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 1pm Tue 2nd Sep 2025

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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
59 (2 Low)n/mn/m2 (1 Low)3 (1 Low)
*2
02/09/2025
01:00:00
Bush Estate
Timeseries Graph
64 (2 Low)4 (1 Low)n/mn/mn/m 01/09/2025
20:00:00
Dumbarton Roadside
Timeseries Graph
n/m6 (1 Low)n/mn/mn/m 01/09/2025
14:00:00
Edinburgh Nicolson Street
Timeseries Graph
n/m23 (1 Low)n/mn/mn/m 02/09/2025
09:00:00
Edinburgh St Leonards
Timeseries Graph
57 (2 Low)5 (1 Low)4 (1 Low)2 (1 Low)5 (1 Low)
*2
02/09/2025
07:45:00
Glasgow Great Western Road
Timeseries Graph
n/m22 (1 Low)n/mn/mn/m 02/09/2025
08:00:00
Glasgow High Street
Timeseries Graph
n/m11 (1 Low)n/m3 (1 Low)7 (1 Low)
*2
02/09/2025
13:00:00
Glasgow Kerbside
Timeseries Graph
n/m32 (1 Low)n/mn/mn/m 02/09/2025
08:00:00
Glasgow Townhead
Timeseries Graph
60 (2 Low)13 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
02/09/2025
13:00:00
Grangemouth
Timeseries Graph
n/m8 (1 Low)3 (1 Low)3 (1 Low)8 (1 Low)
*1
02/09/2025
09:15:00
Grangemouth Moray
Timeseries Graph
n/m6 (1 Low)n/mn/mn/m 01/09/2025
16:00:00
Greenock A8 Roadside
Timeseries Graph
n/m24 (1 Low)n/m3 (1 Low)7 (1 Low)
*2
02/09/2025
12:00:00

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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
60 (2 Low)11 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Chesterfield Roadside
Timeseries Graph
n/m20 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
09:00:00
Derby St Alkmund's Way
Timeseries Graph
n/m36 (1 Low)n/m4 (1 Low)n/m 02/09/2025
13:00:00
Derby Stockbrook Park
Timeseries Graph
50 (2 Low)n/mn/m4 (1 Low)7 (1 Low)
*2
02/09/2025
01:00:00
Ladybower
Timeseries Graph
66 (2 Low)6 (1 Low)2 (1 Low)4 (1 Low)7 (1 Low)
*2
02/09/2025
10:15:00
Leicester A594 Roadside
Timeseries Graph
n/m40 (1 Low)n/m5 (1 Low)11 (1 Low)
*2
02/09/2025
01:00:00
Leicester University
Timeseries Graph
58 (2 Low)24 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
02:00:00
Lincoln Canwick Road
Timeseries Graph
n/m20 (1 Low)n/mn/mn/m 01/09/2025
21:00:00
Loughborough Thorpe Acre
Timeseries Graph
n/mn/mn/m4 (1 Low)7 (1 Low)
*2
02/09/2025
03:00:00
Mansfield Ladybrook
Timeseries Graph
n/mn/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Northampton Spring Park
Timeseries Graph
66 (2 Low)n/an/m8 (1 Low)n/m 02/09/2025
01:00:00
Nottingham Bilborough
Timeseries Graph
n/mn/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
04:00:00
Nottingham Kenmore Gardens
Timeseries Graph
56 (2 Low)22 (1 Low)n/a4 (1 Low)10 (1 Low)
*2
27/08/2025
12:45:00
Nottingham Western Boulevard
Timeseries Graph
n/mn/an/mn/an/a 29/08/2025
10:00:00
Tallington
Timeseries Graph
65 (2 Low)n/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
02:00:00
Toft Newton
Timeseries Graph
60 (2 Low)8 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
02/09/2025
06:00:00

