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Z AQI Data

Today’s Air Quality Index (AQI)
City of Westminster, GB
11:28 AM, Mar 30, 2026
Last updated on: 11:28 AM
19
Good Air is clean and safe. No health risks expected. Everyone can enjoy outdoor activities without concern.
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
0
50
100
150
200
250
300+
Primary Pollutant: PM2.5 (Particulate matter less than 3.86 microns)
Pollutant Details
Good Particulate Matter (PM₂.₅) 3.86 µg/m³
City of Westminster Particulate Matter (PM₂.₅) Level United Kingdom
Particulate Matter (PM₂.₅)
3.86 µg/m³ Good
Last updated on: Mar 30, 2026 11:28 AM
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
0
10
25
50
75
100+

The current Particulate Matter (PM₂.₅) level at City of Westminster is 3.86 µg/m³ , which is excellent. The air is clean and safe for everyone.

3.9x Below
The current Particulate Matter (PM₂.₅) level in City of Westminster is 3.9x Below the recommended WHO guideline of 15 µg/m³.
Pollutant Sources:
  • Vehicle exhaust (especially diesel)
  • Industrial emissions
  • Residential wood burning
  • Wildfires
  • Construction and demolition dust
  • Coal and biomass burning
  • Secondary formation from gases like SO₂, NOx
✕
Good Particulate Matter (PM₁₀) 10.73 µg/m³
City of Westminster Particulate Matter (PM₁₀) Level United Kingdom
Particulate Matter (PM₁₀)
10.73 µg/m³ Good
Last updated on: Mar 30, 2026 11:28 AM
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
0
20
50
100
200
250+

The current Particulate Matter (PM₁₀) level at City of Westminster is 10.73 µg/m³ , which is excellent. The air is clean and safe for everyone.

4.2x Below
The current Particulate Matter (PM₁₀) level in City of Westminster is 4.2x Below the recommended WHO guideline of 45 µg/m³.
Pollutant Sources:
  • Road dust and soil dust
  • Construction sites
  • Mining and agriculture
  • Industrial grinding/crushing
  • Pollen, mold spores
  • Sea spray in coastal areas
✕
Good Sulphur Dioxide (SO₂) 2.79 µg/m³
City of Westminster Sulphur Dioxide (SO₂) Level United Kingdom
Sulphur Dioxide (SO₂)
2.79 µg/m³ Good
Last updated on: Mar 30, 2026 11:28 AM
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
0
20
80
250
350
400+

The current Sulphur Dioxide (SO₂) level at City of Westminster is 2.79 µg/m³ , which is excellent. The air is clean and safe for everyone.

14.3x Below
The current Sulphur Dioxide (SO₂) level in City of Westminster is 14.3x Below the recommended WHO guideline of 40 µg/m³.
Pollutant Sources:
  • Coal-fired power plants
  • Industrial boilers
  • Oil refineries
  • Ships using high-sulfur fuel
  • Metal smelting
✕
Good Nitrogen Dioxide (NO₂) 4.98 µg/m³
City of Westminster Nitrogen Dioxide (NO₂) Level United Kingdom
Nitrogen Dioxide (NO₂)
4.98 µg/m³ Good
Last updated on: Mar 30, 2026 11:28 AM
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
0
40
70
150
200
250+

The current Nitrogen Dioxide (NO₂) level at City of Westminster is 4.98 µg/m³ , which is excellent. The air is clean and safe for everyone.

5x Below
The current Nitrogen Dioxide (NO₂) level in City of Westminster is 5x Below the recommended WHO guideline of 25 µg/m³.
Pollutant Sources:
  • Vehicle engines (especially diesel)
  • Heating systems
  • Power plants (burning fossil fuels)
  • Gas stoves (indoor NO₂)
  • Industrial combustion processes
✕
Moderate Ozone (O₃) 95.8 µg/m³
City of Westminster Ozone (O₃) Level United Kingdom
Ozone (O₃)
95.8 µg/m³ Moderate
Last updated on: Mar 30, 2026 11:28 AM
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
0
60
100
140
180
220+

The current Ozone (O₃) level at City of Westminster is 95.8 µg/m³ , which is acceptable. Sensitive individuals should take light caution.

