24 Hour Summary, based on data provided by Environment Agency

Here you can view the detailed data behind the latest measurement summary displayed on UK-AIR, and also a summary of information that has been displayed over the previous 24 hours. The detailed data tabulated below are from monitoring sites within the AURN. Graphs of hourly monitoring data are also available to view as weekly time series. You can also subscribe to this information as an email alert.

  • View the legend
  • Maximum pollutant levels displayed on UK-AIR for the 24 hour period up to 6pm Sat 2nd May 2026

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Central Scotland

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Auchencorth Moss
Timeseries Graph
78 (3 Low)n/mn/m9 (1 Low)15 (1 Low)
*2
02/05/2026
16:00:00
Bush Estate
Timeseries Graph
87 (3 Low)5 (1 Low)n/mn/mn/m 02/05/2026
18:00:00
Dumbarton Roadside
Timeseries Graph
n/m21 (1 Low)n/mn/mn/m 02/05/2026
17:00:00
Edinburgh Nicolson Street
Timeseries Graph
n/m59 (1 Low)n/mn/mn/m 01/05/2026
19:00:00
Edinburgh St Leonards
Timeseries Graph
80 (3 Low)28 (1 Low)2 (1 Low)11 (1 Low)18 (2 Low)
*2
02/05/2026
16:45:00
Glasgow Great Western Road
Timeseries Graph
n/m28 (1 Low)n/mn/mn/m 02/05/2026
02:00:00
Glasgow High Street
Timeseries Graph
n/m31 (1 Low)n/m14 (2 Low)26 (2 Low)
*2
02/05/2026
18:00:00
Glasgow Kerbside
Timeseries Graph
n/m77 (2 Low)n/mn/mn/m 01/05/2026
24:00:
Glasgow Townhead
Timeseries Graph
87 (3 Low)37 (1 Low)n/m12 (2 Low)22 (2 Low)
*2
02/05/2026
14:00:00
Grangemouth
Timeseries Graph
n/m15 (1 Low)3 (1 Low)11 (1 Low)21 (2 Low)
*1
02/05/2026
01:45:00
Grangemouth Moray
Timeseries Graph
n/m10 (1 Low)n/mn/mn/m 02/05/2026
07:00:00
Greenock A8 Roadside
Timeseries Graph
n/m42 (1 Low)n/m12 (2 Low)21 (2 Low)
*2
02/05/2026
18:00:00

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East Midlands

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Chesterfield Loundsley Green
Timeseries Graph
107 (4 Moderate)18 (1 Low)n/m13 (2 Low)24 (2 Low)
*2
02/05/2026
14:00:00
Chesterfield Roadside
Timeseries Graph
n/m26 (1 Low)n/m14 (2 Low)27 (2 Low)
*2
02/05/2026
12:00:00
Derby St Alkmund's Way
Timeseries Graph
n/m37 (1 Low)n/m15 (2 Low)n/m 02/05/2026
17:00:00
Derby Stockbrook Park
Timeseries Graph
102 (4 Moderate)n/mn/m13 (2 Low)26 (2 Low)
*2
02/05/2026
17:00:00
Ladybower
Timeseries Graph
118 (4 Moderate)14 (1 Low)6 (1 Low)19 (2 Low)28 (2 Low)
*2
02/05/2026
16:30:00
Leicester A594 Roadside
Timeseries Graph
n/m54 (1 Low)n/m14 (2 Low)27 (2 Low)
*2
02/05/2026
18:00:00
Leicester University
Timeseries Graph
109 (4 Moderate)29 (1 Low)n/m13 (2 Low)22 (2 Low)
*2
02/05/2026
18:00:00
Lincoln Canwick Road
Timeseries Graph
n/m72 (2 Low)n/mn/mn/m 01/05/2026
20:00:00
Loughborough Thorpe Acre
Timeseries Graph
n/mn/mn/m12 (2 Low)23 (2 Low)
*2
02/05/2026
18:00:00
Mansfield Ladybrook
Timeseries Graph
n/mn/mn/m15 (2 Low)27 (2 Low)
*2
02/05/2026
18:00:00
Northampton Spring Park
Timeseries Graph
110 (4 Moderate)19 (1 Low)n/m16 (2 Low)n/m 02/05/2026
10:00:00
Nottingham Bilborough
Timeseries Graph
n/mn/mn/m14 (2 Low)26 (2 Low)
*2
02/05/2026
18:00:00
Nottingham Kenmore Gardens
Timeseries Graph
104 (4 Moderate)15 (1 Low)2 (1 Low)16 (2 Low)29 (2 Low)
*2
01/05/2026
19:30:00
Nottingham Western Boulevard
Timeseries Graph
n/m35 (1 Low)n/m15 (2 Low)28 (2 Low)
*2
02/05/2026
18:00:00
Tallington
Timeseries Graph
124 (5 Moderate)n/mn/m13 (2 Low)26 (2 Low)
*2
02/05/2026
18:00:00
Toft Newton
Timeseries Graph
128 (5 Moderate)14 (1 Low)n/m12 (2 Low)24 (2 Low)
*2
02/05/2026
18:00:00

