
|
87
|
57
|
38
|
64
|
83
|
85
|
80
|
78
|
88
|
92
|
77
|
78
|
88
|
79
|
83
|
103
|
105
|
61
|
62
|
75
|
70
|
77
|
87
|
|||
|
2025/01
|
131
|
88
|
90
|
120
|
115
|
58
|
61
|
61
|
56
|
78
|
79
|
67
|
97
|
76
|
41
|
66
|
109
|
116
|
118
|
126
|
140
|
144
|
146
|
106
|
57
|
74
|
35
|
79
|
172
|
139
|
169
|
|
2024/12
|
81
|
73
|
64
|
78
|
64
|
72
|
55
|
59
|
80
|
96
|
95
|
113
|
68
|
60
|
74
|
91
|
107
|
78
|
71
|
88
|
46
|
76
|
109
|
136
|
145
|
98
|
61
|
62
|
90
|
101
|
91
|
|
2024/11
|
90
|
84
|
88
|
68
|
69
|
72
|
84
|
83
|
76
|
111
|
115
|
124
|
63
|
54
|
73
|
67
|
46
|
49
|
49
|
67
|
80
|
102
|
105
|
105
|
47
|
46
|
71
|
55
|
51
|
65
|
|
|
2024/10
|
70
|
58
|
56
|
59
|
65
|
86
|
90
|
80
|
104
|
71
|
72
|
69
|
65
|
97
|
82
|
113
|
65
|
42
|
30
|
24
|
41
|
34
|
54
|
64
|
66
|
74
|
60
|
68
|
81
|
75
|
84
|
|
2024/09
|
53
|
46
|
40
|
45
|
37
|
39
|
39
|
48
|
46
|
51
|
43
|
35
|
48
|
40
|
46
|
37
|
41
|
52
|
37
|
38
|
27
|
48
|
52
|
72
|
100
|
77
|
81
|
61
|
38
|
21
|
|
|
2024/08
|
50
|
47
|
33
|
35
|
39
|
40
|
27
|
38
|
41
|
111
|
46
|
41
|
47
|
41
|
41
|
50
|
46
|
40
|
37
|
40
|
37
|
50
|
52
|
54
|
45
|
19
|
23
|
35
|
40
|
41
|
41
|
|
2024/07
|
33
|
48
|
45
|
44
|
33
|
41
|
43
|
33
|
40
|
50
|
55
|
50
|
57
|
58
|
46
|
40
|
37
|
27
|
37
|
23
|
34
|
40
|
44
|
43
|
65
|
56
|
48
|
54
|
35
|
21
|
42
|
|
2024/06
|
69
|
54
|
59
|
53
|
35
|
54
|
63
|
70
|
71
|
64
|
92
|
80
|
69
|
59
|
65
|
57
|
44
|
43
|
43
|
47
|
40
|
59
|
71
|
109
|
96
|
88
|
66
|
64
|
60
|
60
|
|
|
2024/05
|
45
|
47
|
48
|
47
|
58
|
46
|
61
|
61
|
65
|
55
|
145
|
73
|
73
|
68
|
82
|
60
|
79
|
76
|
54
|
62
|
63
|
64
|
60
|
69
|
76
|
64
|
58
|
55
|
50
|
59
|
83
|
|
2024/04
|
67
|
69
|
61
|
71
|
65
|
81
|
83
|
68
|
63
|
62
|
58
|
57
|
56
|
47
|
87
|
81
|
80
|
74
|
62
|
68
|
89
|
91
|
143
|
89
|
90
|
72
|
67
|
66
|
58
|
39
|
|
|
2024/03
|
53
|
63
|
70
|
70
|
133
|
85
|
85
|
60
|
75
|
93
|
83
|
70
|
90
|
88
|
70
|
210
|
108
|
101
|
130
|
90
|
83
|
122
|
102
|
44
|
47
|
66
|
70
|
88
|
85
|
79
|
86
|
|
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