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 10pm Fri 1st 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
82 (3 Low)n/mn/m6 (1 Low)14 (1 Low)
*2
01/05/2026
22:00:00
Bush Estate
Timeseries Graph
99 (3 Low)20 (1 Low)n/mn/mn/m 30/04/2026
23:00:00
Dumbarton Roadside
Timeseries Graph
n/m30 (1 Low)n/mn/mn/m 01/05/2026
09:00:00
Edinburgh Nicolson Street
Timeseries Graph
n/m59 (1 Low)n/mn/mn/m 01/05/2026
19:00:00
Edinburgh St Leonards
Timeseries Graph
90 (3 Low)28 (1 Low)3 (1 Low)8 (1 Low)18 (2 Low)
*2
01/05/2026
12:15:00
Glasgow Great Western Road
Timeseries Graph
n/m36 (1 Low)n/mn/mn/m 01/05/2026
17:00:00
Glasgow High Street
Timeseries Graph
n/m28 (1 Low)n/m10 (1 Low)25 (2 Low)
*2
01/05/2026
22:00:00
Glasgow Kerbside
Timeseries Graph
n/m93 (2 Low)n/mn/mn/m 01/05/2026
10:00:00
Glasgow Townhead
Timeseries Graph
92 (3 Low)22 (1 Low)n/m9 (1 Low)21 (2 Low)
*2
01/05/2026
22:00:00
Grangemouth
Timeseries Graph
n/m34 (1 Low)5 (1 Low)10 (1 Low)24 (2 Low)
*1
01/05/2026
13:15:00
Grangemouth Moray
Timeseries Graph
n/m35 (1 Low)n/mn/mn/m 01/05/2026
16:00:00
Greenock A8 Roadside
Timeseries Graph
n/m41 (1 Low)n/m9 (1 Low)21 (2 Low)
*2
01/05/2026
22:00:00

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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)35 (1 Low)n/m9 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00
Chesterfield Roadside
Timeseries Graph
n/m45 (1 Low)n/m10 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Derby St Alkmund's Way
Timeseries Graph
n/m54 (1 Low)n/m12 (2 Low)n/m 01/05/2026
21:00:00
Derby Stockbrook Park
Timeseries Graph
102 (4 Moderate)n/mn/m11 (1 Low)28 (2 Low)
*2
01/05/2026
21:00:00
Ladybower
Timeseries Graph
118 (4 Moderate)14 (1 Low)6 (1 Low)14 (2 Low)29 (2 Low)
*2
01/05/2026
14:00:00
Leicester A594 Roadside
Timeseries Graph
n/m54 (1 Low)n/m11 (1 Low)28 (2 Low)
*2
01/05/2026
22:00:00
Leicester University
Timeseries Graph
109 (4 Moderate)29 (1 Low)n/m9 (1 Low)23 (2 Low)
*2
01/05/2026
22:00:00
Lincoln Canwick Road
Timeseries Graph
n/m77 (2 Low)n/mn/mn/m 01/05/2026
08:00:00
Loughborough Thorpe Acre
Timeseries Graph
n/mn/mn/m10 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00
Mansfield Ladybrook
Timeseries Graph
n/mn/mn/m10 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Northampton Spring Park
Timeseries Graph
110 (4 Moderate)23 (1 Low)n/m11 (1 Low)n/m 01/05/2026
08:00:00
Nottingham Bilborough
Timeseries Graph
n/mn/mn/m11 (1 Low)27 (2 Low)
*2
01/05/2026
22:00:00
Nottingham Kenmore Gardens
Timeseries Graph
104 (4 Moderate)19 (1 Low)6 (1 Low)12 (2 Low)29 (2 Low)
*2
30/04/2026
23:00:00
Nottingham Western Boulevard
Timeseries Graph
n/m55 (1 Low)n/m11 (1 Low)29 (2 Low)
*2
01/05/2026
22:00:00
Tallington
Timeseries Graph
124 (5 Moderate)n/mn/m10 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Toft Newton
Timeseries Graph
128 (5 Moderate)12 (1 Low)n/m8 (1 Low)22 (2 Low)
*2
01/05/2026
22:00:00