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Eastern

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Borehamwood Meadow Park
Timeseries Graph
n/m21 (1 Low)n/m12 (2 Low)21 (2 Low)
*2
02/05/2026
15:00:00
Cambridge King's Hedges
Timeseries Graph
n/mn/mn/m13 (2 Low)23 (2 Low)
*2
02/05/2026
17:00:00
Cambridge Roadside
Timeseries Graph
n/m52 (1 Low)n/mn/mn/m 02/05/2026
18:00:00
Luton A505 Roadside
Timeseries Graph
n/m37 (1 Low)n/m12 (2 Low)n/m 02/05/2026
17:00:00
Norwich Lakenfields
Timeseries Graph
102 (4 Moderate)14 (1 Low)n/m12 (2 Low)20 (2 Low)
*2
02/05/2026
18:00:00
Peterborough Garton End
Timeseries Graph
n/mn/mn/m12 (2 Low)28 (2 Low)
*2
02/05/2026
17:00:00
Sibton
Timeseries Graph
100 (3 Low)n/mn/m13 (2 Low)21 (2 Low)
*2
02/05/2026
18:00:00
Southend Shoeburyness
Timeseries Graph
n/mn/mn/m12 (2 Low)19 (2 Low)
*2
02/05/2026
17:00:00
Southend-on-Sea
Timeseries Graph
100 (3 Low)24 (1 Low)n/m13 (2 Low)21 (2 Low)
*2
02/05/2026
17:00:00
St Osyth
Timeseries Graph
102 (4 Moderate)18 (1 Low)n/m14 (2 Low)26 (2 Low)
*2
02/05/2026
16:00:00
Stanford-le-Hope Roadside
Timeseries Graph
n/m20 (1 Low)n/m15 (2 Low)22 (2 Low)
*1
02/05/2026
18:00:00
Stevenage St Georges Way South
Timeseries Graph
n/mn/mn/m11 (1 Low)n/m 02/05/2026
15:00:00
Thurrock
Timeseries Graph
n/an/a2 (1 Low)12 (2 Low)22 (2 Low)
*2
02/05/2026
16:45:00
Weybourne
Timeseries Graph
112 (4 Moderate)n/mn/m14 (2 Low)22 (2 Low)
*2
02/05/2026
18:00:00
Wicken Fen
Timeseries Graph
105 (4 Moderate)10 (1 Low)2 (1 Low)11 (1 Low)22 (2 Low)
*2
01/05/2026
18:15:00

