Air Quality
Excellent
No health implications.
3
PM2.5
8
PM10
37
O3
0.5
CO
6
SO2
12
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
20 Sep
40
Excellent
Sat
21 Sep
39
Excellent
Sun
22 Sep
44
Excellent
Mon
23 Sep
45
Excellent
Tue
24 Sep
51
Good
Wed
25 Sep
51
Good
Thu
26 Sep
51
Good
Air quality in the last 12 months (Tongzhou)
|
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
|
|
2024/02
|
27
|
25
|
24
|
30
|
53
|
66
|
48
|
91
|
143
|
181
|
177
|
99
|
56
|
72
|
56
|
30
|
29
|
34
|
42
|
26
|
20
|
35
|
44
|
55
|
101
|
84
|
49
|
39
|
27
|
||
|
2024/01
|
92
|
63
|
97
|
144
|
142
|
143
|
50
|
36
|
95
|
88
|
105
|
149
|
203
|
131
|
33
|
31
|
51
|
41
|
49
|
40
|
53
|
39
|
36
|
45
|
70
|
108
|
131
|
131
|
134
|
40
|
26
|
|
2023/12
|
46
|
60
|
85
|
93
|
121
|
113
|
114
|
77
|
113
|
36
|
21
|
50
|
56
|
79
|
40
|
47
|
29
|
30
|
31
|
66
|
42
|
43
|
63
|
87
|
103
|
131
|
78
|
94
|
58
|
131
|
196
|
|
2023/11
|
58
|
45
|
61
|
41
|
25
|
40
|
53
|
56
|
86
|
34
|
32
|
44
|
43
|
69
|
89
|
98
|
91
|
54
|
67
|
92
|
99
|
82
|
112
|
45
|
32
|
45
|
103
|
87
|
76
|
36
|
|
|
2023/10
|
35
|
30
|
28
|
29
|
41
|
28
|
27
|
26
|
46
|
50
|
35
|
39
|
36
|
74
|
96
|
85
|
55
|
67
|
71
|
30
|
38
|
50
|
38
|
44
|
64
|
90
|
65
|
39
|
48
|
42
|
48
|
|
2023/09
|
29
|
39
|
34
|
19
|
19
|
21
|
36
|
33
|
33
|
35
|
43
|
27
|
27
|
27
|
24
|
22
|
34
|
50
|
45
|
27
|
30
|
29
|
27
|
28
|
34
|
34
|
42
|
39
|
49
|
34
|
|
|
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