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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/m36 (1 Low)n/m8 (1 Low)26 (2 Low)
*2
01/05/2026
20:00:00
Cambridge King's Hedges
Timeseries Graph
n/mn/mn/m8 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Cambridge Roadside
Timeseries Graph
n/m46 (1 Low)n/mn/mn/m 01/05/2026
17:00:00
Luton A505 Roadside
Timeseries Graph
n/m47 (1 Low)n/m8 (1 Low)n/m 01/05/2026
16:00:00
Norwich Lakenfields
Timeseries Graph
102 (4 Moderate)22 (1 Low)n/m7 (1 Low)18 (2 Low)
*2
01/05/2026
22:00:00
Peterborough Garton End
Timeseries Graph
n/mn/mn/m11 (1 Low)30 (2 Low)
*2
01/05/2026
22:00:00
Sibton
Timeseries Graph
100 (3 Low)n/mn/m11 (1 Low)25 (2 Low)
*2
01/05/2026
21:00:00
Southend Shoeburyness
Timeseries Graph
n/mn/mn/m7 (1 Low)23 (2 Low)
*2
01/05/2026
22:00:00
Southend-on-Sea
Timeseries Graph
100 (3 Low)28 (1 Low)n/m7 (1 Low)27 (2 Low)
*2
01/05/2026
02:00:00
St Osyth
Timeseries Graph
102 (4 Moderate)19 (1 Low)n/m9 (1 Low)31 (2 Low)
*2
01/05/2026
20:00:00
Stanford-le-Hope Roadside
Timeseries Graph
n/m61 (1 Low)n/m11 (1 Low)28 (2 Low)
*1
01/05/2026
12:00:00
Stevenage St Georges Way South
Timeseries Graph
n/mn/mn/m7 (1 Low)n/m 01/05/2026
22:00:00
Thurrock
Timeseries Graph
n/an/a2 (1 Low)9 (1 Low)29 (2 Low)
*2
01/05/2026
21:00:00
Weybourne
Timeseries Graph
112 (4 Moderate)n/mn/m6 (1 Low)17 (2 Low)
*2
01/05/2026
01:00:00
Wicken Fen
Timeseries Graph
105 (4 Moderate)12 (1 Low)4 (1 Low)8 (1 Low)25 (2 Low)
*2
01/05/2026
07:45:00

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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/m70 (2 Low)n/m13 (2 Low)43 (3 Low)
*1
01/05/2026
12:00:00
Ealing Horn Lane
Timeseries Graph
n/mn/mn/mn/m45 (3 Low)
*1
01/05/2026
17:00:00
Haringey Roadside
Timeseries Graph
n/m57 (1 Low)n/mn/mn/m 01/05/2026
03:00:00
London A406 N Circular
Timeseries Graph
n/mn/mn/m9 (1 Low)n/m 01/05/2026
14:00:00
London Bexley
Timeseries Graph
n/m71 (2 Low)n/m8 (1 Low)27 (2 Low)
*2
01/05/2026
12:00:00
London Bloomsbury
Timeseries Graph
99 (3 Low)56 (1 Low)2 (1 Low)9 (1 Low)32 (2 Low)
*2
30/04/2026
22:15:00
London Farringdon Street
Timeseries Graph
n/m59 (1 Low)n/m10 (1 Low)n/m 01/05/2026
12:00:00
London Haringey Priory Park South
Timeseries Graph
109 (4 Moderate)40 (1 Low)n/m8 (1 Low)29 (2 Low)
*2
01/05/2026
13:00:00
London Harlington
Timeseries Graph
103 (4 Moderate)62 (1 Low)n/m7 (1 Low)27 (2 Low)
*2
01/05/2026
02:00:00
London Hillingdon
Timeseries Graph
90 (3 Low)62 (1 Low)n/m10 (1 Low)35 (3 Low)
*2
01/05/2026
12:00:00
London Honor Oak Park
Timeseries Graph
117 (4 Moderate)n/mn/m8 (1 Low)26 (2 Low)
*2
01/05/2026
03:00:00
London Marylebone Road
Timeseries Graph
71 (3 Low)80 (2 Low)6 (1 Low)14 (2 Low)43 (3 Low)
*1
01/05/2026
11:00:00
London N. Kensington
Timeseries Graph
108 (4 Moderate)45 (1 Low)3 (1 Low)8 (1 Low)27 (2 Low)
*2
01/05/2026
10:45:00
London Norbury Manor School
Timeseries Graph
n/mn/mn/m8 (1 Low)25 (2 Low)
*2
01/05/2026
01:00:00
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)49 (1 Low)n/mn/mn/m 01/05/2026
20:00:00
Southwark A2 Old Kent Road
Timeseries Graph
n/m55 (1 Low)n/mn/m54 (4 Moderate)
*1
01/05/2026
07:00:00

