Air Quality
Severe
Healthy people will experience reduced endurance in activities and may also show noticeably strong symptoms. Other illnesses may be triggered in healthy people. Elders and the sick should remain indoors and avoid exercise. Healthy individuals should avoid outdoor activities.
PM2.5
PM10
O3
CO
SO2
NO2
Healthy people will experience reduced endurance in activities and may also show noticeably strong symptoms. Other illnesses may be triggered in healthy people. Elders and the sick should remain indoors and avoid exercise. Healthy individuals should avoid outdoor activities.
Advise
Children, seniors and the sick should stay indoors and avoid physical exertion. General population should avoid outdoor activities.
Air Quality
Today
22 May
Fri
23 May
Sat
24 May
Sun
25 May
Mon
26 May
Tue
27 May
Wed
28 May
Air quality in the last 12 months (Helan)
|
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
|
|
|
2024/05
|
39
|
39
|
24
|
35
|
41
|
52
|
33
|
55
|
31
|
118
|
86
|
34
|
43
|
135
|
56
|
72
|
81
|
76
|
173
|
66
|
60
|
49
|
50
|
83
|
63
|
40
|
37
|
41
|
62
|
41
|
35
|
|
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
*: primary pollution