Air Quality
Excellent
No health implications.
20
PM2.5
50
PM10
60
O3
0.3
CO
4
SO2
10
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
3 Mar
54
Good
Tue
4 Mar
66
Good
Wed
5 Mar
81
Good
Thu
6 Mar
81
Good
Fri
7 Mar
90
Good
Sat
8 Mar
90
Good
Sun
9 Mar
26
Excellent
Air quality in the last 12 months (Guoyang)
|
2025/01
|
108
|
179
|
125
|
152
|
139
|
76
|
63
|
66
|
48
|
61
|
76
|
71
|
96
|
143
|
58
|
69
|
95
|
106
|
133
|
132
|
149
|
196
|
102
|
65
|
52
|
82
|
45
|
87
|
218
|
99
|
134
|
|
2024/12
|
75
|
103
|
65
|
91
|
127
|
123
|
120
|
50
|
64
|
85
|
104
|
100
|
103
|
79
|
67
|
79
|
96
|
62
|
60
|
98
|
80
|
60
|
87
|
115
|
132
|
164
|
106
|
74
|
64
|
92
|
113
|
|
2024/11
|
116
|
112
|
100
|
85
|
61
|
76
|
55
|
49
|
57
|
71
|
57
|
70
|
74
|
78
|
85
|
66
|
40
|
36
|
34
|
43
|
58
|
83
|
51
|
48
|
47
|
49
|
67
|
59
|
53
|
69
|
|
|
2024/10
|
35
|
47
|
47
|
52
|
43
|
38
|
24
|
57
|
59
|
83
|
94
|
86
|
81
|
86
|
95
|
80
|
44
|
20
|
39
|
42
|
59
|
68
|
70
|
56
|
62
|
66
|
115
|
122
|
115
|
85
|
71
|
|
2024/09
|
41
|
41
|
34
|
40
|
51
|
34
|
41
|
39
|
31
|
38
|
49
|
23
|
35
|
52
|
30
|
47
|
23
|
20
|
20
|
24
|
29
|
30
|
41
|
48
|
51
|
53
|
47
|
42
|
41
|
42
|
|
|
2024/08
|
19
|
17
|
23
|
26
|
25
|
15
|
21
|
26
|
35
|
52
|
94
|
44
|
47
|
40
|
31
|
30
|
29
|
35
|
26
|
28
|
38
|
42
|
38
|
44
|
46
|
40
|
14
|
25
|
30
|
32
|
35
|
|
2024/07
|
29
|
30
|
28
|
10
|
20
|
15
|
22
|
26
|
16
|
50
|
47
|
33
|
25
|
21
|
14
|
28
|
19
|
15
|
19
|
16
|
21
|
24
|
27
|
34
|
26
|
20
|
15
|
14
|
12
|
17
|
21
|
|
2024/06
|
60
|
65
|
75
|
73
|
69
|
55
|
46
|
59
|
64
|
51
|
37
|
43
|
50
|
52
|
59
|
55
|
47
|
46
|
47
|
48
|
28
|
40
|
43
|
77
|
85
|
50
|
55
|
22
|
19
|
25
|
|
|
2024/05
|
49
|
50
|
48
|
49
|
55
|
52
|
56
|
48
|
51
|
55
|
109
|
122
|
96
|
71
|
74
|
58
|
64
|
62
|
58
|
55
|
46
|
44
|
47
|
56
|
53
|
62
|
51
|
47
|
59
|
59
|
95
|
|
2024/04
|
81
|
99
|
76
|
48
|
54
|
56
|
66
|
59
|
55
|
67
|
54
|
64
|
65
|
52
|
47
|
71
|
82
|
70
|
67
|
76
|
75
|
63
|
106
|
91
|
73
|
72
|
56
|
36
|
51
|
59
|
|
|
2024/03
|
69
|
72
|
71
|
87
|
108
|
96
|
108
|
66
|
57
|
97
|
92
|
86
|
84
|
69
|
75
|
98
|
143
|
61
|
102
|
106
|
82
|
68
|
73
|
53
|
53
|
59
|
65
|
66
|
57
|
73
|
86
|
|
2024/02
|
59
|
47
|
100
|
88
|
83
|
136
|
161
|
184
|
158
|
238
|
163
|
74
|
69
|
79
|
51
|
44
|
46
|
51
|
62
|
24
|
40
|
43
|
42
|
91
|
160
|
92
|
62
|
74
|
70
|
||
|
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