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Greater London

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Camden Kerbside
Timeseries Graph
n/m25 (1 Low)n/m14 (2 Low)32 (2 Low)
*1
02/05/2026
16:00:00
Ealing Horn Lane
Timeseries Graph
n/mn/mn/mn/m43 (3 Low)
*1
02/05/2026
11:00:00
Haringey Roadside
Timeseries Graph
n/m31 (1 Low)n/mn/mn/m 01/05/2026
20:00:00
London A406 N Circular
Timeseries Graph
n/mn/mn/m13 (2 Low)n/m 02/05/2026
18:00:00
London Bexley
Timeseries Graph
n/m18 (1 Low)n/m10 (1 Low)20 (2 Low)
*2
02/05/2026
18:00:00
London Bloomsbury
Timeseries Graph
99 (3 Low)15 (1 Low)2 (1 Low)12 (2 Low)23 (2 Low)
*2
02/05/2026
17:30:00
London Farringdon Street
Timeseries Graph
n/m27 (1 Low)n/m14 (2 Low)n/m 02/05/2026
14:00:00
London Haringey Priory Park South
Timeseries Graph
109 (4 Moderate)21 (1 Low)n/m11 (1 Low)22 (2 Low)
*2
02/05/2026
15:00:00
London Harlington
Timeseries Graph
103 (4 Moderate)42 (1 Low)n/m11 (1 Low)19 (2 Low)
*2
02/05/2026
15:00:00
London Hillingdon
Timeseries Graph
89 (3 Low)45 (1 Low)n/m14 (2 Low)27 (2 Low)
*2
02/05/2026
14:00:00
London Honor Oak Park
Timeseries Graph
117 (4 Moderate)n/mn/m10 (1 Low)17 (2 Low)
*2
02/05/2026
14:00:00
London Marylebone Road
Timeseries Graph
72 (3 Low)44 (1 Low)4 (1 Low)14 (2 Low)43 (3 Low)
*1
01/05/2026
18:15:00
London N. Kensington
Timeseries Graph
108 (4 Moderate)11 (1 Low)2 (1 Low)11 (1 Low)19 (2 Low)
*2
01/05/2026
19:45:00
London Norbury Manor School
Timeseries Graph
n/mn/mn/m11 (1 Low)17 (2 Low)
*2
02/05/2026
14:00:00
London Teddington Bushy Park
Timeseries Graph
n/mn/mn/mn/an/a 27/04/2026
05:00:00
London Westminster
Timeseries Graph
96 (3 Low)12 (1 Low)n/mn/mn/m 01/05/2026
20:00:00
Southwark A2 Old Kent Road
Timeseries Graph
n/m6 (1 Low)n/mn/m31 (2 Low)
*1
02/05/2026
11:00:00

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Highland

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Fort William
Timeseries Graph
98 (3 Low)30 (1 Low)n/mn/mn/m 02/05/2026
04:00:00
Inverness
Timeseries Graph
n/m25 (1 Low)n/m7 (1 Low)15 (1 Low)
*2
02/05/2026
18:00:00
Lerwick
Timeseries Graph
92 (3 Low)n/mn/mn/mn/m 01/05/2026
19:00:00
Strathvaich
Timeseries Graph
117 (4 Moderate)n/mn/mn/mn/m 01/05/2026
21:00:00

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North East

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Darlington Firthmoor
Timeseries Graph
n/mn/mn/m10 (1 Low)21 (2 Low)
*2
02/05/2026
01:00:00
Hartlepool St Abbs Walk
Timeseries Graph
96 (3 Low)29 (1 Low)n/m13 (2 Low)31 (2 Low)
*2
02/05/2026
01:00:00
Kielder Water
Timeseries Graph
96 (3 Low)n/mn/m9 (1 Low)15 (1 Low)
*2
02/05/2026
15:00:00
Middlesbrough
Timeseries Graph
111 (4 Moderate)15 (1 Low)2 (1 Low)9 (1 Low)27 (2 Low)
*1
01/05/2026
18:15:00
Newcastle Centre
Timeseries Graph
72 (3 Low)28 (1 Low)n/m15 (2 Low)32 (2 Low)
*1
02/05/2026
05:00:00
Newcastle Cradlewell Roadside
Timeseries Graph
n/m28 (1 Low)n/m12 (2 Low)26 (2 Low)
*2
02/05/2026
07:00:00
Redcar Milford Walk
Timeseries Graph
n/mn/mn/m13 (2 Low)33 (2 Low)
*2
02/05/2026
03:00:00
Stockton-on-Tees A1305 Roadside
Timeseries Graph
n/m15 (1 Low)n/m10 (1 Low)n/m 02/05/2026
06:00:00
Stockton-on-Tees Eaglescliffe
Timeseries Graph
n/m13 (1 Low)n/m9 (1 Low)24 (2 Low)
*1
02/05/2026
03:00:00
Sunderland Silksworth
Timeseries Graph
84 (3 Low)50 (1 Low)n/m15 (2 Low)29 (2 Low)
*2
02/05/2026
07:00:00
Sunderland Wessington Way
Timeseries Graph
n/m28 (1 Low)n/m13 (2 Low)n/m 02/05/2026
07:00:00

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North East Scotland

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Aberdeen Erroll Park
Timeseries Graph
83 (3 Low)21 (1 Low)n/m8 (1 Low)22 (2 Low)
*2
02/05/2026
01:00:00
Aberdeen Wellington Road
Timeseries Graph
n/m58 (1 Low)n/mn/mn/m 02/05/2026
15:00:00
Dundee Mains Loan
Timeseries Graph
n/m19 (1 Low)n/mn/mn/m 01/05/2026
19:00:00
Perth Glasgow Road
Timeseries Graph
n/m42 (1 Low)n/mn/mn/m 01/05/2026
20:00:00