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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
94 (3 Low)30 (1 Low)n/mn/mn/m 30/04/2026
23:00:00
Inverness
Timeseries Graph
n/m24 (1 Low)n/m4 (1 Low)13 (1 Low)
*2
01/05/2026
22:00:00
Lerwick
Timeseries Graph
97 (3 Low)n/mn/mn/mn/m 01/05/2026
07:00:00
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)23 (2 Low)
*2
01/05/2026
22:00:00
Hartlepool St Abbs Walk
Timeseries Graph
101 (4 Moderate)33 (1 Low)n/m12 (2 Low)31 (2 Low)
*2
01/05/2026
22:00:00
Kielder Water
Timeseries Graph
96 (3 Low)n/mn/m6 (1 Low)15 (1 Low)
*2
01/05/2026
22:00:00
Middlesbrough
Timeseries Graph
111 (4 Moderate)27 (1 Low)3 (1 Low)9 (1 Low)28 (2 Low)
*1
01/05/2026
12:30:00
Newcastle Centre
Timeseries Graph
72 (3 Low)63 (1 Low)n/m13 (2 Low)34 (3 Low)
*1
01/05/2026
22:00:00
Newcastle Cradlewell Roadside
Timeseries Graph
n/m80 (2 Low)n/m11 (1 Low)27 (2 Low)
*2
01/05/2026
22:00:00
Redcar Milford Walk
Timeseries Graph
n/mn/mn/m13 (2 Low)34 (3 Low)
*2
01/05/2026
22:00:00
Stockton-on-Tees A1305 Roadside
Timeseries Graph
n/m24 (1 Low)n/m10 (1 Low)n/m 01/05/2026
22:00:00
Stockton-on-Tees Eaglescliffe
Timeseries Graph
n/m15 (1 Low)n/m8 (1 Low)26 (2 Low)
*1
01/05/2026
22:00:00
Sunderland Silksworth
Timeseries Graph
96 (3 Low)50 (1 Low)n/m12 (2 Low)29 (2 Low)
*2
01/05/2026
22:00:00
Sunderland Wessington Way
Timeseries Graph
n/m31 (1 Low)n/m11 (1 Low)n/m 01/05/2026
22:00:00

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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
84 (3 Low)36 (1 Low)n/m9 (1 Low)23 (2 Low)
*2
01/05/2026
18:00:00
Aberdeen Wellington Road
Timeseries Graph
n/m54 (1 Low)n/mn/mn/m 01/05/2026
09:00:00
Dundee Mains Loan
Timeseries Graph
n/m29 (1 Low)n/mn/mn/m 01/05/2026
16:00:00
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
110 (4 Moderate)9 (1 Low)n/mn/mn/m 30/04/2026
23:00:00
Wrexham
Timeseries Graph
n/m40 (1 Low)4 (1 Low)12 (2 Low)26 (2 Low)
*2
01/05/2026
15:30:00

