Air Quality
Excellent
No health implications.
30
PM2.5
41
PM10
52
O3
1.1
CO
7
SO2
17
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
15 Jan
99
Good
Fri
16 Jan
133
Light
Sat
17 Jan
103
Light
Sun
18 Jan
88
Good
Mon
19 Jan
61
Good
Tue
20 Jan
30
Excellent
Wed
21 Jan
42
Excellent
Air quality in the last 12 months (Longtan)
|
2025/11
|
50
|
37
|
44
|
56
|
93
|
98
|
43
|
60
|
37
|
46
|
146
|
91
|
52
|
133
|
139
|
59
|
132
|
48
|
35
|
41
|
49
|
55
|
118
|
321
|
500
|
277
|
66
|
42
|
41
|
50
|
|
|
2025/10
|
38
|
52
|
38
|
32
|
24
|
23
|
26
|
32
|
43
|
43
|
28
|
44
|
132
|
232
|
67
|
60
|
85
|
34
|
25
|
27
|
37
|
47
|
70
|
70
|
73
|
44
|
35
|
74
|
146
|
52
|
46
|
|
2025/09
|
22
|
26
|
27
|
32
|
33
|
22
|
20
|
19
|
22
|
26
|
26
|
34
|
50
|
34
|
18
|
26
|
27
|
24
|
27
|
30
|
33
|
24
|
30
|
22
|
23
|
31
|
29
|
28
|
33
|
36
|
|
|
2025/08
|
21
|
23
|
18
|
18
|
20
|
22
|
19
|
24
|
23
|
18
|
28
|
26
|
23
|
20
|
28
|
22
|
16
|
22
|
31
|
26
|
22
|
18
|
25
|
18
|
15
|
21
|
26
|
21
|
23
|
27
|
27
|
|
2025/07
|
16
|
17
|
17
|
19
|
23
|
16
|
23
|
31
|
35
|
35
|
34
|
35
|
27
|
24
|
21
|
12
|
16
|
16
|
18
|
18
|
17
|
22
|
15
|
15
|
21
|
32
|
16
|
22
|
19
|
12
|
17
|
|
2025/06
|
29
|
44
|
16
|
28
|
26
|
31
|
30
|
26
|
39
|
22
|
16
|
22
|
34
|
34
|
36
|
22
|
37
|
27
|
40
|
39
|
15
|
22
|
30
|
40
|
41
|
41
|
51
|
27
|
35
|
32
|
|
|
2025/05
|
31
|
21
|
25
|
21
|
36
|
27
|
39
|
45
|
62
|
36
|
54
|
57
|
49
|
48
|
40
|
33
|
23
|
31
|
23
|
28
|
47
|
40
|
30
|
36
|
35
|
38
|
44
|
34
|
44
|
40
|
52
|
|
2025/04
|
63
|
59
|
61
|
50
|
36
|
61
|
45
|
70
|
68
|
96
|
79
|
40
|
15
|
24
|
33
|
35
|
54
|
49
|
33
|
64
|
138
|
27
|
30
|
74
|
31
|
54
|
53
|
55
|
60
|
58
|
|
|
2025/03
|
54
|
32
|
57
|
34
|
51
|
73
|
57
|
69
|
95
|
77
|
64
|
102
|
58
|
44
|
43
|
59
|
90
|
79
|
70
|
82
|
66
|
80
|
56
|
99
|
96
|
65
|
43
|
30
|
37
|
43
|
70
|
|
2025/02
|
111
|
145
|
74
|
46
|
59
|
66
|
45
|
31
|
41
|
69
|
67
|
62
|
64
|
54
|
67
|
42
|
32
|
35
|
42
|
43
|
43
|
46
|
46
|
32
|
80
|
66
|
75
|
107
|
|||
|
2025/01
|
35
|
31
|
34
|
62
|
94
|
98
|
70
|
73
|
64
|
64
|
107
|
118
|
66
|
62
|
39
|
50
|
40
|
52
|
77
|
167
|
108
|
129
|
99
|
128
|
169
|
90
|
45
|
71
|
76
|
39
|
69
|
|
2024/12
|
47
|
22
|
21
|
28
|
28
|
48
|
41
|
44
|
55
|
51
|
47
|
49
|
99
|
40
|
26
|
37
|
50
|
50
|
54
|
85
|
92
|
40
|
53
|
32
|
51
|
36
|
33
|
33
|
47
|
54
|
43
|
|
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