Air Quality
Excellent
No health implications.
PM2.5
PM10
O3
CO
SO2
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
21 May
Fri
22 May
Sat
23 May
Sun
24 May
Mon
25 May
Tue
26 May
Wed
27 May
Real-time AQI (Monitoring Station in Haikou)
海南大学
2212
PM2.5
22
PM10
40
O3
0.3
CO
4
SO2
4
NO2
秀英海南医院
2110
PM2.5
21
PM10
25
O3
0.3
CO
5
SO2
16
NO2
海南师范大学
2513
PM2.5
25
PM10
32
O3
0.4
CO
3
SO2
5
NO2
Air quality in the last 12 months (Haikou)
|
2026/04
|
42
|
37
|
37
|
32
|
49
|
48
|
49
|
46
|
33
|
33
|
45
|
44
|
38
|
36
|
25
|
22
|
24
|
25
|
31
|
31
|
27
|
31
|
51
|
25
|
30
|
33
|
22
|
27
|
30
|
26
|
|
|
2026/03
|
17
|
22
|
23
|
14
|
25
|
31
|
33
|
43
|
34
|
25
|
39
|
39
|
43
|
45
|
41
|
37
|
33
|
28
|
25
|
22
|
23
|
30
|
31
|
26
|
26
|
25
|
27
|
31
|
29
|
27
|
33
|
|
2026/02
|
29
|
31
|
30
|
39
|
32
|
20
|
22
|
37
|
38
|
38
|
33
|
27
|
38
|
31
|
26
|
27
|
33
|
42
|
35
|
34
|
32
|
27
|
28
|
30
|
43
|
31
|
36
|
15
|
|||
|
2026/01
|
35
|
43
|
34
|
39
|
43
|
50
|
41
|
37
|
43
|
41
|
41
|
47
|
54
|
53
|
41
|
37
|
39
|
43
|
36
|
40
|
51
|
45
|
42
|
46
|
25
|
29
|
33
|
51
|
33
|
30
|
25
|
|
2025/12
|
51
|
32
|
37
|
59
|
48
|
57
|
45
|
62
|
50
|
49
|
58
|
42
|
41
|
28
|
52
|
43
|
56
|
46
|
45
|
38
|
41
|
42
|
41
|
35
|
31
|
31
|
38
|
39
|
45
|
44
|
52
|
|
2025/11
|
39
|
44
|
46
|
22
|
21
|
29
|
17
|
18
|
34
|
36
|
34
|
27
|
49
|
33
|
40
|
44
|
39
|
49
|
27
|
32
|
37
|
40
|
51
|
53
|
46
|
52
|
50
|
54
|
59
|
44
|
|
|
2025/10
|
16
|
14
|
15
|
16
|
22
|
18
|
20
|
16
|
21
|
27
|
24
|
15
|
12
|
12
|
18
|
23
|
24
|
30
|
33
|
28
|
23
|
21
|
22
|
32
|
39
|
40
|
36
|
40
|
42
|
28
|
46
|
|
2025/09
|
13
|
15
|
12
|
14
|
14
|
14
|
20
|
17
|
18
|
17
|
18
|
13
|
13
|
16
|
20
|
14
|
15
|
17
|
21
|
22
|
22
|
11
|
24
|
23
|
18
|
19
|
27
|
18
|
23
|
20
|
|
|
2025/08
|
26
|
29
|
34
|
33
|
27
|
33
|
30
|
23
|
27
|
21
|
20
|
22
|
23
|
19
|
17
|
16
|
19
|
9
|
17
|
21
|
21
|
16
|
20
|
20
|
19
|
17
|
15
|
16
|
18
|
16
|
13
|
|
2025/07
|
16
|
13
|
12
|
13
|
18
|
18
|
19
|
24
|
26
|
25
|
20
|
21
|
25
|
27
|
32
|
27
|
22
|
27
|
19
|
12
|
10
|
18
|
23
|
16
|
18
|
18
|
22
|
17
|
20
|
20
|
20
|
|
2025/06
|
22
|
22
|
29
|
24
|
11
|
16
|
20
|
23
|
21
|
23
|
20
|
17
|
14
|
15
|
20
|
19
|
24
|
19
|
17
|
18
|
17
|
15
|
15
|
15
|
13
|
11
|
12
|
17
|
16
|
17
|
|
|
2025/05
|
26
|
22
|
28
|
26
|
22
|
25
|
22
|
16
|
25
|
20
|
27
|
36
|
29
|
18
|
12
|
16
|
16
|
19
|
19
|
20
|
20
|
17
|
17
|
15
|
33
|
41
|
33
|
23
|
16
|
13
|
14
|
|
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
*: primary pollution