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
12 Jan
Tue
13 Jan
Wed
14 Jan
Thu
15 Jan
Fri
16 Jan
Sat
17 Jan
Sun
18 Jan
Haikou Air quality rank
Real-time AQI (Monitoring Station in Haikou)
海南大学
4520
PM2.5
45
PM10
110
O3
0.3
CO
6
SO2
12
NO2
秀英海南医院
3925
PM2.5
39
PM10
14
O3
0.7
CO
8
SO2
71
NO2
海南师范大学
3921
PM2.5
39
PM10
91
O3
0.5
CO
6
SO2
23
NO2
Air quality in the last 12 months (Haikou)
|
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
|
|
2025/04
|
23
|
36
|
31
|
34
|
40
|
31
|
43
|
37
|
37
|
36
|
28
|
34
|
150
|
167
|
148
|
120
|
80
|
52
|
38
|
27
|
29
|
29
|
31
|
30
|
29
|
25
|
17
|
29
|
37
|
34
|
|
|
2025/03
|
28
|
25
|
29
|
25
|
22
|
14
|
22
|
25
|
37
|
50
|
43
|
30
|
25
|
21
|
24
|
20
|
37
|
42
|
52
|
51
|
47
|
46
|
38
|
41
|
42
|
36
|
35
|
29
|
21
|
11
|
18
|
|
2025/02
|
32
|
18
|
33
|
23
|
28
|
38
|
42
|
34
|
54
|
43
|
36
|
27
|
34
|
25
|
20
|
21
|
33
|
50
|
44
|
37
|
37
|
27
|
33
|
28
|
32
|
45
|
39
|
28
|
|||
|
2025/01
|
65
|
51
|
64
|
53
|
61
|
76
|
48
|
54
|
67
|
61
|
44
|
41
|
44
|
45
|
43
|
57
|
59
|
50
|
51
|
63
|
43
|
56
|
50
|
40
|
32
|
32
|
34
|
34
|
50
|
49
|
49
|
|
2024/12
|
40
|
34
|
34
|
32
|
38
|
42
|
55
|
38
|
39
|
32
|
36
|
46
|
42
|
41
|
56
|
42
|
42
|
46
|
48
|
51
|
48
|
46
|
54
|
57
|
51
|
49
|
66
|
68
|
59
|
48
|
58
|
|
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