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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/m45 (1 Low)n/m12 (2 Low)n/m 01/05/2026
22:00:00
Blackburn Accrington Road
Timeseries Graph
n/m32 (1 Low)n/mn/mn/m 01/05/2026
10:00:00
Blackburn Audley Park
Timeseries Graph
89 (3 Low)n/mn/m11 (1 Low)25 (2 Low)
*2
01/05/2026
22:00:00
Blackpool Marton
Timeseries Graph
96 (3 Low)29 (1 Low)n/m12 (2 Low)25 (2 Low)
*2
01/05/2026
22:00:00
Blackpool Whitegate Drive
Timeseries Graph
n/mn/mn/m12 (2 Low)n/m 01/05/2026
22:00:00
Bury Whitefield Roadside
Timeseries Graph
n/m37 (1 Low)n/mn/m36 (3 Low)
*1
01/05/2026
03:00:00
Carlisle Morton A595
Timeseries Graph
n/m26 (1 Low)n/m11 (1 Low)25 (2 Low)
*1
01/05/2026
22:00:00
Crewe Coppenhall
Timeseries Graph
104 (4 Moderate)27 (1 Low)n/m12 (2 Low)27 (2 Low)
*2
01/05/2026
22:00:00
Glazebury
Timeseries Graph
93 (3 Low)34 (1 Low)n/m11 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Liverpool Speke
Timeseries Graph
102 (4 Moderate)47 (1 Low)15 (1 Low)15 (2 Low)30 (2 Low)
*1
01/05/2026
11:30:00
Liverpool Thirlmere Park
Timeseries Graph
98 (3 Low)n/mn/m12 (2 Low)27 (2 Low)
*2
01/05/2026
22:00:00
Manchester Piccadilly
Timeseries Graph
83 (3 Low)57 (1 Low)10 (1 Low)14 (2 Low)33 (2 Low)
*2
01/05/2026
07:45:00
Manchester Sharston
Timeseries Graph
93 (3 Low)47 (1 Low)n/m10 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Middlewich St Michael's Way
Timeseries Graph
n/mn/mn/m12 (2 Low)n/m 01/05/2026
22:00:00
Preston
Timeseries Graph
91 (3 Low)27 (1 Low)n/m12 (2 Low)25 (2 Low)
*2
01/05/2026
22:00:00
Salford Eccles
Timeseries Graph
101 (4 Moderate)59 (1 Low)n/m15 (2 Low)37 (3 Low)
*2
01/05/2026
22:00:00
Shaw Crompton Way
Timeseries Graph
n/m59 (1 Low)n/mn/mn/m 01/05/2026
08:00:00
St Helens Linkway
Timeseries Graph
n/m52 (1 Low)n/mn/m27 (2 Low)
*1
01/05/2026
07:00:00
Tameside A635 Manchester Road
Timeseries Graph
n/mn/mn/m19 (2 Low)n/m 01/05/2026
22:00:00
Warrington
Timeseries Graph
n/m35 (1 Low)n/m9 (1 Low)29 (2 Low)
*1
01/05/2026
22:00:00
Widnes Milton Road
Timeseries Graph
n/m51 (1 Low)n/mn/mn/m 01/05/2026
08:00:00
Wigan Centre
Timeseries Graph
90 (3 Low)n/an/m14 (2 Low)34 (3 Low)
*2
01/05/2026
22:00:00
Wirral Tranmere
Timeseries Graph
103 (4 Moderate)23 (1 Low)n/m11 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00