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North Wales

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Aston Hill
Timeseries Graph
92 (3 Low)7 (1 Low)n/mn/mn/m 02/05/2026
17:00:00
Wrexham
Timeseries Graph
n/m24 (1 Low)2 (1 Low)12 (2 Low)24 (2 Low)
*2
01/05/2026
17:15:00

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North West & Merseyside

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Birkenhead Borough Road
Timeseries Graph
n/m25 (1 Low)n/m13 (2 Low)n/m 02/05/2026
16:00:00
Blackburn Accrington Road
Timeseries Graph
n/m31 (1 Low)n/mn/mn/m 01/05/2026
19:00:00
Blackburn Audley Park
Timeseries Graph
86 (3 Low)n/mn/m13 (2 Low)23 (2 Low)
*2
02/05/2026
06:00:00
Blackpool Marton
Timeseries Graph
95 (3 Low)20 (1 Low)n/m13 (2 Low)24 (2 Low)
*2
02/05/2026
03:00:00
Blackpool Whitegate Drive
Timeseries Graph
n/mn/mn/m14 (2 Low)n/m 02/05/2026
03:00:00
Bury Whitefield Roadside
Timeseries Graph
n/m21 (1 Low)n/mn/m34 (3 Low)
*1
02/05/2026
08:00:00
Carlisle Morton A595
Timeseries Graph
n/m22 (1 Low)n/m12 (2 Low)25 (2 Low)
*1
02/05/2026
07:00:00
Crewe Coppenhall
Timeseries Graph
95 (3 Low)22 (1 Low)n/m14 (2 Low)27 (2 Low)
*2
02/05/2026
04:00:00
Glazebury
Timeseries Graph
90 (3 Low)25 (1 Low)n/m13 (2 Low)24 (2 Low)
*2
02/05/2026
06:00:00
Liverpool Speke
Timeseries Graph
93 (3 Low)51 (1 Low)74 (1 Low)17 (2 Low)30 (2 Low)
*1
02/05/2026
08:45:00
Liverpool Thirlmere Park
Timeseries Graph
88 (3 Low)n/mn/m13 (2 Low)27 (2 Low)
*2
02/05/2026
18:00:00
Manchester Piccadilly
Timeseries Graph
83 (3 Low)23 (1 Low)2 (1 Low)20 (2 Low)34 (3 Low)
*2
02/05/2026
09:00:00
Manchester Sharston
Timeseries Graph
93 (3 Low)24 (1 Low)n/m15 (2 Low)27 (2 Low)
*2
02/05/2026
14:00:00
Middlewich St Michael's Way
Timeseries Graph
n/mn/mn/m14 (2 Low)n/m 02/05/2026
06:00:00
Preston
Timeseries Graph
87 (3 Low)27 (1 Low)n/m13 (2 Low)24 (2 Low)
*2
02/05/2026
06:00:00
Salford Eccles
Timeseries Graph
101 (4 Moderate)33 (1 Low)n/m16 (2 Low)34 (3 Low)
*2
02/05/2026
05:00:00
Shaw Crompton Way
Timeseries Graph
n/m33 (1 Low)n/mn/mn/m 01/05/2026
19:00:00
St Helens Linkway
Timeseries Graph
n/m42 (1 Low)n/mn/m26 (2 Low)
*1
01/05/2026
24:00:
Tameside A635 Manchester Road
Timeseries Graph
n/mn/mn/m17 (2 Low)n/m 02/05/2026
04:00:00
Warrington
Timeseries Graph
n/m17 (1 Low)n/m14 (2 Low)26 (2 Low)
*1
02/05/2026
15:00:00
Widnes Milton Road
Timeseries Graph
n/m45 (1 Low)n/mn/mn/m 02/05/2026
18:00:00
Wigan Centre
Timeseries Graph
85 (3 Low)n/an/m16 (2 Low)31 (2 Low)
*2
02/05/2026
18:00:00
Wirral Tranmere
Timeseries Graph
94 (3 Low)23 (1 Low)n/m12 (2 Low)23 (2 Low)
*2
02/05/2026
01:00:00