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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/m28 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
10:00:00
Cambridge Roadside
Timeseries Graph
n/m28 (1 Low)n/mn/mn/m 02/09/2025
13:00:00
Luton A505 Roadside
Timeseries Graph
n/m28 (1 Low)n/m4 (1 Low)n/m 02/09/2025
13:00:00
Norwich Lakenfields
Timeseries Graph
63 (2 Low)13 (1 Low)n/m4 (1 Low)7 (1 Low)
*2
02/09/2025
01:00:00
Peterborough Garton End
Timeseries Graph
n/mn/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Sibton
Timeseries Graph
59 (2 Low)n/mn/m5 (1 Low)11 (1 Low)
*2
01/09/2025
06:00:00
Southend Shoeburyness
Timeseries Graph
n/mn/mn/m5 (1 Low)10 (1 Low)
*2
02/09/2025
05:00:00
Southend-on-Sea
Timeseries Graph
64 (2 Low)9 (1 Low)n/m5 (1 Low)10 (1 Low)
*2
02/09/2025
06:00:00
St Osyth
Timeseries Graph
69 (3 Low)6 (1 Low)n/m5 (1 Low)9 (1 Low)
*2
02/09/2025
06:00:00
Stanford-le-Hope Roadside
Timeseries Graph
n/m22 (1 Low)n/m8 (1 Low)10 (1 Low)
*1
02/09/2025
07:00:00
Thurrock
Timeseries Graph
66 (2 Low)21 (1 Low)3 (1 Low)5 (1 Low)9 (1 Low)
*2
02/09/2025
06:30:00
Weybourne
Timeseries Graph
64 (2 Low)n/mn/m3 (1 Low)6 (1 Low)
*2
02/09/2025
01:00:00
Wicken Fen
Timeseries Graph
56 (2 Low)6 (1 Low)2 (1 Low)3 (1 Low)7 (1 Low)
*2
01/09/2025
13:15:00

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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/m42 (1 Low)n/m9 (1 Low)16 (1 Low)
*1
02/09/2025
12:00:00
Ealing Horn Lane
Timeseries Graph
n/mn/mn/mn/m21 (2 Low)
*1
02/09/2025
07:00:00
Haringey Roadside
Timeseries Graph
n/mn/an/mn/mn/m 15/07/2025
20:00:00
London Bexley
Timeseries Graph
n/m25 (1 Low)n/m5 (1 Low)9 (1 Low)
*2
02/09/2025
07:00:00
London Bloomsbury
Timeseries Graph
55 (2 Low)26 (1 Low)3 (1 Low)5 (1 Low)10 (1 Low)
*2
02/09/2025
04:45:00
London Haringey Priory Park South
Timeseries Graph
57 (2 Low)14 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
05:00:00
London Harlington
Timeseries Graph
46 (2 Low)51 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
05:00:00
London Hillingdon
Timeseries Graph
41 (2 Low)52 (1 Low)n/m6 (1 Low)18 (2 Low)
*2
02/09/2025
05:00:00
London Honor Oak Park
Timeseries Graph
65 (2 Low)n/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
04:00:00
London Marylebone Road
Timeseries Graph
35 (2 Low)84 (2 Low)6 (1 Low)7 (1 Low)19 (2 Low)
*1
02/09/2025
11:45:00
London N. Kensington
Timeseries Graph
65 (2 Low)24 (1 Low)5 (1 Low)4 (1 Low)8 (1 Low)
*2
01/09/2025
23:15:00
London Norbury Manor School
Timeseries Graph
n/mn/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
03:00:00
London Teddington Bushy Park
Timeseries Graph
n/mn/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
03:00:00
London Westminster
Timeseries Graph
48 (2 Low)20 (1 Low)n/mn/an/m 21/07/2025
16:00:00
Southwark A2 Old Kent Road
Timeseries Graph
n/m20 (1 Low)n/mn/m13 (1 Low)
*1
02/09/2025
08:00:00

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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
54 (2 Low)12 (1 Low)n/mn/mn/m 02/09/2025
09:00:00
Inverness
Timeseries Graph
n/m15 (1 Low)n/m2 (1 Low)4 (1 Low)
*2
02/09/2025
11:00:00
Lerwick
Timeseries Graph
76 (3 Low)n/mn/mn/mn/m 01/09/2025
17:00:00
Strathvaich
Timeseries Graph
68 (3 Low)n/mn/mn/mn/m 02/09/2025
13:00:00

