Air Quality
Good
Some pollutants may slightly affect very few hypersensitive individuals.
24
PM2.5
48
PM10
169
O3
0.8
CO
6
SO2
25
NO2
Some pollutants may slightly affect very few hypersensitive individuals.
Advise
Only very few hypersensitive people should reduce outdoor activities.
Air Quality
Today
19 May
121
Light
Tue
20 May
112
Light
Wed
21 May
99
Good
Thu
22 May
83
Good
Fri
23 May
69
Good
Sat
24 May
77
Good
Sun
25 May
35
Excellent
Air quality in the last 12 months (Tongzhou)
|
2025/02
|
22
|
57
|
75
|
58
|
54
|
39
|
52
|
33
|
47
|
53
|
35
|
84
|
48
|
38
|
76
|
131
|
67
|
44
|
41
|
27
|
31
|
51
|
41
|
61
|
88
|
124
|
154
|
56
|
|||
|
2025/01
|
60
|
42
|
46
|
39
|
92
|
95
|
65
|
66
|
34
|
35
|
67
|
86
|
85
|
111
|
50
|
66
|
80
|
79
|
114
|
169
|
94
|
42
|
36
|
35
|
32
|
44
|
62
|
90
|
145
|
52
|
48
|
|
2024/12
|
73
|
90
|
53
|
33
|
87
|
147
|
134
|
37
|
46
|
37
|
73
|
44
|
68
|
58
|
65
|
82
|
98
|
71
|
39
|
63
|
92
|
43
|
42
|
59
|
93
|
111
|
52
|
60
|
77
|
83
|
78
|
|
2024/11
|
9
|
49
|
56
|
51
|
32
|
27
|
28
|
27
|
30
|
37
|
42
|
45
|
41
|
34
|
52
|
22
|
33
|
26
|
24
|
31
|
71
|
75
|
27
|
27
|
26
|
47
|
71
|
71
|
50
|
72
|
|
|
2024/10
|
18
|
27
|
18
|
22
|
16
|
8
|
10
|
36
|
35
|
52
|
71
|
59
|
26
|
19
|
47
|
36
|
28
|
34
|
25
|
26
|
21
|
30
|
43
|
28
|
29
|
22
|
18
|
44
|
27
|
24
|
21
|
|
2024/09
|
34
|
35
|
17
|
18
|
21
|
23
|
41
|
26
|
18
|
25
|
11
|
18
|
18
|
14
|
18
|
19
|
17
|
15
|
16
|
9
|
18
|
26
|
21
|
23
|
16
|
11
|
23
|
25
|
30
|
32
|
|
|
2024/08
|
32
|
32
|
41
|
29
|
32
|
25
|
30
|
32
|
28
|
39
|
37
|
33
|
40
|
18
|
18
|
26
|
20
|
14
|
12
|
22
|
25
|
44
|
38
|
24
|
18
|
16
|
27
|
24
|
16
|
18
|
22
|
|
2024/07
|
26
|
32
|
29
|
33
|
29
|
42
|
39
|
43
|
40
|
13
|
19
|
17
|
19
|
27
|
51
|
44
|
39
|
32
|
37
|
37
|
36
|
37
|
26
|
19
|
21
|
24
|
26
|
21
|
21
|
21
|
31
|
|
2024/06
|
58
|
33
|
48
|
43
|
28
|
23
|
25
|
23
|
41
|
35
|
15
|
20
|
38
|
29
|
27
|
27
|
16
|
26
|
16
|
24
|
35
|
19
|
32
|
39
|
38
|
17
|
23
|
27
|
28
|
12
|
|
|
2024/05
|
41
|
43
|
33
|
38
|
31
|
61
|
56
|
45
|
28
|
39
|
40
|
87
|
70
|
51
|
53
|
43
|
45
|
38
|
30
|
24
|
25
|
36
|
27
|
21
|
27
|
31
|
25
|
30
|
35
|
26
|
39
|
|
2024/04
|
69
|
32
|
32
|
64
|
44
|
50
|
46
|
45
|
64
|
61
|
50
|
28
|
19
|
23
|
38
|
44
|
58
|
89
|
88
|
34
|
23
|
26
|
46
|
49
|
47
|
30
|
20
|
19
|
26
|
44
|
|
|
2024/03
|
43
|
62
|
78
|
38
|
27
|
58
|
52
|
79
|
90
|
47
|
63
|
100
|
67
|
52
|
42
|
49
|
73
|
45
|
102
|
90
|
60
|
70
|
66
|
44
|
35
|
41
|
48
|
69
|
68
|
79
|
91
|
|
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