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City of Westminster, GB Historical Air Quality Data

Explore historical AQI data and pollutant changes over time.
Nov 14, 2026 22:53
SUNMONTUEWEDTHUFRISAT
27
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 8 µg/m3
SO₂ 3 µg/m3
NO₂ 6 µg/m3
O₃ 73 µg/m3
CO 135 µg/m3
AQI Hourly Forecast Graph
14
Min at 00:00 on Sep 27
44
Max at 13:00 on Sep 27, 2026
✕
28
15
Good
PM2.5: 3
AQI
15
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 3 µg/m3
PM₁₀ 5 µg/m3
SO₂ 3 µg/m3
NO₂ 7 µg/m3
O₃ 72 µg/m3
CO 133 µg/m3
AQI Hourly Forecast Graph
9
Min at 21:00 on Sep 28
19
Max at 14:00 on Sep 28, 2026
✕
29
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 8 µg/m3
SO₂ 3 µg/m3
NO₂ 8 µg/m3
O₃ 59 µg/m3
CO 143 µg/m3
AQI Hourly Forecast Graph
8
Min at 00:00 on Sep 29
47
Max at 14:00 on Sep 29, 2026
✕
30
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 4 µg/m3
SO₂ 2 µg/m3
NO₂ 4 µg/m3
O₃ 79 µg/m3
CO 123 µg/m3
AQI Hourly Forecast Graph
6
Min at 02:00 on Sep 30
17
Max at 13:00 on Sep 30, 2026
✕
01
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 2 µg/m3
SO₂ 1 µg/m3
NO₂ 2 µg/m3
O₃ 78 µg/m3
CO 156 µg/m3
AQI Hourly Forecast Graph
3
Min at 07:00 on Oct 1
6
Max at 01:00 on Oct 1, 2026
✕
02
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 3 µg/m3
SO₂ 2 µg/m3
NO₂ 3 µg/m3
O₃ 80 µg/m3
CO 170 µg/m3
AQI Hourly Forecast Graph
4
Min at 03:00 on Oct 2
12
Max at 00:00 on Oct 2, 2026
✕
03
20
Good
PM2.5: 4
AQI
20
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 4 µg/m3
PM₁₀ 7 µg/m3
SO₂ 7 µg/m3
NO₂ 11 µg/m3
O₃ 75 µg/m3
CO 162 µg/m3
AQI Hourly Forecast Graph
13
Min at 01:00 on Oct 3
29
Max at 18:00 on Oct 3, 2026
✕
04
50
Good
PM2.5: 10
AQI
50
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 10 µg/m3
PM₁₀ 13 µg/m3
SO₂ 10 µg/m3
NO₂ 19 µg/m3
O₃ 61 µg/m3
CO 155 µg/m3
AQI Hourly Forecast Graph
20
Min at 01:00 on Oct 4
67
Max at 17:00 on Oct 4, 2026
✕
05
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 8 µg/m3
SO₂ 8 µg/m3
NO₂ 15 µg/m3
O₃ 64 µg/m3
CO 145 µg/m3
AQI Hourly Forecast Graph
20
Min at 20:00 on Oct 5
43
Max at 05:00 on Oct 5, 2026
✕
06
45
Good
PM2.5: 9
AQI
45
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 9 µg/m3
PM₁₀ 11 µg/m3
SO₂ 6 µg/m3
NO₂ 11 µg/m3
O₃ 69 µg/m3
CO 141 µg/m3
AQI Hourly Forecast Graph
24
Min at 01:00 on Oct 6
67
Max at 00:00 on Oct 6, 2026
✕
07
54
Moderate
PM2.5: 11
AQI
54
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 11 µg/m3
PM₁₀ 13 µg/m3
SO₂ 3 µg/m3
NO₂ 13 µg/m3
O₃ 53 µg/m3
CO 165 µg/m3
AQI Hourly Forecast Graph
3
Min at 00:00 on Oct 7
98
Max at 07:00 on Oct 7, 2026
