Air Quality
Excellent
No health implications.
23
PM2.5
35
PM10
64
O3
0.3
CO
3
SO2
13
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 May
53
Good
Mon
18 May
62
Good
Tue
19 May
74
Good
Wed
20 May
79
Good
Thu
21 May
86
Good
Fri
22 May
84
Good
Sat
23 May
23
Excellent
Air quality in the last 12 months (Zhengding)
|
2026/04
|
74
|
101
|
127
|
58
|
94
|
52
|
54
|
68
|
67
|
68
|
67
|
89
|
114
|
88
|
90
|
86
|
97
|
110
|
81
|
65
|
70
|
55
|
60
|
60
|
63
|
65
|
71
|
52
|
50
|
59
|
|
|
2026/03
|
87
|
113
|
144
|
104
|
75
|
70
|
73
|
114
|
80
|
118
|
114
|
127
|
175
|
102
|
52
|
52
|
114
|
61
|
62
|
88
|
100
|
58
|
102
|
137
|
108
|
137
|
108
|
100
|
76
|
56
|
53
|
|
2026/02
|
148
|
144
|
150
|
130
|
93
|
55
|
51
|
64
|
119
|
136
|
93
|
91
|
102
|
118
|
50
|
52
|
69
|
41
|
47
|
75
|
235
|
176
|
50
|
74
|
71
|
88
|
64
|
70
|
|||
|
2026/01
|
71
|
106
|
168
|
205
|
136
|
62
|
54
|
69
|
133
|
59
|
49
|
72
|
83
|
92
|
154
|
120
|
66
|
57
|
51
|
56
|
62
|
91
|
160
|
212
|
161
|
169
|
235
|
180
|
106
|
119
|
194
|
|
2025/12
|
83
|
45
|
54
|
61
|
81
|
97
|
88
|
53
|
77
|
114
|
116
|
36
|
49
|
69
|
122
|
109
|
113
|
157
|
222
|
136
|
67
|
82
|
83
|
72
|
43
|
74
|
101
|
156
|
136
|
80
|
42
|
|
2025/11
|
52
|
42
|
66
|
105
|
166
|
219
|
75
|
69
|
63
|
74
|
98
|
119
|
61
|
64
|
72
|
64
|
37
|
42
|
47
|
56
|
53
|
58
|
82
|
112
|
45
|
131
|
55
|
92
|
125
|
147
|
|
|
2025/10
|
64
|
34
|
56
|
60
|
41
|
24
|
32
|
27
|
15
|
16
|
26
|
49
|
38
|
38
|
72
|
106
|
45
|
30
|
50
|
36
|
50
|
60
|
88
|
108
|
151
|
72
|
65
|
93
|
182
|
204
|
161
|
|
2025/09
|
49
|
53
|
41
|
40
|
40
|
47
|
57
|
57
|
41
|
49
|
50
|
42
|
48
|
59
|
69
|
45
|
29
|
39
|
27
|
44
|
60
|
23
|
33
|
45
|
54
|
57
|
40
|
51
|
59
|
61
|
|
|
2025/08
|
48
|
56
|
57
|
32
|
32
|
44
|
45
|
32
|
26
|
36
|
47
|
52
|
33
|
50
|
62
|
24
|
33
|
50
|
52
|
21
|
34
|
35
|
26
|
17
|
38
|
45
|
51
|
27
|
41
|
37
|
43
|
|
2025/07
|
38
|
36
|
21
|
41
|
28
|
32
|
36
|
45
|
45
|
47
|
55
|
59
|
42
|
52
|
63
|
61
|
47
|
43
|
48
|
34
|
34
|
44
|
32
|
35
|
39
|
47
|
40
|
46
|
19
|
31
|
43
|
|
2025/06
|
92
|
81
|
43
|
39
|
62
|
69
|
69
|
62
|
71
|
49
|
76
|
78
|
78
|
49
|
32
|
29
|
41
|
66
|
51
|
60
|
51
|
47
|
52
|
51
|
56
|
48
|
51
|
42
|
42
|
55
|
|
|
2025/05
|
53
|
72
|
47
|
63
|
85
|
53
|
72
|
91
|
34
|
38
|
50
|
62
|
77
|
53
|
51
|
65
|
124
|
66
|
84
|
92
|
81
|
69
|
68
|
44
|
54
|
61
|
67
|
62
|
67
|
69
|
69
|
|
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