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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
Hartlepool St Abbs Walk
Timeseries Graph
54 (2 Low)28 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
13:00:00
Kielder Water
Timeseries Graph
57 (2 Low)n/mn/m2 (1 Low)5 (1 Low)
*2
02/09/2025
01:00:00
Middlesbrough
Timeseries Graph
54 (2 Low)8 (1 Low)2 (1 Low)3 (1 Low)10 (1 Low)
*1
02/09/2025
10:15:00
Newcastle Centre
Timeseries Graph
56 (2 Low)21 (1 Low)n/m7 (1 Low)14 (1 Low)
*1
02/09/2025
06:00:00
Newcastle Cradlewell Roadside
Timeseries Graph
n/m56 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Stockton-on-Tees A1305 Roadside
Timeseries Graph
n/m12 (1 Low)n/m3 (1 Low)n/m 02/09/2025
12:00:00
Stockton-on-Tees Eaglescliffe
Timeseries Graph
n/m7 (1 Low)n/m6 (1 Low)11 (1 Low)
*1
02/09/2025
11:00:00
Sunderland Silksworth
Timeseries Graph
57 (2 Low)10 (1 Low)n/m3 (1 Low)7 (1 Low)
*2
02/09/2025
01:00:00
Sunderland Wessington Way
Timeseries Graph
n/m13 (1 Low)n/m4 (1 Low)n/m 02/09/2025
01:00:00

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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
57 (2 Low)4 (1 Low)n/m7 (1 Low)17 (2 Low)
*2
02/09/2025
01:00:00
Aberdeen Wellington Road
Timeseries Graph
n/m26 (1 Low)n/mn/mn/m 02/09/2025
09:00:00
Dundee Mains Loan
Timeseries Graph
n/m5 (1 Low)n/mn/mn/m 01/09/2025
21:00:00
Perth Glasgow Road
Timeseries Graph
n/m30 (1 Low)n/mn/mn/m 02/09/2025
08:00:00

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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
61 (2 Low)4 (1 Low)n/mn/mn/m 01/09/2025
20:00:00
Wrexham
Timeseries Graph
n/m23 (1 Low)1 (1 Low)3 (1 Low)7 (1 Low)
*2
02/09/2025
09:00:00

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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/m23 (1 Low)n/m4 (1 Low)n/m 02/09/2025
13:00:00
Blackburn Accrington Road
Timeseries Graph
n/m22 (1 Low)n/mn/mn/m 01/09/2025
20:00:00
Blackburn Audley Park
Timeseries Graph
50 (2 Low)n/mn/m5 (1 Low)8 (1 Low)
*2
02/09/2025
13:00:00
Blackpool Marton
Timeseries Graph
65 (2 Low)18 (1 Low)n/m5 (1 Low)12 (1 Low)
*2
02/09/2025
12:00:00
Blackpool Whitegate Drive
Timeseries Graph
n/mn/mn/m5 (1 Low)n/m 02/09/2025
11:00:00
Bury Whitefield Roadside
Timeseries Graph
n/m20 (1 Low)n/mn/m12 (1 Low)
*1
01/09/2025
19:00:00
Carlisle Morton A595
Timeseries Graph
n/m4 (1 Low)n/m4 (1 Low)8 (1 Low)
*1
02/09/2025
01:00:00
Crewe Coppenhall
Timeseries Graph
57 (2 Low)18 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
13:00:00
Glazebury
Timeseries Graph
58 (2 Low)10 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
13:00:00
Liverpool Speke
Timeseries Graph
57 (2 Low)13 (1 Low)59 (1 Low)7 (1 Low)13 (1 Low)
*1
02/09/2025
10:45:00
Liverpool Thirlmere Park
Timeseries Graph
53 (2 Low)n/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
13:00:00
Manchester Piccadilly
Timeseries Graph
45 (2 Low)23 (1 Low)n/a5 (1 Low)8 (1 Low)
*2
29/08/2025
13:45:00
Manchester Sharston
Timeseries Graph
48 (2 Low)14 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
11:00:00
Middlewich St Michael's Way
Timeseries Graph
n/mn/mn/m4 (1 Low)n/m 02/09/2025
13:00:00
Preston
Timeseries Graph
52 (2 Low)17 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
13:00:00
Salford Eccles
Timeseries Graph
58 (2 Low)15 (1 Low)n/m5 (1 Low)11 (1 Low)
*2
02/09/2025
11:00:00
Shaw Crompton Way
Timeseries Graph
n/m37 (1 Low)n/mn/mn/m 01/09/2025
17:00:00
St Helens Linkway
Timeseries Graph
n/m34 (1 Low)n/mn/m9 (1 Low)
*1
02/09/2025
08:00:00
Tameside A635 Manchester Road
Timeseries Graph
n/mn/mn/m7 (1 Low)n/m 02/09/2025
11:00:00
Warrington
Timeseries Graph
n/m19 (1 Low)n/m1 (1 Low)n/a 02/09/2025
02:00:00
Widnes Milton Road
Timeseries Graph
n/m29 (1 Low)n/mn/mn/m 01/09/2025
13:00:00
Wigan Centre
Timeseries Graph
54 (2 Low)19 (1 Low)n/m5 (1 Low)9 (1 Low)
*2
02/09/2025
13:00:00
Wirral Tranmere
Timeseries Graph
51 (2 Low)16 (1 Low)n/m3 (1 Low)7 (1 Low)
*2
02/09/2025
13:00:00