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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/m30 (2 Low)
*1
01/05/2026
15:00:00
Ballymena Antrim Road
Timeseries Graph
n/m37 (1 Low)n/mn/mn/m 01/05/2026
08:00:00
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)45 (1 Low)2 (1 Low)14 (2 Low)26 (2 Low)
*2
30/04/2026
24:00:
Belfast Stockman's Lane
Timeseries Graph
n/m79 (2 Low)n/mn/m32 (2 Low)
*1
01/05/2026
08:00:00
Derry Rosemount
Timeseries Graph
97 (3 Low)22 (1 Low)3 (1 Low)8 (1 Low)23 (2 Low)
*1
30/04/2026
23:30:00
Lough Navar
Timeseries Graph
87 (3 Low)n/mn/m7 (1 Low)14 (1 Low)
*2
01/05/2026
12:00:00

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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/m51 (1 Low)n/mn/mn/m 01/05/2026
11:00:00
Eskdalemuir
Timeseries Graph
102 (4 Moderate)6 (1 Low)n/mn/mn/m 01/05/2026
17:00:00
Peebles
Timeseries Graph
97 (3 Low)9 (1 Low)n/mn/mn/m 30/04/2026
23:00:00

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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/m7 (1 Low)n/m 01/05/2026
22:00:00
Brighton Preston Park
Timeseries Graph
90 (3 Low)23 (1 Low)n/m7 (1 Low)19 (2 Low)
*2
01/05/2026
22:00:00
Chatham Roadside
Timeseries Graph
n/m42 (1 Low)n/m8 (1 Low)35 (3 Low)
*1
01/05/2026
01:00:00
Chilbolton Observatory
Timeseries Graph
112 (4 Moderate)15 (1 Low)3 (1 Low)7 (1 Low)20 (2 Low)
*2
01/05/2026
13:30:00
Eastbourne
Timeseries Graph
94 (3 Low)29 (1 Low)n/m8 (1 Low)20 (2 Low)
*2
01/05/2026
22:00:00
Farnborough Cherrywood
Timeseries Graph
n/mn/mn/m7 (1 Low)21 (2 Low)
*2
01/05/2026
17:00:00
Horley
Timeseries Graph
n/m23 (1 Low)n/m9 (1 Low)24 (2 Low)
*2
01/05/2026
19:00:00
Lullington Heath
Timeseries Graph
106 (4 Moderate)12 (1 Low)18 (1 Low)7 (1 Low)17 (2 Low)
*2
01/05/2026
19:30:00
Maidstone Upper Stone Street
Timeseries Graph
n/mn/mn/m11 (1 Low)35 (3 Low)
*2
01/05/2026
22:00:00
Milton Keynes Civic Centre
Timeseries Graph
110 (4 Moderate)n/mn/m8 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Oxford Centre Roadside
Timeseries Graph
n/m49 (1 Low)n/mn/mn/m 01/05/2026
04:00:00
Oxford St Ebbes
Timeseries Graph
102 (4 Moderate)12 (1 Low)n/m7 (1 Low)20 (2 Low)
*2
01/05/2026
22:00:00
Portsmouth
Timeseries Graph
94 (3 Low)27 (1 Low)n/m7 (1 Low)19 (2 Low)
*2
01/05/2026
22:00:00
Portsmouth Anglesea Road
Timeseries Graph
n/m35 (1 Low)n/m8 (1 Low)22 (2 Low)
*2
01/05/2026
22:00:00
Reading London Road
Timeseries Graph
n/m54 (1 Low)n/mn/m27 (2 Low)
*1
01/05/2026
07:00:00
Reading New Town
Timeseries Graph
99 (3 Low)46 (1 Low)n/m8 (1 Low)24 (2 Low)
*2
01/05/2026
17:00:00
Reading Rose Kiln Lane
Timeseries Graph
n/mn/mn/m8 (1 Low)n/m 01/05/2026
17:00:00
Rochester Stoke
Timeseries Graph
95 (3 Low)31 (1 Low)3 (1 Low)8 (1 Low)25 (2 Low)
*2
01/05/2026
13:15:00
Slough Windmill Bath Road
Timeseries Graph
n/mn/mn/m9 (1 Low)33 (2 Low)
*2
01/05/2026
13:00:00
Southampton A33
Timeseries Graph
n/m86 (2 Low)n/m8 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00
Southampton Centre
Timeseries Graph
98 (3 Low)36 (1 Low)10 (1 Low)8 (1 Low)29 (2 Low)
*2
01/05/2026
12:45:00
Storrington Roadside
Timeseries Graph
n/m58 (1 Low)n/m8 (1 Low)28 (2 Low)
*2
01/05/2026
22:00:00
Worthing A27 Roadside
Timeseries Graph
n/m34 (1 Low)n/m11 (1 Low)n/m 01/05/2026
22:00:00
Worthing East Ten Acres
Timeseries Graph
n/mn/mn/m9 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00

