Air Quality
Excellent
No health implications.
6
PM2.5
21
PM10
66
O3
0.2
CO
4
SO2
5
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 Jul
49
Excellent
Tue
22 Jul
56
Good
Wed
23 Jul
55
Good
Thu
24 Jul
51
Good
Fri
25 Jul
50
Excellent
Sat
26 Jul
48
Excellent
Sun
27 Jul
45
Excellent
Air quality in the last 12 months (Tongzhou)
|
2025/06
|
15
|
8
|
40
|
64
|
53
|
39
|
32
|
10
|
16
|
12
|
11
|
11
|
10
|
22
|
15
|
27
|
40
|
37
|
30
|
19
|
19
|
9
|
10
|
13
|
31
|
36
|
28
|
25
|
25
|
21
|
|
|
2025/05
|
54
|
56
|
48
|
25
|
26
|
62
|
54
|
39
|
14
|
33
|
40
|
49
|
44
|
42
|
53
|
17
|
54
|
56
|
51
|
42
|
21
|
28
|
15
|
41
|
51
|
48
|
38
|
45
|
63
|
67
|
54
|
|
2025/04
|
45
|
69
|
50
|
49
|
60
|
59
|
78
|
74
|
95
|
68
|
58
|
96
|
96
|
63
|
56
|
57
|
63
|
58
|
50
|
34
|
36
|
41
|
59
|
71
|
52
|
42
|
40
|
37
|
49
|
55
|
|
|
2025/03
|
49
|
56
|
14
|
9
|
21
|
39
|
55
|
65
|
49
|
30
|
55
|
20
|
39
|
40
|
26
|
44
|
52
|
42
|
43
|
62
|
65
|
63
|
77
|
66
|
94
|
78
|
78
|
44
|
68
|
33
|
35
|
|
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
|
|
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