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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/m50 (1 Low)n/mn/m15 (1 Low)
*1
02/09/2025
08:00:00
Ballymena Antrim Road
Timeseries Graph
n/m26 (1 Low)n/mn/mn/m 02/09/2025
08:00:00
Ballymena Ballykeel
Timeseries Graph
n/m10 (1 Low)2 (1 Low)n/mn/m 01/09/2025
24:30:
Belfast Centre
Timeseries Graph
40 (2 Low)21 (1 Low)23 (1 Low)4 (1 Low)8 (1 Low)
*2
02/09/2025
11:15:00
Belfast Stockman's Lane
Timeseries Graph
n/m68 (2 Low)n/mn/m11 (1 Low)
*1
02/09/2025
08:00:00
Derry Rosemount
Timeseries Graph
54 (2 Low)7 (1 Low)1 (1 Low)2 (1 Low)8 (1 Low)
*1
01/09/2025
19:15:00
Lough Navar
Timeseries Graph
49 (2 Low)n/mn/m3 (1 Low)6 (1 Low)
*2
02/09/2025
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/m44 (1 Low)n/mn/mn/m 02/09/2025
08:00:00
Eskdalemuir
Timeseries Graph
59 (2 Low)2 (1 Low)n/mn/mn/m 01/09/2025
18:00:00
Peebles
Timeseries Graph
n/a1 (1 Low)n/mn/mn/m 01/09/2025
13:00:00

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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
Brighton Preston Park
Timeseries Graph
67 (3 Low)6 (1 Low)n/m6 (1 Low)13 (1 Low)
*2
02/09/2025
04:00:00
Chatham Roadside
Timeseries Graph
n/m19 (1 Low)n/m4 (1 Low)17 (2 Low)
*1
02/09/2025
02:00:00
Chilbolton Observatory
Timeseries Graph
66 (2 Low)6 (1 Low)2 (1 Low)4 (1 Low)7 (1 Low)
*2
02/09/2025
03:45:00
Eastbourne
Timeseries Graph
68 (3 Low)3 (1 Low)n/m5 (1 Low)12 (1 Low)
*2
02/09/2025
03:00:00
Farnborough Cherrywood
Timeseries Graph
n/mn/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Horley
Timeseries Graph
n/m53 (1 Low)n/m5 (1 Low)11 (1 Low)
*2
02/09/2025
01:00:00
Lullington Heath
Timeseries Graph
75 (3 Low)3 (1 Low)3 (1 Low)6 (1 Low)12 (1 Low)
*2
02/09/2025
02:15:00
Maidstone Upper Stone Street
Timeseries Graph
n/mn/mn/m5 (1 Low)11 (1 Low)
*2
02/09/2025
03:00:00
Milton Keynes Civic Centre
Timeseries Graph
64 (2 Low)n/mn/m4 (1 Low)9 (1 Low)
*2
02/09/2025
01:00:00
Oxford Centre Roadside
Timeseries Graph
n/mn/an/mn/mn/m 19/08/2025
17:00:00
Oxford St Ebbes
Timeseries Graph
55 (2 Low)20 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Portsmouth
Timeseries Graph
59 (2 Low)15 (1 Low)n/m5 (1 Low)11 (1 Low)
*2
02/09/2025
01:00:00
Portsmouth Anglesea Road
Timeseries Graph
n/m20 (1 Low)n/m6 (1 Low)12 (1 Low)
*2
02/09/2025
01:00:00
Reading London Road
Timeseries Graph
n/m29 (1 Low)n/mn/m13 (1 Low)
*1
02/09/2025
07:00:00
Reading New Town
Timeseries Graph
51 (2 Low)12 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Reading Rose Kiln Lane
Timeseries Graph
n/mn/mn/m4 (1 Low)n/m 02/09/2025
01:00:00
Rochester Stoke
Timeseries Graph
66 (2 Low)11 (1 Low)1 (1 Low)5 (1 Low)11 (1 Low)
*2
01/09/2025
16:15:00
Slough Windmill Bath Road
Timeseries Graph
n/mn/mn/m5 (1 Low)10 (1 Low)
*2
02/09/2025
01:00:00
Southampton A33
Timeseries Graph
n/m68 (2 Low)n/m6 (1 Low)12 (1 Low)
*2
02/09/2025
01:00:00
Southampton Centre
Timeseries Graph
50 (2 Low)47 (1 Low)5 (1 Low)6 (1 Low)14 (1 Low)
*2
02/09/2025
09:00:00
Storrington Roadside
Timeseries Graph
n/mn/an/m5 (1 Low)11 (1 Low)
*2
02/09/2025
13:00:00
Worthing A27 Roadside
Timeseries Graph
n/m29 (1 Low)n/m8 (1 Low)n/m 02/09/2025
03:00:00
Worthing East Ten Acres
Timeseries Graph
n/mn/mn/m7 (1 Low)17 (2 Low)
*2
02/09/2025
03:00:00