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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)30 (1 Low)3 (1 Low)10 (1 Low)26 (2 Low)
*1
30/04/2026
15:15:00
Cardiff Newport Road
Timeseries Graph
n/m55 (1 Low)n/mn/m31 (2 Low)
*1
01/05/2026
09:00:00
Chepstow A48
Timeseries Graph
n/m50 (1 Low)n/m14 (2 Low)25 (2 Low)
*1
01/05/2026
20:00:00
Cwmbran Crownbridge
Timeseries Graph
102 (4 Moderate)27 (1 Low)n/mn/mn/m 30/04/2026
23:00:00
Hafod-yr-ynys Hill Roadside
Timeseries Graph
n/m57 (1 Low)n/mn/mn/m 01/05/2026
21:00:00
Narberth
Timeseries Graph
103 (4 Moderate)6 (1 Low)2 (1 Low)10 (1 Low)37 (3 Low)
*2
01/05/2026
14:15:00
Newport
Timeseries Graph
n/m29 (1 Low)n/m9 (1 Low)30 (2 Low)
*2
01/05/2026
22:00:00
Port Talbot Margam
Timeseries Graph
105 (4 Moderate)20 (1 Low)5 (1 Low)8 (1 Low)22 (2 Low)
*3
01/05/2026
06:15:00
Swansea Roadside
Timeseries Graph
n/m36 (1 Low)n/m11 (1 Low)30 (2 Low)
*1
01/05/2026
22:00:00

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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/m9 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00
Bath A4 Roadside
Timeseries Graph
n/mn/an/mn/mn/m 22/03/2026
17:00:00
Bournemouth
Timeseries Graph
101 (4 Moderate)14 (1 Low)n/m11 (1 Low)n/m 01/05/2026
22:00:00
Bristol Patchway
Timeseries Graph
n/mn/mn/m9 (1 Low)21 (2 Low)
*2
01/05/2026
22:00:00
Bristol St Paul's
Timeseries Graph
99 (3 Low)35 (1 Low)n/m10 (1 Low)25 (2 Low)
*1
01/05/2026
22:00:00
Bristol Temple Way
Timeseries Graph
n/m63 (1 Low)n/m9 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00
Charlton Mackrell
Timeseries Graph
103 (4 Moderate)14 (1 Low)n/m8 (1 Low)19 (2 Low)
*2
01/05/2026
22:00:00
Cheltenham A40 Gloucester Road
Timeseries Graph
n/mn/mn/m9 (1 Low)n/m 01/05/2026
18:00:00
Christchurch Barrack Road
Timeseries Graph
n/m23 (1 Low)n/m8 (1 Low)n/m 01/05/2026
22:00:00
Exeter Roadside
Timeseries Graph
103 (4 Moderate)44 (1 Low)n/mn/mn/m 30/04/2026
23:00:00
Gloucester Tredworth
Timeseries Graph
n/mn/mn/m10 (1 Low)27 (2 Low)
*2
01/05/2026
22:00:00
Honiton
Timeseries Graph
105 (4 Moderate)20 (1 Low)n/m10 (1 Low)20 (2 Low)
*2
01/05/2026
22:00:00
Plymouth Centre
Timeseries Graph
89 (3 Low)24 (1 Low)n/m21 (2 Low)119 (10 Very High)
*2
01/05/2026
12:00:00
Plymouth Tavistock Road
Timeseries Graph
n/m31 (1 Low)n/mn/mn/m 01/05/2026
08:00:00
Saltash Callington Road
Timeseries Graph
n/mn/mn/m8 (1 Low)30 (2 Low)
*1
01/05/2026
22:00:00
Swindon Walcot
Timeseries Graph
102 (4 Moderate)20 (1 Low)n/m9 (1 Low)22 (2 Low)
*2
01/05/2026
22:00:00
Yarner Wood
Timeseries Graph
109 (4 Moderate)14 (1 Low)n/m8 (1 Low)21 (2 Low)
*2
01/05/2026
22:00:00

