Air Quality
Excellent
No health implications.
20
PM2.5
43
PM10
83
O3
1.2
CO
25
SO2
27
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
20 Apr
64
Good
Sun
21 Apr
102
Lightly
Mon
22 Apr
202
Heavily
Tue
23 Apr
79
Good
Wed
24 Apr
100
Good
Thu
25 Apr
269
Heavily
Fri
26 Apr
268
Heavily
Air quality in the last 12 months (Guyang)
|
2024/02
|
45
|
106
|
63
|
88
|
75
|
25
|
113
|
148
|
161
|
255
|
109
|
104
|
87
|
37
|
42
|
69
|
86
|
166
|
94
|
59
|
38
|
33
|
49
|
82
|
81
|
77
|
101
|
46
|
27
|
||
|
2024/01
|
220
|
97
|
72
|
69
|
53
|
32
|
67
|
135
|
56
|
97
|
162
|
185
|
129
|
34
|
73
|
99
|
159
|
191
|
141
|
29
|
23
|
27
|
54
|
94
|
153
|
213
|
167
|
177
|
154
|
125
|
44
|
|
2023/12
|
47
|
76
|
90
|
95
|
144
|
316
|
169
|
134
|
74
|
74
|
81
|
115
|
91
|
62
|
35
|
24
|
64
|
116
|
28
|
33
|
39
|
78
|
71
|
135
|
184
|
167
|
217
|
199
|
250
|
115
|
62
|
|
2023/11
|
83
|
157
|
90
|
103
|
68
|
38
|
62
|
44
|
22
|
24
|
25
|
27
|
58
|
95
|
107
|
50
|
45
|
77
|
91
|
105
|
101
|
103
|
34
|
66
|
81
|
85
|
38
|
41
|
29
|
42
|
|
|
2023/10
|
53
|
51
|
46
|
28
|
49
|
48
|
42
|
28
|
35
|
55
|
56
|
48
|
40
|
60
|
49
|
58
|
76
|
47
|
33
|
33
|
60
|
87
|
93
|
86
|
83
|
58
|
78
|
84
|
82
|
81
|
98
|
|
2023/09
|
52
|
45
|
54
|
55
|
57
|
55
|
69
|
45
|
48
|
58
|
28
|
32
|
38
|
61
|
43
|
38
|
37
|
50
|
27
|
33
|
44
|
45
|
45
|
39
|
51
|
59
|
35
|
50
|
45
|
35
|
|
|
2023/08
|
33
|
41
|
49
|
36
|
58
|
51
|
49
|
58
|
56
|
56
|
42
|
33
|
39
|
60
|
63
|
67
|
134
|
52
|
40
|
62
|
50
|
36
|
27
|
33
|
41
|
38
|
40
|
44
|
31
|
36
|
40
|
|
2023/07
|
61
|
51
|
59
|
51
|
83
|
52
|
32
|
30
|
42
|
55
|
48
|
36
|
56
|
61
|
28
|
43
|
75
|
66
|
73
|
53
|
43
|
37
|
46
|
58
|
60
|
41
|
59
|
39
|
49
|
39
|
18
|
|
2023/06
|
76
|
29
|
36
|
31
|
31
|
38
|
53
|
32
|
39
|
38
|
34
|
67
|
41
|
67
|
73
|
69
|
61
|
44
|
61
|
32
|
55
|
74
|
64
|
58
|
51
|
55
|
62
|
40
|
41
|
60
|
|
|
2023/05
|
87
|
90
|
78
|
47
|
28
|
29
|
33
|
48
|
58
|
52
|
63
|
55
|
47
|
73
|
69
|
190
|
51
|
44
|
223
|
124
|
45
|
31
|
52
|
172
|
66
|
53
|
61
|
60
|
48
|
44
|
68
|
|
2023/04
|
85
|
104
|
53
|
25
|
29
|
39
|
33
|
60
|
223
|
416
|
297
|
121
|
196
|
177
|
63
|
72
|
179
|
135
|
232
|
53
|
33
|
51
|
58
|
27
|
38
|
115
|
235
|
130
|
62
|
38
|
|
|
2023/03
|
43
|
49
|
58
|
60
|
90
|
82
|
81
|
68
|
101
|
221
|
115
|
60
|
86
|
83
|
47
|
77
|
64
|
40
|
63
|
66
|
350
|
458
|
111
|
79
|
76
|
72
|
56
|
68
|
57
|
68
|
81
|
|
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