✕
08
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 1 µg/m3
SO₂ 1 µg/m3
NO₂ 3 µg/m3
O₃ 78 µg/m3
CO 139 µg/m3
AQI Hourly Forecast Graph
3
Min at 01:00 on Oct 8
3
Max at 01:00 on Oct 8, 2026
✕
09
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 5 µg/m3
SO₂ 1 µg/m3
NO₂ 3 µg/m3
O₃ 82 µg/m3
CO 123 µg/m3
AQI Hourly Forecast Graph
3
Min at 01:00 on Oct 9
16
Max at 16:00 on Oct 9, 2026
✕
10
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 3 µg/m3
SO₂ 1 µg/m3
NO₂ 2 µg/m3
O₃ 77 µg/m3
CO 135 µg/m3
AQI Hourly Forecast Graph
4
Min at 20:00 on Oct 10
6
Max at 01:00 on Oct 10, 2026
✕
11
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 2 µg/m3
SO₂ 1 µg/m3
NO₂ 3 µg/m3
O₃ 72 µg/m3
CO 134 µg/m3
AQI Hourly Forecast Graph
3
Min at 01:00 on Oct 11
11
Max at 00:00 on Oct 11, 2026
✕
12
15
Good
PM2.5: 3
AQI
15
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 3 µg/m3
PM₁₀ 5 µg/m3
SO₂ 2 µg/m3
NO₂ 6 µg/m3
O₃ 56 µg/m3
CO 131 µg/m3
AQI Hourly Forecast Graph
9
Min at 08:00 on Oct 12
28
Max at 00:00 on Oct 12, 2026
✕
13
20
Good
PM2.5: 4
AQI
20
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 4 µg/m3
PM₁₀ 8 µg/m3
SO₂ 2 µg/m3
NO₂ 5 µg/m3
O₃ 70 µg/m3
CO 115 µg/m3
AQI Hourly Forecast Graph
8
Min at 22:00 on Oct 13
33
Max at 02:00 on Oct 13, 2026
✕
14
15
Good
PM2.5: 3
AQI
15
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 3 µg/m3
PM₁₀ 9 µg/m3
SO₂ 3 µg/m3
NO₂ 5 µg/m3
O₃ 79 µg/m3
CO 132 µg/m3
AQI Hourly Forecast Graph
7
Min at 02:00 on Oct 14
22
Max at 00:00 on Oct 14, 2026
✕
15
25
Good
PM2.5: 5
AQI
25
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 5 µg/m3
PM₁₀ 9 µg/m3
SO₂ 3 µg/m3
NO₂ 8 µg/m3
O₃ 56 µg/m3
CO 120 µg/m3
AQI Hourly Forecast Graph
24
Min at 01:00 on Oct 15
27
Max at 03:00 on Oct 15, 2026
✕
16
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 4 µg/m3
SO₂ 2 µg/m3
NO₂ 6 µg/m3
O₃ 74 µg/m3
CO 126 µg/m3
AQI Hourly Forecast Graph
3
Min at 19:00 on Oct 16
24
Max at 01:00 on Oct 16, 2026
✕
17
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 3 µg/m3
SO₂ 2 µg/m3
NO₂ 5 µg/m3
O₃ 77 µg/m3
CO 139 µg/m3
AQI Hourly Forecast Graph
3
Min at 01:00 on Oct 17
12
Max at 08:00 on Oct 17, 2026
✕
18
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 3 µg/m3
SO₂ 1 µg/m3
NO₂ 3 µg/m3
O₃ 81 µg/m3
CO 136 µg/m3
AQI Hourly Forecast Graph
3
Min at 13:00 on Oct 18
8
Max at 02:00 on Oct 18, 2026
✕
19
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 3 µg/m3
SO₂ 2 µg/m3
NO₂ 4 µg/m3
O₃ 71 µg/m3
CO 149 µg/m3
AQI Hourly Forecast Graph
3
Min at 01:00 on Oct 19
18
Max at 11:00 on Oct 19, 2026
✕
20
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 7 µg/m3