1x Below
The current Ozone (O₃) level in City of Westminster is 1x Below the recommended WHO guideline of 100 µg/m³.
Pollutant Sources:
  • Car and truck exhaust
  • Power plants
  • Industrial solvents and paints (VOCs)
  • Chemical manufacturing
  • Gasoline vapors
  • Lawn equipment
✕
Good Carbon Monoxide (CO) 136.94 µg/m³
City of Westminster Carbon Monoxide (CO) Level United Kingdom
Carbon Monoxide (CO)
136.94 µg/m³ Good
Last updated on: Mar 30, 2026 11:28 AM
Good
Moderate
Poor
Unhealthy
Severe
Hazardous
0
4400
9400
12400
15400
18000+

The current Carbon Monoxide (CO) level at City of Westminster is 136.94 µg/m³ , which is excellent. The air is clean and safe for everyone.

29.2x Below
The current Carbon Monoxide (CO) level in City of Westminster is 29.2x Below the recommended WHO guideline of 4000 µg/m³.
Pollutant Sources:
  • Incomplete combustion in vehicles
  • Wildfires
  • Gas stoves and heaters
  • Cigarette smoke
  • Wood burning stoves
  • Faulty indoor appliances
✕
Air Quality Hourly Forecast
  • Daily
  • Hourly
Good Air is clean and safe. No health risks expected. Everyone can enjoy outdoor activities without concern.
Good Particulate Matter (PM₂.₅) 2.75 µg/m³
Good Particulate Matter (PM₁₀) 9.53 µg/m³
Good Sulphur Dioxide (SO₂) 2.9 µg/m³
Good Nitrogen Dioxide (NO₂) 5.39 µg/m³
Poor Ozone (O₃) 104.34 µg/m³
Good Carbon Monoxide (CO) 135.93 µg/m³
Good Air is clean and safe. No health risks expected. Everyone can enjoy outdoor activities without concern.
Good Particulate Matter (PM₂.₅) 3.09 µg/m³
Good Particulate Matter (PM₁₀) 6.12 µg/m³
Good Sulphur Dioxide (SO₂) 5.75 µg/m³
Good Nitrogen Dioxide (NO₂) 13.1 µg/m³
Moderate Ozone (O₃) 64.56 µg/m³
Good Carbon Monoxide (CO) 133.8 µg/m³
Good Air is clean and safe. No health risks expected. Everyone can enjoy outdoor activities without concern.
Good Particulate Matter (PM₂.₅) 5.89 µg/m³
Good Particulate Matter (PM₁₀) 7.66 µg/m³
Good Sulphur Dioxide (SO₂) 8.48 µg/m³
Good Nitrogen Dioxide (NO₂) 18.35 µg/m³
Good Ozone (O₃) 58.89 µg/m³
Good Carbon Monoxide (CO) 131.09 µg/m³
Good Air is clean and safe. No health risks expected. Everyone can enjoy outdoor activities without concern.
Good Particulate Matter (PM₂.₅) 1.91 µg/m³
Good Particulate Matter (PM₁₀) 3.11 µg/m³
Good Sulphur Dioxide (SO₂) 4.07 µg/m³
Good Nitrogen Dioxide (NO₂) 7.49 µg/m³
Moderate Ozone (O₃) 92.9 µg/m³
Good Carbon Monoxide (CO) 125.38 µg/m³