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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
106 (4 Moderate)n/mn/mn/mn/m 01/05/2026
21:00:00

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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
95 (3 Low)71 (2 Low)n/m10 (1 Low)29 (2 Low)
*2
01/05/2026
22:00:00
Birmingham Hall Green
Timeseries Graph
111 (4 Moderate)40 (1 Low)n/m9 (1 Low)30 (2 Low)
*2
01/05/2026
20:00:00
Birmingham Ladywood
Timeseries Graph
76 (3 Low)62 (1 Low)6 (1 Low)9 (1 Low)25 (2 Low)
*2
01/05/2026
02:30:00
Birmingham University
Timeseries Graph
n/mn/mn/m9 (1 Low)25 (2 Low)
*2
01/05/2026
22:00:00
Burton-on-Trent Horninglow
Timeseries Graph
107 (4 Moderate)59 (1 Low)n/m11 (1 Low)27 (2 Low)
*2
01/05/2026
22:00:00
Cannock A5190 Roadside
Timeseries Graph
n/m42 (1 Low)n/m13 (2 Low)n/m 01/05/2026
22:00:00
Coventry Allesley
Timeseries Graph
99 (3 Low)15 (1 Low)n/m8 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00
Coventry Binley Road
Timeseries Graph
n/m44 (1 Low)n/m9 (1 Low)25 (2 Low)
*2
01/05/2026
22:00:00
Leamington Spa
Timeseries Graph
113 (4 Moderate)21 (1 Low)n/m8 (1 Low)23 (2 Low)
*2
01/05/2026
22:00:00
Leamington Spa Rugby Road
Timeseries Graph
n/m26 (1 Low)n/m8 (1 Low)20 (2 Low)
*2
01/05/2026
22:00:00
Leominster
Timeseries Graph
111 (4 Moderate)21 (1 Low)n/mn/mn/m 30/04/2026
23:00:00
Oldbury Birmingham Road
Timeseries Graph
n/m70 (2 Low)n/m11 (1 Low)29 (2 Low)
*2
01/05/2026
22:00:00
Shrewsbury Underdale
Timeseries Graph
n/mn/mn/m15 (2 Low)30 (2 Low)
*2
01/05/2026
22:00:00
Stoke-on-Trent A50 Roadside
Timeseries Graph
n/m72 (2 Low)n/m15 (2 Low)33 (2 Low)
*2
01/05/2026
22:00:00
Stoke-on-Trent Centre
Timeseries Graph
98 (3 Low)29 (1 Low)n/m14 (2 Low)33 (2 Low)
*2
01/05/2026
22:00:00
Telford Hollinswood
Timeseries Graph
113 (4 Moderate)34 (1 Low)n/m11 (1 Low)26 (2 Low)
*2
01/05/2026
22:00:00
Walsall Caldmore
Timeseries Graph
n/mn/mn/mn/an/a 01/05/2026
01:00:00
Walsall Woodlands
Timeseries Graph
109 (4 Moderate)37 (1 Low)n/mn/mn/m 30/04/2026
23:00:00
West Bromwich Kenrick Park
Timeseries Graph
100 (3 Low)57 (1 Low)n/mn/mn/m 30/04/2026
22:00:00
Worcester Tolladine
Timeseries Graph
n/mn/mn/m9 (1 Low)23 (2 Low)
*2
01/05/2026
22:00:00

