Air Quality
Excellent
No health implications.
11
PM2.5
25
PM10
1
O3
0.4
CO
4
SO2
26
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
19 Oct
56
Good
Tue
20 Oct
42
Excellent
Wed
21 Oct
47
Excellent
Thu
22 Oct
81
Good
Fri
23 Oct
127
Light
Sat
24 Oct
102
Light
Sun
25 Oct
19
Excellent
Air quality in the last 12 months (Tongzhou)
|
2026/08
|
33
|
39
|
33
|
30
|
45
|
65
|
40
|
28
|
43
|
56
|
45
|
21
|
17
|
27
|
44
|
22
|
25
|
38
|
44
|
52
|
66
|
38
|
36
|
33
|
43
|
21
|
37
|
23
|
33
|
27
|
25
|
|
2026/07
|
43
|
86
|
75
|
58
|
36
|
43
|
43
|
45
|
62
|
41
|
32
|
27
|
33
|
33
|
54
|
48
|
44
|
36
|
47
|
43
|
43
|
32
|
45
|
48
|
52
|
46
|
46
|
53
|
36
|
39
|
40
|
|
2026/06
|
62
|
94
|
46
|
30
|
25
|
32
|
19
|
32
|
27
|
44
|
27
|
61
|
53
|
36
|
69
|
39
|
38
|
72
|
77
|
31
|
32
|
56
|
50
|
66
|
33
|
43
|
60
|
82
|
59
|
46
|
|
|
2026/05
|
69
|
49
|
28
|
53
|
61
|
56
|
43
|
52
|
68
|
61
|
63
|
80
|
96
|
83
|
65
|
53
|
27
|
25
|
41
|
33
|
35
|
43
|
34
|
79
|
42
|
29
|
47
|
30
|
39
|
56
|
72
|
|
2026/04
|
53
|
78
|
107
|
67
|
41
|
30
|
33
|
73
|
66
|
56
|
67
|
83
|
92
|
83
|
101
|
98
|
74
|
122
|
84
|
100
|
72
|
54
|
60
|
64
|
73
|
57
|
49
|
41
|
33
|
54
|
|
|
2026/03
|
84
|
122
|
105
|
72
|
71
|
46
|
85
|
67
|
32
|
89
|
66
|
97
|
86
|
47
|
57
|
73
|
154
|
37
|
57
|
61
|
92
|
109
|
107
|
165
|
176
|
199
|
34
|
78
|
84
|
28
|
54
|
|
2026/02
|
47
|
26
|
83
|
104
|
64
|
10
|
18
|
34
|
91
|
98
|
43
|
83
|
90
|
100
|
15
|
23
|
75
|
30
|
67
|
91
|
165
|
47
|
33
|
70
|
103
|
79
|
38
|
75
|
|||
|
2026/01
|
29
|
43
|
51
|
83
|
46
|
46
|
28
|
63
|
94
|
37
|
33
|
66
|
33
|
60
|
99
|
50
|
27
|
42
|
21
|
20
|
27
|
50
|
47
|
57
|
48
|
66
|
37
|
66
|
65
|
110
|
83
|
|
2025/12
|
31
|
24
|
32
|
37
|
60
|
94
|
58
|
34
|
71
|
84
|
72
|
41
|
36
|
50
|
92
|
67
|
110
|
196
|
149
|
16
|
33
|
70
|
53
|
26
|
26
|
66
|
67
|
141
|
35
|
27
|
21
|
|
2025/11
|
63
|
15
|
57
|
83
|
191
|
153
|
84
|
64
|
31
|
64
|
104
|
67
|
22
|
66
|
85
|
31
|
21
|
29
|
49
|
29
|
60
|
73
|
94
|
63
|
34
|
73
|
30
|
81
|
99
|
99
|
|
|
2025/10
|
49
|
56
|
47
|
57
|
55
|
23
|
51
|
26
|
9
|
13
|
21
|
42
|
54
|
51
|
82
|
71
|
35
|
10
|
16
|
19
|
32
|
58
|
66
|
99
|
138
|
35
|
40
|
128
|
180
|
152
|
61
|
|
2025/09
|
26
|
45
|
47
|
66
|
56
|
26
|
40
|
31
|
57
|
40
|
59
|
73
|
53
|
37
|
31
|
23
|
18
|
29
|
40
|
44
|
57
|
36
|
50
|
63
|
50
|
55
|
57
|
43
|
41
|
42
|
|
|
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