london, GB Historical Air Quality Data

Explore historical AQI data and pollutant changes over time.
Mar 30, 2026 10:28 AM
SUNMONTUEWEDTHUFRISAT
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 1 µg/m3
SO₂ 2 µg/m3
NO₂ 6 µg/m3
O₃ 69 µg/m3
CO 143 µg/m3
AQI Hourly Forecast Graph
3
Min at 1:00 AM on Feb 1
6
Max at 2:00 PM on Feb 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 7 µg/m3
O₃ 72 µg/m3
CO 156 µg/m3
AQI Hourly Forecast Graph
4
Min at 1:00 AM on Feb 2
22
Max at 9:00 PM on Feb 2, 2026
03
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 7 µg/m3
O₃ 61 µg/m3
CO 179 µg/m3
AQI Hourly Forecast Graph
3
Min at 6:00 PM on Feb 3
28
Max at 11:00 AM on Feb 3, 2026
04
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 6 µg/m3
SO₂ 3 µg/m3
NO₂ 9 µg/m3
O₃ 54 µg/m3
CO 195 µg/m3
AQI Hourly Forecast Graph
0
Min at 4:00 AM on Feb 4
40
Max at 4:00 PM on Feb 4, 2026
05
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 2 µg/m3
NO₂ 5 µg/m3
O₃ 66 µg/m3
CO 158 µg/m3
AQI Hourly Forecast Graph
3
Min at 8:00 AM on Feb 5
28
Max at 1:00 AM on Feb 5, 2026
06
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 2 µg/m3
NO₂ 4 µg/m3
O₃ 75 µg/m3
CO 139 µg/m3
AQI Hourly Forecast Graph
4
Min at 8:00 AM on Feb 6
6
Max at 2:00 AM on Feb 6, 2026
07
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 2 µg/m3
NO₂ 4 µg/m3
O₃ 86 µg/m3
CO 144 µg/m3
AQI Hourly Forecast Graph
3
Min at 6:00 AM on Feb 7
9
Max at 12:00 AM on Feb 7, 2026
08
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 4 µg/m3
SO₂ 4 µg/m3
NO₂ 10 µg/m3
O₃ 57 µg/m3
CO 170 µg/m3
AQI Hourly Forecast Graph
10
Min at 1:00 AM on Feb 8
26
Max at 10:00 AM on Feb 8, 2026
09
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 4 µg/m3
SO₂ 3 µg/m3
NO₂ 6 µg/m3
O₃ 68 µg/m3
CO 162 µg/m3
AQI Hourly Forecast Graph
6
Min at 11:00 PM on Feb 9
39
Max at 2:00 PM on Feb 9, 2026
10
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 3 µg/m3
NO₂ 9 µg/m3
O₃ 61 µg/m3
CO 131 µg/m3
AQI Hourly Forecast Graph
6
Min at 1:00 AM on Feb 10
12
Max at 8:00 PM on Feb 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 3 µg/m3
SO₂ 2 µg/m3
NO₂ 5 µg/m3
O₃ 78 µg/m3
CO 131 µg/m3
AQI Hourly Forecast Graph
4
Min at 8:00 PM on Feb 11
9
Max at 1:00 AM on Feb 11, 2026
12
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 2 µg/m3
NO₂ 4 µg/m3
O₃ 71 µg/m3
CO 151 µg/m3
AQI Hourly Forecast Graph
3
Min at 7:00 AM on Feb 12
7
Max at 3:00 AM on Feb 12, 2026
13
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 2 µg/m3
NO₂ 6 µg/m3
O₃ 75 µg/m3
CO 156 µg/m3
AQI Hourly Forecast Graph
3
Min at 1:00 AM on Feb 13
6
Max at 4:00 PM on Feb 13, 2026
14
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 2 µg/m3
NO₂ 5 µg/m3
O₃ 84 µg/m3
CO 162 µg/m3
AQI Hourly Forecast Graph
3
Min at 2:00 AM on Feb 14
5
Max at 2:00 PM on Feb 14, 2026
15
0
Good
PM2.5: 0
AQI
0
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 0 µg/m3
PM₁₀ 0 µg/m3
SO₂ 0 µg/m3
NO₂ 0 µg/m3
O₃ 4 µg/m3
CO 6 µg/m3
16
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 82 µg/m3
CO 133 µg/m3
AQI Hourly Forecast Graph
3
Min at 2:00 AM on Feb 16
3
Max at 2:00 AM on Feb 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 2 µg/m3
SO₂ 3 µg/m3
NO₂ 6 µg/m3
O₃ 91 µg/m3
CO 139 µg/m3
AQI Hourly Forecast Graph
3
Min at 1:00 AM on Feb 17
5
Max at 3:00 PM on Feb 17, 2026
18