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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
58 (2 Low)20 (1 Low)2 (1 Low)7 (1 Low)14 (1 Low)
*1
02/09/2025
08:30:00
Cardiff Newport Road
Timeseries Graph
n/m30 (1 Low)n/mn/m14 (1 Low)
*1
02/09/2025
12:00:00
Chepstow A48
Timeseries Graph
n/m41 (1 Low)n/m7 (1 Low)14 (1 Low)
*1
02/09/2025
01:00:00
Cwmbran Crownbridge
Timeseries Graph
66 (2 Low)20 (1 Low)n/mn/mn/m 01/09/2025
19:00:00
Hafod-yr-ynys Hill Roadside
Timeseries Graph
n/m37 (1 Low)n/mn/mn/m 02/09/2025
10:00:00
Narberth
Timeseries Graph
60 (2 Low)7 (1 Low)1 (1 Low)5 (1 Low)10 (1 Low)
*2
02/09/2025
10:15:00
Newport
Timeseries Graph
n/m31 (1 Low)n/m5 (1 Low)12 (1 Low)
*2
02/09/2025
01:00:00
Port Talbot Margam
Timeseries Graph
63 (2 Low)11 (1 Low)1 (1 Low)4 (1 Low)18 (2 Low)
*3
02/09/2025
02:45:00
Swansea Roadside
Timeseries Graph
n/m27 (1 Low)n/m7 (1 Low)13 (1 Low)
*1
02/09/2025
12:00:00

