Air Quality
Excellent
No health implications.
10
PM2.5
24
PM10
39
O3
0.4
CO
4
SO2
33
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
5 Jan
45
Excellent
Tue
6 Jan
57
Good
Wed
7 Jan
49
Excellent
Thu
8 Jan
77
Good
Fri
9 Jan
61
Good
Sat
10 Jan
44
Excellent
Sun
11 Jan
26
Excellent
Air quality in the last 12 months (Tongzhou)
|
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
|
|
|
2025/08
|
56
|
58
|
28
|
35
|
30
|
45
|
24
|
38
|
13
|
33
|
39
|
51
|
20
|
33
|
43
|
22
|
39
|
37
|
27
|
28
|
28
|
26
|
26
|
15
|
35
|
33
|
25
|
15
|
45
|
33
|
26
|
|
2025/07
|
38
|
39
|
24
|
42
|
32
|
13
|
37
|
35
|
51
|
28
|
52
|
61
|
19
|
44
|
48
|
32
|
21
|
43
|
52
|
22
|
32
|
58
|
37
|
24
|
31
|
45
|
43
|
26
|
12
|
21
|
45
|
|
2025/06
|
60
|
25
|
16
|
33
|
55
|
36
|
34
|
49
|
47
|
35
|
58
|
72
|
63
|
53
|
20
|
20
|
49
|
63
|
41
|
24
|
20
|
43
|
61
|
72
|
61
|
60
|
61
|
52
|
77
|
55
|
|
|
2025/05
|
39
|
49
|
29
|
54
|
59
|
17
|
85
|
98
|
33
|
43
|
64
|
89
|
91
|
32
|
44
|
80
|
52
|
54
|
63
|
105
|
77
|
72
|
52
|
35
|
58
|
63
|
49
|
67
|
64
|
72
|
81
|
|
2025/04
|
50
|
22
|
62
|
77
|
24
|
76
|
60
|
37
|
58
|
89
|
123
|
147
|
88
|
56
|
56
|
96
|
62
|
27
|
42
|
70
|
96
|
28
|
61
|
37
|
59
|
103
|
38
|
70
|
69
|
65
|
|
|
2025/03
|
236
|
75
|
35
|
50
|
85
|
18
|
77
|
115
|
162
|
133
|
194
|
71
|
105
|
69
|
50
|
20
|
34
|
35
|
47
|
36
|
33
|
49
|
107
|
89
|
65
|
81
|
54
|
34
|
29
|
48
|
68
|
|
2025/02
|
66
|
53
|
10
|
16
|
25
|
67
|
38
|
16
|
16
|
80
|
143
|
30
|
75
|
66
|
110
|
30
|
18
|
37
|
23
|
31
|
17
|
21
|
26
|
51
|
59
|
67
|
126
|
148
|
|||
|
2025/01
|
55
|
30
|
41
|
62
|
58
|
19
|
24
|
29
|
20
|
24
|
31
|
41
|
63
|
47
|
35
|
52
|
76
|
95
|
41
|
74
|
52
|
60
|
88
|
120
|
133
|
108
|
28
|
22
|
151
|
70
|
76
|
|
2024/12
|
68
|
15
|
39
|
44
|
23
|
36
|
28
|
33
|
51
|
37
|
45
|
69
|
33
|
39
|
40
|
39
|
17
|
18
|
55
|
55
|
26
|
30
|
39
|
86
|
93
|
33
|
31
|
46
|
76
|
81
|
50
|
|
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