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 Oct
Sat
18 Oct
Sun
19 Oct
Mon
20 Oct
Tue
21 Oct
Wed
22 Oct
Thu
23 Oct
Real-time AQI (Monitoring Station in Zhangjiakou)
人民公园
268
PM2.5
8
PM10
82
O3
0.2
CO
4
SO2
5
NO2
五金库
253
PM2.5
10
PM10
80
O3
0.3
CO
9
SO2
6
NO2
世纪豪园
303
PM2.5
6
PM10
93
O3
0.4
CO
10
SO2
6
NO2
烟厂
233
PM2.5
13
PM10
71
O3
0.2
CO
3
SO2
8
NO2
Air quality in the last 12 months (Zhangjiakou)
|
2025/08
|
46
|
44
|
35
|
42
|
31
|
23
|
24
|
25
|
20
|
23
|
34
|
32
|
26
|
34
|
46
|
27
|
31
|
37
|
28
|
29
|
30
|
32
|
27
|
25
|
31
|
28
|
18
|
31
|
40
|
36
|
27
|
|
2025/07
|
26
|
31
|
32
|
32
|
20
|
19
|
25
|
30
|
39
|
37
|
47
|
44
|
20
|
31
|
34
|
15
|
16
|
25
|
42
|
17
|
20
|
27
|
35
|
23
|
24
|
27
|
25
|
29
|
21
|
19
|
30
|
|
2025/06
|
46
|
18
|
16
|
20
|
31
|
20
|
21
|
24
|
32
|
27
|
44
|
67
|
43
|
34
|
15
|
20
|
31
|
40
|
33
|
21
|
22
|
31
|
38
|
40
|
46
|
52
|
46
|
45
|
41
|
32
|
|
|
2025/05
|
21
|
21
|
21
|
24
|
76
|
23
|
49
|
76
|
25
|
36
|
28
|
42
|
42
|
29
|
39
|
92
|
30
|
24
|
24
|
55
|
44
|
45
|
53
|
40
|
38
|
31
|
27
|
38
|
52
|
63
|
28
|
|
2025/04
|
28
|
19
|
44
|
58
|
20
|
43
|
43
|
32
|
31
|
38
|
97
|
50
|
49
|
36
|
33
|
74
|
62
|
18
|
23
|
48
|
67
|
35
|
45
|
20
|
28
|
47
|
19
|
23
|
40
|
27
|
|
|
2025/03
|
69
|
51
|
33
|
38
|
42
|
23
|
39
|
63
|
71
|
96
|
134
|
54
|
63
|
65
|
33
|
19
|
24
|
22
|
22
|
26
|
31
|
51
|
152
|
71
|
53
|
128
|
32
|
24
|
20
|
23
|
24
|
|
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
|
|
|
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