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Northern Ireland

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Armagh Roadside
Timeseries Graph
n/m42 (1 Low)n/mn/m26 (2 Low)
*1
01/05/2026
21:00:00
Ballymena Antrim Road
Timeseries Graph
n/m26 (1 Low)n/mn/mn/m 01/05/2026
22:00:00
Ballymena Ballykeel
Timeseries Graph
n/m25 (1 Low)5 (1 Low)n/mn/m 01/05/2026
14:15:00
Belfast Centre
Timeseries Graph
84 (3 Low)27 (1 Low)1 (1 Low)17 (2 Low)28 (2 Low)
*2
02/05/2026
07:30:00
Belfast Stockman's Lane
Timeseries Graph
n/m69 (2 Low)n/mn/m35 (3 Low)
*1
02/05/2026
13:00:00
Derry Rosemount
Timeseries Graph
86 (3 Low)13 (1 Low)2 (1 Low)8 (1 Low)23 (2 Low)
*1
02/05/2026
02:45:00
Lough Navar
Timeseries Graph
87 (3 Low)n/mn/m6 (1 Low)10 (1 Low)
*2
02/05/2026
01:00:00

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Scottish Borders

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Dumfries
Timeseries Graph
n/m24 (1 Low)n/mn/mn/m 01/05/2026
19:00:00
Eskdalemuir
Timeseries Graph
99 (3 Low)6 (1 Low)n/mn/mn/m 01/05/2026
19:00:00
Peebles
Timeseries Graph
92 (3 Low)8 (1 Low)n/mn/mn/m 01/05/2026
19:00:00

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South East

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Aylesbury A4157
Timeseries Graph
n/mn/mn/m11 (1 Low)n/m 02/05/2026
16:00:00
Brighton Preston Park
Timeseries Graph
86 (3 Low)26 (1 Low)n/m13 (2 Low)19 (2 Low)
*2
02/05/2026
14:00:00
Chatham Roadside
Timeseries Graph
n/m21 (1 Low)n/m10 (1 Low)28 (2 Low)
*1
02/05/2026
17:00:00
Chilbolton Observatory
Timeseries Graph
100 (3 Low)15 (1 Low)4 (1 Low)12 (2 Low)19 (2 Low)
*2
02/05/2026
13:15:00
Eastbourne
Timeseries Graph
91 (3 Low)16 (1 Low)n/m11 (1 Low)18 (2 Low)
*2
02/05/2026
12:00:00
Farnborough Cherrywood
Timeseries Graph
n/mn/mn/m12 (2 Low)17 (2 Low)
*2
02/05/2026
18:00:00
Horley
Timeseries Graph
n/m29 (1 Low)n/m14 (2 Low)21 (2 Low)
*2
02/05/2026
13:00:00
Lullington Heath
Timeseries Graph
102 (4 Moderate)12 (1 Low)18 (1 Low)12 (2 Low)17 (2 Low)
*2
01/05/2026
19:30:00
Maidstone Upper Stone Street
Timeseries Graph
n/mn/mn/m15 (2 Low)29 (2 Low)
*2
02/05/2026
13:00:00
Milton Keynes Civic Centre
Timeseries Graph
110 (4 Moderate)n/mn/m12 (2 Low)23 (2 Low)
*2
02/05/2026
18:00:00
Oxford Centre Roadside
Timeseries Graph
n/m22 (1 Low)n/mn/mn/m 02/05/2026
01:00:00
Oxford St Ebbes
Timeseries Graph
95 (3 Low)24 (1 Low)n/m11 (1 Low)18 (2 Low)
*2
02/05/2026
15:00:00
Portsmouth
Timeseries Graph
86 (3 Low)28 (1 Low)n/m13 (2 Low)20 (2 Low)
*2
02/05/2026
12:00:00
Portsmouth Anglesea Road
Timeseries Graph
n/m41 (1 Low)n/m14 (2 Low)21 (2 Low)
*2
02/05/2026
18:00:00
Reading London Road
Timeseries Graph
n/m12 (1 Low)n/mn/m23 (2 Low)
*1
02/05/2026
10:00:00
Reading New Town
Timeseries Graph
99 (3 Low)13 (1 Low)n/m11 (1 Low)19 (2 Low)
*2
02/05/2026
14:00:00
Reading Rose Kiln Lane
Timeseries Graph
n/mn/mn/m11 (1 Low)n/m 02/05/2026
14:00:00
Rochester Stoke
Timeseries Graph
95 (3 Low)30 (1 Low)2 (1 Low)14 (2 Low)21 (2 Low)
*2
02/05/2026
14:30:00
Slough Windmill Bath Road
Timeseries Graph
n/mn/mn/m13 (2 Low)25 (2 Low)
*2
02/05/2026
15:00:00
Southampton A33
Timeseries Graph
n/m67 (1 Low)n/m14 (2 Low)22 (2 Low)
*2
02/05/2026
17:00:00
Southampton Centre
Timeseries Graph
87 (3 Low)90 (2 Low)18 (1 Low)18 (2 Low)26 (2 Low)
*2
02/05/2026
12:30:00
Storrington Roadside
Timeseries Graph
n/m33 (1 Low)n/m16 (2 Low)24 (2 Low)
*2
02/05/2026
14:00:00
Worthing A27 Roadside
Timeseries Graph
n/m34 (1 Low)n/m16 (2 Low)n/m 02/05/2026
18:00:00
Worthing East Ten Acres
Timeseries Graph
n/mn/mn/m14 (2 Low)22 (2 Low)
*2
02/05/2026
12:00:00

