Air Quality
Excellent
No health implications.
20
PM2.5
34
PM10
59
O3
0.5
CO
12
SO2
21
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
31 Jul
98
Good
Fri
1 Aug
96
Good
Sat
2 Aug
91
Good
Sun
3 Aug
102
Light
Mon
4 Aug
101
Light
Tue
5 Aug
20
Excellent
Wed
6 Aug
22
Excellent
Bishan Air quality rank
Air quality in the last 12 months (Bishan)
|
2025/06
|
30
|
27
|
41
|
48
|
56
|
57
|
42
|
25
|
20
|
34
|
37
|
38
|
35
|
39
|
34
|
38
|
29
|
25
|
17
|
26
|
26
|
20
|
20
|
21
|
16
|
27
|
26
|
25
|
24
|
20
|
|
|
2025/05
|
49
|
60
|
86
|
68
|
48
|
76
|
56
|
39
|
61
|
61
|
54
|
54
|
61
|
73
|
86
|
78
|
66
|
78
|
66
|
64
|
60
|
42
|
58
|
65
|
47
|
46
|
30
|
27
|
31
|
31
|
27
|
|
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
|
|
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