Air Quality
Good
Some pollutants may slightly affect very few hypersensitive individuals.
25
PM2.5
57
*
PM10
80
O3
0.4
CO
9
SO2
13
NO2
Some pollutants may slightly affect very few hypersensitive individuals.
Advise
Only very few hypersensitive people should reduce outdoor activities.
Air Quality
Today
25 May
89
Good
Mon
26 May
97
Good
Tue
27 May
53
Good
Wed
28 May
75
Good
Thu
29 May
84
Good
Fri
30 May
76
Good
Sat
31 May
31
Excellent
Air quality in the last 12 months (Bishan)
|
2025/04
|
37
|
48
|
55
|
57
|
76
|
79
|
67
|
64
|
75
|
71
|
54
|
266
|
250
|
151
|
109
|
78
|
77
|
65
|
49
|
37
|
46
|
45
|
48
|
41
|
50
|
53
|
43
|
43
|
48
|
38
|
|
|
2025/03
|
102
|
98
|
36
|
30
|
25
|
24
|
39
|
54
|
69
|
60
|
56
|
84
|
86
|
64
|
42
|
37
|
29
|
30
|
42
|
52
|
66
|
79
|
64
|
59
|
60
|
60
|
98
|
80
|
23
|
31
|
35
|
|
2025/02
|
100
|
66
|
38
|
34
|
63
|
37
|
34
|
39
|
54
|
61
|
80
|
80
|
36
|
43
|
45
|
50
|
56
|
45
|
50
|
46
|
45
|
40
|
39
|
44
|
72
|
70
|
69
|
73
|
|||
|
2025/01
|
140
|
187
|
188
|
172
|
131
|
121
|
89
|
46
|
51
|
47
|
51
|
63
|
95
|
111
|
106
|
97
|
109
|
134
|
115
|
123
|
148
|
200
|
239
|
108
|
40
|
42
|
53
|
75
|
172
|
192
|
118
|
|
2024/12
|
80
|
102
|
90
|
89
|
46
|
45
|
42
|
40
|
44
|
64
|
72
|
54
|
58
|
52
|
62
|
79
|
111
|
132
|
105
|
90
|
131
|
88
|
70
|
103
|
125
|
124
|
127
|
125
|
130
|
114
|
107
|
|
2024/11
|
51
|
56
|
72
|
88
|
42
|
47
|
77
|
74
|
42
|
46
|
60
|
65
|
52
|
51
|
53
|
34
|
24
|
24
|
22
|
30
|
43
|
50
|
44
|
31
|
27
|
41
|
46
|
44
|
60
|
72
|
|
|
2024/10
|
19
|
24
|
29
|
41
|
49
|
47
|
48
|
49
|
67
|
96
|
75
|
44
|
56
|
59
|
54
|
60
|
30
|
38
|
47
|
22
|
28
|
32
|
42
|
56
|
83
|
99
|
40
|
57
|
70
|
117
|
116
|
|
2024/09
|
42
|
41
|
27
|
30
|
38
|
39
|
45
|
32
|
28
|
33
|
41
|
37
|
35
|
54
|
32
|
32
|
36
|
37
|
34
|
46
|
34
|
44
|
38
|
53
|
70
|
106
|
49
|
44
|
38
|
17
|
|
|
2024/08
|
30
|
23
|
23
|
25
|
35
|
34
|
27
|
25
|
33
|
42
|
49
|
65
|
60
|
47
|
45
|
41
|
41
|
57
|
42
|
45
|
41
|
36
|
30
|
27
|
23
|
27
|
40
|
35
|
35
|
31
|
32
|
|
2024/07
|
34
|
34
|
38
|
33
|
23
|
37
|
27
|
42
|
37
|
26
|
22
|
29
|
34
|
26
|
28
|
28
|
27
|
37
|
29
|
29
|
26
|
31
|
30
|
23
|
52
|
50
|
38
|
35
|
35
|
34
|
33
|
|
2024/06
|
58
|
30
|
33
|
27
|
35
|
29
|
29
|
34
|
37
|
33
|
40
|
45
|
48
|
54
|
49
|
44
|
37
|
31
|
26
|
31
|
25
|
34
|
41
|
40
|
42
|
35
|
17
|
17
|
28
|
41
|
|
|
2024/05
|
34
|
32
|
27
|
36
|
38
|
43
|
65
|
58
|
56
|
51
|
54
|
53
|
50
|
53
|
37
|
48
|
49
|
48
|
43
|
27
|
23
|
31
|
38
|
45
|
43
|
27
|
39
|
39
|
27
|
35
|
51
|
|
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