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South Wales

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Cardiff Centre
Timeseries Graph
105 (4 Moderate)n/an/a10 (1 Low)26 (2 Low)
*1
30/04/2026
15:15:00
Cardiff Newport Road
Timeseries Graph
n/m39 (1 Low)n/mn/m25 (2 Low)
*1
02/05/2026
18:00:00
Chepstow A48
Timeseries Graph
n/m50 (1 Low)n/m14 (2 Low)25 (2 Low)
*1
02/05/2026
03:00:00
Cwmbran Crownbridge
Timeseries Graph
95 (3 Low)25 (1 Low)n/mn/mn/m 02/05/2026
17:00:00
Hafod-yr-ynys Hill Roadside
Timeseries Graph
n/m57 (1 Low)n/mn/mn/m 01/05/2026
21:00:00
Narberth
Timeseries Graph
93 (3 Low)2 (1 Low)2 (1 Low)11 (1 Low)17 (2 Low)
*2
02/05/2026
17:45:00
Newport
Timeseries Graph
n/m24 (1 Low)n/m12 (2 Low)27 (2 Low)
*2
02/05/2026
14:00:00
Port Talbot Margam
Timeseries Graph
91 (3 Low)20 (1 Low)1 (1 Low)9 (1 Low)20 (2 Low)
*3
01/05/2026
23:00:00
Swansea Roadside
Timeseries Graph
n/m32 (1 Low)n/m13 (2 Low)21 (2 Low)
*1
02/05/2026
15:00:00

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South West

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Barnstaple A39
Timeseries Graph
n/mn/mn/m10 (1 Low)17 (2 Low)
*2
02/05/2026
18:00:00
Bath A4 Roadside
Timeseries Graph
n/mn/an/mn/mn/m 22/03/2026
17:00:00
Bournemouth
Timeseries Graph
100 (3 Low)11 (1 Low)n/m14 (2 Low)n/m 02/05/2026
15:00:00
Bristol Patchway
Timeseries Graph
n/mn/mn/m12 (2 Low)21 (2 Low)
*2
02/05/2026
15:00:00
Bristol St Paul's
Timeseries Graph
92 (3 Low)56 (1 Low)n/m12 (2 Low)25 (2 Low)
*1
02/05/2026
10:00:00
Bristol Temple Way
Timeseries Graph
n/m54 (1 Low)n/m11 (1 Low)21 (2 Low)
*2
02/05/2026
18:00:00
Charlton Mackrell
Timeseries Graph
92 (3 Low)6 (1 Low)n/m11 (1 Low)17 (2 Low)
*2
02/05/2026
11:00:00
Cheltenham A40 Gloucester Road
Timeseries Graph
n/mn/mn/m9 (1 Low)n/m 02/05/2026
12:00:00
Christchurch Barrack Road
Timeseries Graph
n/m25 (1 Low)n/m14 (2 Low)n/m 02/05/2026
18:00:00
Exeter Roadside
Timeseries Graph
76 (3 Low)46 (1 Low)n/mn/mn/m 01/05/2026
24:00:
Gloucester Tredworth
Timeseries Graph
n/mn/mn/m15 (2 Low)25 (2 Low)
*2
02/05/2026
14:00:00
Honiton
Timeseries Graph
90 (3 Low)13 (1 Low)n/m11 (1 Low)19 (2 Low)
*2
02/05/2026
11:00:00
Plymouth Centre
Timeseries Graph
89 (3 Low)61 (1 Low)n/m19 (2 Low)55 (4 Moderate)
*2
02/05/2026
08:00:00
Plymouth Tavistock Road
Timeseries Graph
n/m24 (1 Low)n/mn/mn/m 01/05/2026
24:00:
Saltash Callington Road
Timeseries Graph
n/mn/mn/m9 (1 Low)23 (2 Low)
*1
02/05/2026
13:00:00
Swindon Walcot
Timeseries Graph
93 (3 Low)12 (1 Low)n/m11 (1 Low)20 (2 Low)
*2
02/05/2026
12:00:00
Yarner Wood
Timeseries Graph
97 (3 Low)17 (1 Low)n/m9 (1 Low)16 (1 Low)
*2
02/05/2026
14:00:00