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 1 µg/m3
NO₂ 6 µg/m3
O₃ 80 µg/m3
CO 173 µg/m3
AQI Hourly Forecast Graph
3
Min at 1:00 AM on Feb 18
17
Max at 4:00 PM on Feb 18, 2026
19
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 5 µg/m3
SO₂ 4 µg/m3
NO₂ 14 µg/m3
O₃ 54 µg/m3
CO 190 µg/m3
AQI Hourly Forecast Graph
4
Min at 1:00 AM on Feb 19
39
Max at 2:00 PM on Feb 19, 2026
20
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 92 µg/m3
CO 142 µg/m3
AQI Hourly Forecast Graph
3
Min at 6:00 AM on Feb 20
19
Max at 1:00 AM on Feb 20, 2026
21
0
Good
PM2.5: 0
AQI
0
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 0 µg/m3
PM₁₀ 0 µg/m3
SO₂ 0 µg/m3
NO₂ 0 µg/m3
O₃ 4 µg/m3
CO 6 µg/m3
23
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 10 µg/m3
SO₂ 3 µg/m3
NO₂ 7 µg/m3
O₃ 79 µg/m3
CO 122 µg/m3
AQI Hourly Forecast Graph
19
Min at 6:00 PM on Feb 23
29
Max at 12:00 AM on Feb 23, 2026
24
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 6 µg/m3
SO₂ 4 µg/m3
NO₂ 11 µg/m3
O₃ 63 µg/m3
CO 134 µg/m3
AQI Hourly Forecast Graph
10
Min at 1:00 PM on Feb 24
29
Max at 1:00 AM on Feb 24, 2026
25
35
Good
PM2.5: 7
AQI
35
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 7 µg/m3
PM₁₀ 9 µg/m3
SO₂ 7 µg/m3
NO₂ 21 µg/m3
O₃ 30 µg/m3
CO 173 µg/m3
AQI Hourly Forecast Graph
15
Min at 4:00 AM on Feb 25
61
Max at 11:00 PM on Feb 25, 2026
26
35
Good
PM2.5: 7
AQI
35
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 7 µg/m3
PM₁₀ 12 µg/m3
SO₂ 4 µg/m3
NO₂ 15 µg/m3
O₃ 59 µg/m3
CO 158 µg/m3
AQI Hourly Forecast Graph
12
Min at 3:00 PM on Feb 26
69
Max at 4:00 AM on Feb 26, 2026
27
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 78 µg/m3
CO 138 µg/m3
AQI Hourly Forecast Graph
7
Min at 12:00 AM on Feb 27
23
Max at 4:00 AM on Feb 27, 2026
28
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 4 µg/m3
O₃ 90 µg/m3
CO 137 µg/m3
AQI Hourly Forecast Graph
4
Min at 12:00 PM on Feb 28
8
Max at 6:00 AM on Feb 28, 2026
01
0
Good
PM2.5: 0
AQI
0
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 0 µg/m3
PM₁₀ 0 µg/m3
SO₂ 0 µg/m3
NO₂ 0 µg/m3
O₃ 4 µg/m3
CO 6 µg/m3
02
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 6 µg/m3
SO₂ 4 µg/m3
NO₂ 10 µg/m3
O₃ 68 µg/m3
CO 138 µg/m3
AQI Hourly Forecast Graph
6
Min at 2:00 AM on Mar 2
37
Max at 12:00 AM on Mar 2, 2026
03
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 18 µg/m3
SO₂ 6 µg/m3
NO₂ 21 µg/m3
O₃ 36 µg/m3
CO 166 µg/m3
AQI Hourly Forecast Graph
38
Min at 1:00 AM on Mar 3
103
Max at 11:00 PM on Mar 3, 2026
04
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 0 µg/m3
NO₂ 1 µg/m3
O₃ 2 µg/m3
CO 7 µg/m3
05
77
Moderate
PM2.5: 18
AQI
77
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 18 µg/m3
PM₁₀ 22 µg/m3
SO₂ 5 µg/m3
NO₂ 15 µg/m3
O₃ 58 µg/m3
CO 202 µg/m3
AQI Hourly Forecast Graph
66
Min at 10:00 PM on Mar 5
94
Max at 2:00 AM on Mar 5, 2026
06
87
Moderate
PM2.5: 21
AQI
87
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 21 µg/m3
PM₁₀ 24 µg/m3
SO₂ 7 µg/m3
NO₂ 38 µg/m3
O₃ 12 µg/m3
CO 201 µg/m3
AQI Hourly Forecast Graph
70
Min at 1:00 AM on Mar 6
105
Max at 12:00 PM on Mar 6, 2026
07
90
Moderate
PM2.5: 22
AQI
90
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 22 µg/m3
PM₁₀ 27 µg/m3
SO₂ 4 µg/m3
NO₂ 14 µg/m3
O₃ 46 µg/m3
CO 210 µg/m3
AQI Hourly Forecast Graph
70
Min at 11:00 PM on Mar 7
115
Max at 7:00 AM on Mar 7, 2026