Air Quality
Excellent
No health implications.
18
PM2.5
29
PM10
89
O3
0.4
CO
10
SO2
28
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 Jun
97
Good
Wed
18 Jun
86
Good
Thu
19 Jun
81
Good
Fri
20 Jun
89
Good
Sat
21 Jun
91
Good
Sun
22 Jun
73
Good
Mon
23 Jun
39
Excellent
Helan Air quality rank
Air quality in the last 12 months (Helan)
|
2025/05
|
77
|
107
|
34
|
79
|
267
|
122
|
99
|
70
|
39
|
33
|
38
|
58
|
78
|
88
|
44
|
112
|
104
|
60
|
52
|
62
|
106
|
101
|
30
|
50
|
42
|
41
|
44
|
59
|
55
|
99
|
47
|
|
2025/04
|
33
|
52
|
134
|
64
|
45
|
114
|
83
|
104
|
49
|
66
|
298
|
109
|
68
|
46
|
127
|
124
|
91
|
59
|
91
|
119
|
137
|
84
|
63
|
44
|
58
|
72
|
51
|
47
|
88
|
167
|
|
|
2025/03
|
87
|
51
|
53
|
77
|
61
|
47
|
84
|
91
|
331
|
153
|
196
|
74
|
88
|
68
|
37
|
29
|
41
|
32
|
38
|
47
|
56
|
80
|
277
|
352
|
412
|
280
|
120
|
72
|
40
|
45
|
37
|
|
2025/02
|
94
|
26
|
26
|
29
|
30
|
78
|
45
|
39
|
68
|
85
|
76
|
58
|
82
|
61
|
55
|
66
|
63
|
57
|
35
|
54
|
68
|
31
|
31
|
55
|
74
|
75
|
68
|
70
|
|||
|
2025/01
|
148
|
67
|
65
|
86
|
60
|
44
|
56
|
44
|
42
|
51
|
59
|
89
|
136
|
31
|
39
|
57
|
80
|
69
|
90
|
111
|
97
|
91
|
90
|
118
|
52
|
37
|
53
|
102
|
296
|
230
|
162
|
|
2024/12
|
59
|
37
|
62
|
51
|
51
|
54
|
36
|
49
|
71
|
51
|
86
|
83
|
54
|
55
|
74
|
125
|
137
|
73
|
66
|
57
|
33
|
55
|
72
|
83
|
88
|
45
|
35
|
62
|
114
|
84
|
110
|
|
2024/11
|
81
|
94
|
58
|
47
|
58
|
81
|
103
|
136
|
102
|
67
|
61
|
65
|
75
|
83
|
80
|
42
|
42
|
50
|
70
|
111
|
91
|
75
|
109
|
57
|
33
|
61
|
58
|
40
|
46
|
58
|
|
|
2024/10
|
45
|
41
|
47
|
35
|
48
|
45
|
39
|
47
|
39
|
56
|
61
|
44
|
58
|
74
|
50
|
64
|
70
|
41
|
36
|
47
|
39
|
32
|
59
|
60
|
60
|
46
|
52
|
69
|
65
|
38
|
58
|
|
2024/09
|
36
|
33
|
41
|
30
|
40
|
35
|
35
|
37
|
47
|
47
|
28
|
38
|
23
|
22
|
24
|
47
|
53
|
66
|
65
|
48
|
23
|
30
|
56
|
53
|
36
|
42
|
70
|
71
|
52
|
49
|
|
|
2024/08
|
38
|
26
|
39
|
39
|
47
|
29
|
22
|
25
|
73
|
82
|
26
|
29
|
25
|
30
|
48
|
42
|
33
|
30
|
27
|
27
|
39
|
35
|
35
|
35
|
32
|
23
|
23
|
31
|
44
|
37
|
50
|
|
2024/07
|
38
|
41
|
35
|
40
|
66
|
56
|
34
|
35
|
46
|
43
|
54
|
54
|
56
|
36
|
31
|
27
|
27
|
33
|
32
|
91
|
166
|
68
|
78
|
202
|
53
|
41
|
37
|
31
|
35
|
50
|
48
|
|
2024/06
|
49
|
28
|
25
|
36
|
39
|
42
|
39
|
45
|
27
|
32
|
50
|
48
|
65
|
34
|
24
|
26
|
40
|
38
|
39
|
38
|
27
|
118
|
85
|
335
|
87
|
52
|
29
|
57
|
37
|
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