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West Ireland

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Mace Head
Timeseries Graph
107 (4 Moderate)n/mn/mn/mn/m 01/05/2026
23:00:00

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West Midlands

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Birmingham A4540 Roadside
Timeseries Graph
85 (3 Low)35 (1 Low)n/m12 (2 Low)29 (2 Low)
*2
02/05/2026
13:00:00
Birmingham Hall Green
Timeseries Graph
107 (4 Moderate)16 (1 Low)n/m11 (1 Low)26 (2 Low)
*2
02/05/2026
15:00:00
Birmingham Ladywood
Timeseries Graph
69 (3 Low)18 (1 Low)2 (1 Low)11 (1 Low)24 (2 Low)
*2
02/05/2026
15:00:00
Birmingham University
Timeseries Graph
n/mn/mn/m11 (1 Low)23 (2 Low)
*2
02/05/2026
14:00:00
Burton-on-Trent Horninglow
Timeseries Graph
112 (4 Moderate)31 (1 Low)n/m12 (2 Low)25 (2 Low)
*2
02/05/2026
01:00:00
Cannock A5190 Roadside
Timeseries Graph
n/m18 (1 Low)n/m14 (2 Low)n/m 02/05/2026
11:00:00
Coventry Allesley
Timeseries Graph
99 (3 Low)11 (1 Low)n/m11 (1 Low)23 (2 Low)
*2
02/05/2026
17:00:00
Coventry Binley Road
Timeseries Graph
n/m41 (1 Low)n/m12 (2 Low)24 (2 Low)
*2
02/05/2026
17:00:00
Leamington Spa
Timeseries Graph
102 (4 Moderate)22 (1 Low)n/m12 (2 Low)22 (2 Low)
*2
02/05/2026
16:00:00
Leamington Spa Rugby Road
Timeseries Graph
n/m17 (1 Low)n/m12 (2 Low)19 (2 Low)
*2
02/05/2026
16:00:00
Leominster
Timeseries Graph
93 (3 Low)10 (1 Low)n/mn/mn/m 02/05/2026
18:00:00
Oldbury Birmingham Road
Timeseries Graph
n/m34 (1 Low)n/m13 (2 Low)28 (2 Low)
*2
02/05/2026
15:00:00
Shrewsbury Underdale
Timeseries Graph
n/mn/mn/m16 (2 Low)29 (2 Low)
*2
02/05/2026
03:00:00
Stoke-on-Trent A50 Roadside
Timeseries Graph
n/m64 (1 Low)n/m16 (2 Low)33 (2 Low)
*2
02/05/2026
03:00:00
Stoke-on-Trent Centre
Timeseries Graph
86 (3 Low)23 (1 Low)n/m16 (2 Low)33 (2 Low)
*2
02/05/2026
10:00:00
Telford Hollinswood
Timeseries Graph
106 (4 Moderate)16 (1 Low)n/m11 (1 Low)25 (2 Low)
*2
02/05/2026
11:00:00
Walsall Caldmore
Timeseries Graph
n/mn/mn/m13 (2 Low)24 (2 Low)
*2
02/05/2026
13:00:00
Walsall Woodlands
Timeseries Graph
105 (4 Moderate)13 (1 Low)n/mn/mn/m 02/05/2026
18:00:00
West Bromwich Kenrick Park
Timeseries Graph
94 (3 Low)21 (1 Low)n/mn/mn/m 02/05/2026
18:00:00
Worcester Tolladine
Timeseries Graph
n/mn/mn/m11 (1 Low)22 (2 Low)
*2
02/05/2026
13:00:00