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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)33 (1 Low)7 (1 Low)11 (1 Low)30 (2 Low)
*2
01/05/2026
09:00:00
Bradford Mayo Avenue
Timeseries Graph
n/m64 (1 Low)n/mn/mn/m 01/05/2026
09:00:00
Bradford Shipley Airedale Road
Timeseries Graph
n/mn/mn/m14 (2 Low)44 (3 Low)
*2
01/05/2026
22:00:00
Dewsbury Ashworth Grange
Timeseries Graph
91 (3 Low)41 (1 Low)n/m13 (2 Low)30 (2 Low)
*2
01/05/2026
22:00:00
Doncaster A630 Cleveland Street
Timeseries Graph
n/m56 (1 Low)n/m11 (1 Low)n/m 01/05/2026
22:00:00
Harrogate Woodlands
Timeseries Graph
n/mn/mn/m10 (1 Low)24 (2 Low)
*2
01/05/2026
22:00:00
High Muffles
Timeseries Graph
106 (4 Moderate)7 (1 Low)n/m8 (1 Low)23 (2 Low)
*2
01/05/2026
22:00:00
Hull Freetown
Timeseries Graph
94 (3 Low)41 (1 Low)3 (1 Low)11 (1 Low)29 (2 Low)
*2
01/05/2026
08:00:00
Hull Holderness Road
Timeseries Graph
n/m47 (1 Low)n/m9 (1 Low)22 (2 Low)
*2
01/05/2026
22:00:00
Immingham Woodlands Avenue
Timeseries Graph
98 (3 Low)37 (1 Low)n/m10 (1 Low)25 (2 Low)
*2
01/05/2026
22:00:00
Leeds Centre
Timeseries Graph
92 (3 Low)48 (1 Low)7 (1 Low)13 (2 Low)31 (2 Low)
*2
01/05/2026
09:45:00
Leeds Headingley Kerbside
Timeseries Graph
n/m56 (1 Low)n/m16 (2 Low)37 (3 Low)
*1
01/05/2026
22:00:00
Rotherham East Dene
Timeseries Graph
n/mn/mn/m13 (2 Low)29 (2 Low)
*2
01/05/2026
22:00:00
Scunthorpe Town
Timeseries Graph
n/m49 (1 Low)6 (1 Low)13 (2 Low)49 (3 Low)
*1
01/05/2026
20:45:00
Sheffield Barnsley Road
Timeseries Graph
n/m77 (2 Low)n/m16 (2 Low)n/m 01/05/2026
22:00:00
Sheffield Devonshire Green
Timeseries Graph
113 (4 Moderate)48 (1 Low)n/m12 (2 Low)29 (2 Low)
*2
01/05/2026
22:00:00
Sheffield Tinsley
Timeseries Graph
97 (3 Low)46 (1 Low)n/m12 (2 Low)29 (2 Low)
*2
01/05/2026
22:00:00
Wakefield Alverthorpe
Timeseries Graph
n/mn/mn/m12 (2 Low)30 (2 Low)
*2
01/05/2026
22:00:00
York Bootham
Timeseries Graph
100 (3 Low)20 (1 Low)n/m11 (1 Low)28 (2 Low)
*1
01/05/2026
22:00:00
York Fishergate
Timeseries Graph
n/m29 (1 Low)n/m8 (1 Low)34 (3 Low)
*1
01/05/2026
22:00:00

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