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
18 Apr
Sat
19 Apr
Sun
20 Apr
Mon
21 Apr
Tue
22 Apr
Wed
23 Apr
Thu
24 Apr
Real-time AQI (Monitoring Station in Zhangjiakou)
五金库
243
PM2.5
6
PM10
74
O3
0.6
CO
2
SO2
12
NO2
烟厂
233
PM2.5
12
PM10
73
O3
0.5
CO
2
SO2
8
NO2
Air quality in the last 12 months (Zhangjiakou)
|
2025/02
|
79
|
33
|
17
|
24
|
30
|
55
|
16
|
15
|
25
|
52
|
55
|
39
|
50
|
45
|
69
|
22
|
18
|
17
|
16
|
17
|
15
|
18
|
15
|
35
|
34
|
36
|
65
|
58
|
|||
|
2025/01
|
33
|
25
|
29
|
35
|
39
|
16
|
15
|
13
|
15
|
23
|
39
|
31
|
33
|
24
|
26
|
42
|
43
|
45
|
36
|
42
|
25
|
39
|
62
|
65
|
92
|
125
|
16
|
22
|
56
|
60
|
82
|
|
2024/12
|
36
|
17
|
20
|
18
|
18
|
18
|
14
|
19
|
25
|
28
|
34
|
33
|
32
|
28
|
29
|
29
|
22
|
16
|
34
|
32
|
14
|
22
|
28
|
45
|
55
|
23
|
21
|
44
|
75
|
66
|
37
|
|
2024/11
|
54
|
52
|
34
|
19
|
21
|
29
|
55
|
102
|
159
|
79
|
53
|
49
|
82
|
61
|
44
|
54
|
32
|
33
|
66
|
52
|
24
|
27
|
50
|
99
|
35
|
25
|
19
|
15
|
20
|
45
|
|
|
2024/10
|
12
|
15
|
23
|
38
|
52
|
46
|
15
|
27
|
37
|
28
|
38
|
48
|
81
|
60
|
44
|
49
|
64
|
26
|
17
|
24
|
38
|
18
|
37
|
43
|
65
|
93
|
20
|
30
|
27
|
41
|
64
|
|
2024/09
|
19
|
16
|
21
|
32
|
14
|
20
|
19
|
23
|
31
|
16
|
22
|
19
|
23
|
12
|
20
|
20
|
19
|
37
|
53
|
20
|
11
|
15
|
28
|
36
|
16
|
29
|
56
|
56
|
36
|
13
|
|
|
2024/08
|
21
|
28
|
31
|
30
|
28
|
25
|
35
|
34
|
29
|
46
|
13
|
13
|
16
|
26
|
32
|
37
|
32
|
28
|
27
|
18
|
17
|
18
|
28
|
30
|
26
|
17
|
23
|
27
|
32
|
33
|
44
|
|
2024/07
|
25
|
34
|
28
|
32
|
34
|
26
|
29
|
35
|
56
|
54
|
53
|
46
|
30
|
47
|
52
|
28
|
21
|
25
|
31
|
26
|
46
|
47
|
44
|
37
|
23
|
23
|
37
|
28
|
22
|
24
|
20
|
|
2024/06
|
22
|
25
|
34
|
43
|
48
|
40
|
18
|
31
|
22
|
25
|
30
|
32
|
32
|
22
|
23
|
25
|
33
|
43
|
44
|
53
|
43
|
337
|
129
|
19
|
21
|
47
|
61
|
52
|
51
|
32
|
|
|
2024/05
|
31
|
38
|
47
|
61
|
51
|
41
|
39
|
35
|
58
|
148
|
76
|
31
|
33
|
49
|
24
|
52
|
49
|
67
|
68
|
46
|
53
|
64
|
77
|
48
|
31
|
36
|
25
|
32
|
50
|
38
|
21
|
|
2024/04
|
68
|
74
|
39
|
55
|
56
|
32
|
35
|
59
|
58
|
51
|
46
|
78
|
75
|
75
|
199
|
40
|
39
|
50
|
81
|
28
|
41
|
75
|
27
|
43
|
108
|
88
|
168
|
45
|
24
|
26
|
|
|
2024/03
|
27
|
79
|
38
|
63
|
57
|
16
|
31
|
26
|
40
|
57
|
38
|
26
|
34
|
42
|
76
|
110
|
34
|
200
|
66
|
29
|
65
|
47
|
56
|
53
|
42
|
77
|
186
|
201
|
97
|
34
|
30
|
|
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