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Yorkshire & Humberside

24 Hour Summary, based on data provided by Environment Agency
Monitoring site Running 8 Hour mean Ozone
(µgm-3)
Hourly mean
Nitrogen dioxide
(µgm-3)
Max 15 min mean
Sulphur dioxide
(µgm-3)
Running 24 Hour mean
PM2.5
Particles
(µgm-3)
Running 24 Hour mean
PM10
Particles
(µgm-3)
Last
updated
Barnsley Gawber
Timeseries Graph
104 (4 Moderate)15 (1 Low)4 (1 Low)14 (2 Low)28 (2 Low)
*2
01/05/2026
20:15:00
Bradford Mayo Avenue
Timeseries Graph
n/m47 (1 Low)n/mn/mn/m 02/05/2026
17:00:00
Bradford Shipley Airedale Road
Timeseries Graph
n/mn/mn/m14 (2 Low)39 (3 Low)
*2
02/05/2026
01:00:00
Dewsbury Ashworth Grange
Timeseries Graph
92 (3 Low)16 (1 Low)n/m13 (2 Low)28 (2 Low)
*2
02/05/2026
01:00:00
Doncaster A630 Cleveland Street
Timeseries Graph
n/m39 (1 Low)n/m12 (2 Low)n/m 02/05/2026
07:00:00
Harrogate Woodlands
Timeseries Graph
n/mn/mn/m10 (1 Low)23 (2 Low)
*2
02/05/2026
05:00:00
High Muffles
Timeseries Graph
106 (4 Moderate)7 (1 Low)n/m8 (1 Low)23 (2 Low)
*2
02/05/2026
02:00:00
Hull Freetown
Timeseries Graph
94 (3 Low)41 (1 Low)2 (1 Low)12 (2 Low)28 (2 Low)
*2
01/05/2026
23:00:00
Hull Holderness Road
Timeseries Graph
n/m55 (1 Low)n/m10 (1 Low)22 (2 Low)
*2
02/05/2026
07:00:00
Immingham Woodlands Avenue
Timeseries Graph
100 (3 Low)23 (1 Low)n/m12 (2 Low)26 (2 Low)
*2
02/05/2026
12:00:00
Leeds Centre
Timeseries Graph
94 (3 Low)30 (1 Low)4 (1 Low)14 (2 Low)30 (2 Low)
*2
02/05/2026
06:30:00
Leeds Headingley Kerbside
Timeseries Graph
n/m29 (1 Low)n/m17 (2 Low)35 (3 Low)
*1
02/05/2026
06:00:00
Rotherham East Dene
Timeseries Graph
n/mn/mn/m14 (2 Low)28 (2 Low)
*2
02/05/2026
08:00:00
Scunthorpe Town
Timeseries Graph
n/m22 (1 Low)6 (1 Low)13 (2 Low)36 (3 Low)
*1
01/05/2026
20:45:00
Sheffield Barnsley Road
Timeseries Graph
n/m42 (1 Low)n/m17 (2 Low)n/m 02/05/2026
08:00:00
Sheffield Devonshire Green
Timeseries Graph
113 (4 Moderate)19 (1 Low)n/m16 (2 Low)29 (2 Low)
*2
02/05/2026
09:00:00
Sheffield Tinsley
Timeseries Graph
97 (3 Low)30 (1 Low)n/m14 (2 Low)28 (2 Low)
*2
02/05/2026
08:00:00
Wakefield Alverthorpe
Timeseries Graph
n/mn/mn/m13 (2 Low)29 (2 Low)
*2
02/05/2026
08:00:00
York Bootham
Timeseries Graph
100 (3 Low)18 (1 Low)n/m11 (1 Low)26 (2 Low)
*1
02/05/2026
04:00:00
York Fishergate
Timeseries Graph
n/m27 (1 Low)n/m8 (1 Low)33 (2 Low)
*1
02/05/2026
01:00:00

Legend

  • n/m means that the pollutant is not measured at that site
  • n/a means that no data were recorded for the period
  • *1: measurements are PM10 BAM 1020 heated
  • *2: measurements are PM10 FIDAS
  • *3: measurements are PM10 SEQ 47/50