Air Quality
Excellent
No health implications.
21
PM2.5
37
PM10
64
O3
0.4
CO
8
SO2
21
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
4 May
99
Good
Mon
5 May
92
Good
Tue
6 May
79
Good
Wed
7 May
78
Good
Thu
8 May
70
Good
Fri
9 May
70
Good
Sat
10 May
16
Excellent
Air quality in the last 12 months (Zhangjiachuan)
|
2025/02
|
94
|
65
|
39
|
47
|
51
|
54
|
85
|
69
|
62
|
53
|
73
|
86
|
68
|
53
|
55
|
76
|
67
|
58
|
76
|
76
|
82
|
67
|
49
|
60
|
62
|
52
|
44
|
51
|
|||
|
2025/01
|
71
|
63
|
79
|
68
|
59
|
64
|
56
|
51
|
57
|
57
|
67
|
67
|
62
|
59
|
52
|
63
|
80
|
69
|
64
|
61
|
73
|
88
|
148
|
166
|
68
|
79
|
74
|
89
|
132
|
104
|
89
|
|
2024/12
|
65
|
68
|
65
|
62
|
55
|
59
|
49
|
55
|
56
|
71
|
69
|
62
|
45
|
53
|
57
|
70
|
65
|
63
|
64
|
66
|
63
|
62
|
60
|
66
|
63
|
73
|
57
|
57
|
66
|
55
|
56
|
|
2024/11
|
45
|
41
|
48
|
52
|
51
|
50
|
62
|
67
|
66
|
57
|
52
|
66
|
61
|
45
|
61
|
50
|
38
|
27
|
38
|
48
|
48
|
51
|
71
|
44
|
46
|
51
|
61
|
63
|
48
|
62
|
|
|
2024/10
|
37
|
31
|
42
|
36
|
52
|
46
|
38
|
54
|
45
|
43
|
46
|
45
|
46
|
43
|
34
|
50
|
46
|
48
|
32
|
28
|
29
|
33
|
44
|
50
|
60
|
53
|
34
|
42
|
49
|
47
|
41
|
|
2024/09
|
42
|
38
|
34
|
37
|
18
|
26
|
18
|
31
|
25
|
27
|
32
|
38
|
26
|
28
|
38
|
35
|
39
|
41
|
37
|
37
|
30
|
37
|
48
|
50
|
30
|
28
|
68
|
79
|
38
|
25
|
|
|
2024/08
|
35
|
40
|
23
|
25
|
25
|
30
|
21
|
25
|
56
|
86
|
51
|
35
|
33
|
36
|
39
|
40
|
34
|
28
|
30
|
31
|
33
|
36
|
42
|
45
|
42
|
26
|
25
|
35
|
39
|
37
|
44
|
|
2024/07
|
32
|
32
|
25
|
26
|
55
|
45
|
21
|
24
|
32
|
32
|
31
|
44
|
29
|
28
|
21
|
18
|
19
|
22
|
25
|
21
|
80
|
25
|
21
|
94
|
74
|
50
|
48
|
40
|
29
|
33
|
33
|
|
2024/06
|
52
|
32
|
33
|
31
|
38
|
37
|
34
|
34
|
28
|
34
|
35
|
40
|
40
|
51
|
53
|
27
|
25
|
28
|
30
|
30
|
24
|
37
|
38
|
36
|
43
|
34
|
22
|
27
|
50
|
39
|
|
|
2024/05
|
34
|
39
|
27
|
33
|
48
|
56
|
54
|
46
|
32
|
61
|
71
|
57
|
51
|
51
|
60
|
54
|
54
|
48
|
36
|
41
|
35
|
42
|
45
|
51
|
46
|
42
|
44
|
53
|
42
|
54
|
64
|
|
2024/04
|
81
|
102
|
69
|
63
|
63
|
50
|
48
|
47
|
46
|
31
|
39
|
43
|
51
|
64
|
106
|
79
|
61
|
56
|
195
|
142
|
70
|
63
|
143
|
82
|
49
|
48
|
42
|
79
|
48
|
34
|
|
|
2024/03
|
47
|
49
|
53
|
63
|
70
|
61
|
108
|
80
|
59
|
63
|
66
|
62
|
54
|
54
|
127
|
200
|
97
|
93
|
92
|
68
|
60
|
67
|
105
|
41
|
44
|
50
|
68
|
54
|
45
|
72
|
56
|
|
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