SO₂ 2 µg/m3
NO₂ 9 µg/m3
O₃ 48 µg/m3
CO 179 µg/m3
AQI Hourly Forecast Graph
10
Min at 20:00 on Oct 20
55
Max at 08:00 on Oct 20, 2026
✕
21
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 2 µg/m3
SO₂ 1 µg/m3
NO₂ 2 µg/m3
O₃ 87 µg/m3
CO 129 µg/m3
AQI Hourly Forecast Graph
3
Min at 11:00 on Oct 21
9
Max at 01:00 on Oct 21, 2026
✕
22
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 2 µg/m3
SO₂ 1 µg/m3
NO₂ 2 µg/m3
O₃ 89 µg/m3
CO 125 µg/m3
AQI Hourly Forecast Graph
3
Min at 01:00 on Oct 22
5
Max at 05:00 on Oct 22, 2026
✕
23
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 4 µg/m3
SO₂ 1 µg/m3
NO₂ 2 µg/m3
O₃ 88 µg/m3
CO 127 µg/m3
AQI Hourly Forecast Graph
3
Min at 18:00 on Oct 23
11
Max at 09:00 on Oct 23, 2026
✕
24
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 2 µg/m3
SO₂ 1 µg/m3
NO₂ 2 µg/m3
O₃ 89 µg/m3
CO 122 µg/m3
AQI Hourly Forecast Graph
3
Min at 01:00 on Oct 24
19
Max at 23:00 on Oct 24, 2026
✕
25
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 6 µg/m3
SO₂ 1 µg/m3
NO₂ 1 µg/m3
O₃ 85 µg/m3
CO 125 µg/m3
AQI Hourly Forecast Graph
5
Min at 10:00 on Oct 25
18
Max at 04:00 on Oct 25, 2026
✕
26
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 7 µg/m3
SO₂ 1 µg/m3
NO₂ 3 µg/m3
O₃ 75 µg/m3
CO 116 µg/m3
AQI Hourly Forecast Graph
10
Min at 01:00 on Oct 26
16
Max at 16:00 on Oct 26, 2026
✕
27
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 4 µg/m3
SO₂ 1 µg/m3
NO₂ 2 µg/m3
O₃ 81 µg/m3
CO 117 µg/m3
AQI Hourly Forecast Graph
4
Min at 19:00 on Oct 27
11
Max at 08:00 on Oct 27, 2026
✕
28
10
Good
PM2.5: 2
AQI
10
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 2 µg/m3
PM₁₀ 7 µg/m3
SO₂ 2 µg/m3
NO₂ 3 µg/m3
O₃ 91 µg/m3
CO 127 µg/m3
AQI Hourly Forecast Graph
5
Min at 05:00 on Oct 28
10
Max at 15:00 on Oct 28, 2026
✕
29
15
Good
PM2.5: 3
AQI
15
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 3 µg/m3
PM₁₀ 8 µg/m3
SO₂ 3 µg/m3
NO₂ 3 µg/m3
O₃ 88 µg/m3
CO 131 µg/m3
AQI Hourly Forecast Graph
10
Min at 01:00 on Oct 29
19
Max at 13:00 on Oct 29, 2026
✕
30
50
Good
PM2.5: 10
AQI
50
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 10 µg/m3
PM₁₀ 15 µg/m3
SO₂ 3 µg/m3
NO₂ 7 µg/m3
O₃ 66 µg/m3
CO 167 µg/m3
AQI Hourly Forecast Graph
16
Min at 01:00 on Oct 30
90
Max at 00:00 on Oct 30, 2026
✕
31
67
Moderate
PM2.5: 15
AQI
67
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 15 µg/m3
PM₁₀ 19 µg/m3
SO₂ 3 µg/m3
NO₂ 10 µg/m3
O₃ 53 µg/m3
CO 189 µg/m3
AQI Hourly Forecast Graph
52
Min at 19:00 on Oct 31
93
Max at 01:00 on Oct 31, 2026
✕
Historical AQI from OpenWeather
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