Air Quality
Excellent
No health implications.
PM2.5
PM10
O3
CO
SO2
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
17 May
Mon
18 May
Tue
19 May
Wed
20 May
Thu
21 May
Fri
22 May
Sat
23 May
Real-time AQI (Monitoring Station in Langfang)
开发区
4833
PM2.5
40
PM10
19
O3
0.5
CO
3
SO2
19
NO2
河北工业大学
2316
PM2.5
18
PM10
19
O3
0.5
CO
3
SO2
17
NO2
Air quality in the last 12 months (Langfang)
|
2026/04
|
70
|
81
|
118
|
70
|
51
|
27
|
35
|
69
|
71
|
61
|
69
|
82
|
101
|
80
|
108
|
109
|
80
|
120
|
91
|
93
|
69
|
44
|
61
|
60
|
63
|
60
|
52
|
39
|
34
|
53
|
|
|
2026/03
|
90
|
115
|
141
|
123
|
72
|
60
|
86
|
89
|
34
|
107
|
90
|
96
|
96
|
65
|
63
|
79
|
153
|
50
|
55
|
62
|
111
|
103
|
106
|
167
|
158
|
215
|
62
|
88
|
122
|
35
|
51
|
|
2026/02
|
110
|
24
|
121
|
164
|
85
|
16
|
32
|
39
|
128
|
113
|
71
|
121
|
139
|
138
|
26
|
37
|
154
|
43
|
71
|
90
|
199
|
39
|
34
|
71
|
76
|
86
|
46
|
66
|
|||
|
2026/01
|
34
|
53
|
98
|
133
|
86
|
150
|
24
|
73
|
113
|
38
|
28
|
66
|
35
|
67
|
120
|
69
|
45
|
47
|
26
|
22
|
28
|
73
|
65
|
138
|
72
|
75
|
53
|
64
|
68
|
98
|
82
|
|
2025/12
|
39
|
22
|
44
|
44
|
60
|
136
|
98
|
29
|
88
|
116
|
73
|
42
|
43
|
76
|
157
|
103
|
144
|
215
|
188
|
25
|
35
|
72
|
66
|
30
|
22
|
70
|
79
|
201
|
38
|
34
|
20
|
|
2025/11
|
56
|
22
|
62
|
106
|
198
|
147
|
58
|
67
|
51
|
78
|
132
|
93
|
30
|
92
|
116
|
60
|
20
|
39
|
55
|
36
|
63
|
108
|
143
|
76
|
34
|
81
|
33
|
86
|
112
|
124
|
|
|
2025/10
|
59
|
56
|
56
|
63
|
87
|
24
|
41
|
33
|
11
|
15
|
20
|
42
|
49
|
47
|
80
|
65
|
37
|
17
|
22
|
21
|
33
|
59
|
77
|
104
|
155
|
52
|
42
|
176
|
179
|
168
|
80
|
|
2025/09
|
32
|
51
|
50
|
64
|
58
|
40
|
46
|
37
|
57
|
40
|
62
|
64
|
54
|
48
|
46
|
30
|
20
|
29
|
38
|
44
|
69
|
39
|
53
|
66
|
69
|
63
|
71
|
49
|
52
|
51
|
|
|
2025/08
|
59
|
55
|
36
|
39
|
36
|
56
|
42
|
40
|
30
|
38
|
48
|
54
|
35
|
43
|
45
|
30
|
47
|
45
|
34
|
34
|
39
|
39
|
36
|
21
|
33
|
43
|
32
|
21
|
38
|
33
|
31
|
|
2025/07
|
44
|
43
|
33
|
47
|
44
|
28
|
47
|
42
|
54
|
44
|
54
|
56
|
34
|
48
|
42
|
39
|
35
|
50
|
54
|
31
|
38
|
56
|
41
|
32
|
39
|
53
|
47
|
42
|
18
|
29
|
47
|
|
2025/06
|
75
|
58
|
30
|
29
|
59
|
54
|
55
|
54
|
57
|
43
|
63
|
78
|
69
|
51
|
30
|
24
|
62
|
80
|
44
|
39
|
40
|
47
|
98
|
85
|
75
|
64
|
55
|
49
|
62
|
44
|
|
|
2025/05
|
40
|
53
|
31
|
54
|
62
|
32
|
89
|
92
|
37
|
41
|
65
|
77
|
72
|
43
|
50
|
81
|
72
|
51
|
84
|
119
|
78
|
66
|
61
|
47
|
58
|
70
|
68
|
70
|
74
|
78
|
76
|
|
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