Air Quality
Excellent
No health implications.
3
PM2.5
22
PM10
57
O3
0.4
CO
2
SO2
14
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
20 May
44
Excellent
Thu
21 May
47
Excellent
Fri
22 May
39
Excellent
Sat
23 May
40
Excellent
Sun
24 May
37
Excellent
Mon
25 May
35
Excellent
Tue
26 May
19
Excellent
Real-time AQI (Monitoring Station in Xisha)
永兴岛子站
144
PM2.5
8
PM10
43
O3
0.3
CO
1
SO2
12
NO2
Air quality in the last 12 months (Xisha)
|
2026/04
|
38
|
32
|
32
|
36
|
38
|
34
|
36
|
41
|
30
|
23
|
24
|
26
|
22
|
21
|
17
|
19
|
23
|
29
|
29
|
25
|
28
|
34
|
37
|
23
|
27
|
31
|
23
|
25
|
33
|
31
|
|
|
2026/03
|
21
|
22
|
27
|
25
|
35
|
38
|
43
|
41
|
39
|
41
|
36
|
38
|
64
|
58
|
59
|
46
|
34
|
28
|
22
|
25
|
25
|
25
|
26
|
23
|
23
|
22
|
39
|
30
|
28
|
22
|
32
|
|
2026/02
|
23
|
29
|
35
|
35
|
23
|
20
|
29
|
39
|
52
|
38
|
35
|
39
|
37
|
33
|
31
|
35
|
47
|
43
|
44
|
46
|
39
|
31
|
38
|
49
|
37
|
47
|
42
|
29
|
|||
|
2026/01
|
31
|
42
|
36
|
36
|
47
|
49
|
47
|
43
|
43
|
47
|
48
|
49
|
49
|
39
|
31
|
25
|
26
|
33
|
35
|
42
|
58
|
55
|
45
|
51
|
26
|
22
|
39
|
41
|
34
|
38
|
27
|
|
2025/12
|
24
|
24
|
25
|
39
|
38
|
39
|
38
|
50
|
44
|
31
|
37
|
37
|
46
|
28
|
36
|
37
|
50
|
45
|
33
|
28
|
33
|
36
|
27
|
30
|
26
|
25
|
36
|
38
|
35
|
35
|
38
|
|
2025/11
|
34
|
38
|
34
|
28
|
26
|
21
|
25
|
23
|
35
|
32
|
34
|
28
|
30
|
33
|
35
|
36
|
37
|
47
|
28
|
41
|
43
|
44
|
47
|
44
|
46
|
54
|
47
|
57
|
55
|
36
|
|
|
2025/10
|
16
|
13
|
14
|
22
|
26
|
19
|
23
|
19
|
23
|
21
|
23
|
15
|
13
|
19
|
19
|
23
|
31
|
33
|
38
|
33
|
20
|
18
|
20
|
27
|
32
|
38
|
31
|
25
|
22
|
26
|
35
|
|
2025/09
|
15
|
23
|
27
|
17
|
21
|
26
|
31
|
27
|
24
|
19
|
12
|
13
|
20
|
11
|
21
|
22
|
20
|
26
|
33
|
27
|
23
|
28
|
32
|
20
|
28
|
17
|
20
|
26
|
32
|
20
|
|
|
2025/08
|
34
|
36
|
41
|
27
|
28
|
43
|
38
|
27
|
19
|
14
|
18
|
22
|
20
|
21
|
13
|
11
|
14
|
10
|
14
|
22
|
21
|
13
|
26
|
26
|
26
|
17
|
16
|
17
|
15
|
31
|
21
|
|
2025/07
|
16
|
16
|
12
|
16
|
19
|
18
|
25
|
29
|
21
|
21
|
24
|
26
|
29
|
26
|
29
|
21
|
18
|
19
|
23
|
22
|
24
|
23
|
21
|
19
|
21
|
27
|
17
|
16
|
21
|
24
|
28
|
|
2025/06
|
25
|
22
|
26
|
17
|
16
|
13
|
16
|
18
|
18
|
24
|
17
|
17
|
30
|
24
|
24
|
23
|
19
|
15
|
17
|
15
|
13
|
12
|
10
|
16
|
9
|
11
|
11
|
14
|
18
|
17
|
|
|
2025/05
|
25
|
25
|
25
|
28
|
20
|
15
|
33
|
28
|
49
|
25
|
20
|
26
|
23
|
16
|
13
|
16
|
14
|
15
|
13
|
14
|
15
|
17
|
15
|
12
|
24
|
24
|
12
|
14
|
13
|
17
|
22
|
|
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