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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/m5 (1 Low)12 (1 Low)
*2
02/09/2025
01:00:00
Bath A4 Roadside
Timeseries Graph
n/m29 (1 Low)n/mn/mn/m 02/09/2025
10:00:00
Bournemouth
Timeseries Graph
68 (3 Low)6 (1 Low)n/m6 (1 Low)n/m 02/09/2025
02:00:00
Bristol St Paul's
Timeseries Graph
61 (2 Low)32 (1 Low)n/m6 (1 Low)15 (1 Low)
*1
02/09/2025
07:00:00
Bristol Temple Way
Timeseries Graph
n/m40 (1 Low)n/m6 (1 Low)13 (1 Low)
*2
02/09/2025
01:00:00
Charlton Mackrell
Timeseries Graph
60 (2 Low)7 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
01:00:00
Cheltenham A40 Gloucester Road
Timeseries Graph
n/mn/mn/m2 (1 Low)n/m 02/09/2025
12:00:00
Christchurch Barrack Road
Timeseries Graph
n/m5 (1 Low)n/m8 (1 Low)n/m 02/09/2025
01:00:00
Exeter Roadside
Timeseries Graph
54 (2 Low)35 (1 Low)n/mn/mn/m 01/09/2025
17:00:00
Gloucester Tredworth
Timeseries Graph
n/mn/mn/m5 (1 Low)10 (1 Low)
*2
02/09/2025
01:00:00
Honiton
Timeseries Graph
55 (2 Low)4 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
01:00:00
London Farringdon Street
Timeseries Graph
n/m33 (1 Low)n/m6 (1 Low)n/m 02/09/2025
12:00:00
Plymouth Centre
Timeseries Graph
59 (2 Low)15 (1 Low)n/m7 (1 Low)16 (1 Low)
*2
02/09/2025
01:00:00
Plymouth Tavistock Road
Timeseries Graph
n/m14 (1 Low)n/mn/mn/m 01/09/2025
17:00:00
Saltash Callington Road
Timeseries Graph
n/mn/mn/m3 (1 Low)16 (1 Low)
*1
02/09/2025
01:00:00
Swindon Walcot
Timeseries Graph
58 (2 Low)3 (1 Low)n/m5 (1 Low)10 (1 Low)
*2
02/09/2025
01:00:00
Yarner Wood
Timeseries Graph
54 (2 Low)8 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00

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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
78 (3 Low)n/mn/mn/mn/m 01/09/2025
19:00:00

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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
50 (2 Low)44 (1 Low)n/m5 (1 Low)12 (1 Low)
*2
02/09/2025
02:00:00
Birmingham Hall Green
Timeseries Graph
40 (2 Low)13 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Birmingham Ladywood
Timeseries Graph
58 (2 Low)15 (1 Low)1 (1 Low)4 (1 Low)8 (1 Low)
*2
01/09/2025
16:15:00
Birmingham University
Timeseries Graph
n/mn/mn/m4 (1 Low)7 (1 Low)
*2
02/09/2025
01:00:00
Burton-on-Trent Horninglow
Timeseries Graph
n/an/an/m5 (1 Low)9 (1 Low)
*2
02/09/2025
04:00:00
Cannock A5190 Roadside
Timeseries Graph
n/m19 (1 Low)n/m4 (1 Low)n/m 02/09/2025
10:00:00
Coventry Allesley
Timeseries Graph
56 (2 Low)26 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Coventry Binley Road
Timeseries Graph
n/m32 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
02:00:00
Leamington Spa
Timeseries Graph
66 (2 Low)12 (1 Low)n/m5 (1 Low)11 (1 Low)
*2
02/09/2025
01:00:00
Leamington Spa Rugby Road
Timeseries Graph
n/m18 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Leominster
Timeseries Graph
58 (2 Low)14 (1 Low)n/mn/mn/m 01/09/2025
19:00:00
Oldbury Birmingham Road
Timeseries Graph
n/m31 (1 Low)n/m5 (1 Low)10 (1 Low)
*2
02/09/2025
13:00:00
Shrewsbury Underdale
Timeseries Graph
n/mn/mn/m4 (1 Low)8 (1 Low)
*2
02/09/2025
13:00:00
Stoke-on-Trent A50 Roadside
Timeseries Graph
n/m52 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
12:00:00
Stoke-on-Trent Centre
Timeseries Graph
54 (2 Low)22 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
13:00:00
Telford Hollinswood
Timeseries Graph
66 (2 Low)16 (1 Low)n/m4 (1 Low)7 (1 Low)
*2
02/09/2025
13:00:00
Walsall Woodlands
Timeseries Graph
62 (2 Low)17 (1 Low)n/mn/mn/m 01/09/2025
19:00:00
West Bromwich Kenrick Park
Timeseries Graph
56 (2 Low)20 (1 Low)n/mn/mn/m 01/09/2025
20:00:00
Worcester Tolladine
Timeseries Graph
n/mn/mn/m4 (1 Low)9 (1 Low)
*2
02/09/2025
01:00:00

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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
56 (2 Low)18 (1 Low)3 (1 Low)4 (1 Low)8 (1 Low)
*2
02/09/2025
09:15:00
Bradford Mayo Avenue
Timeseries Graph
n/m30 (1 Low)n/mn/mn/m 01/09/2025
22:00:00
Bradford Shipley Airedale Road
Timeseries Graph
n/mn/mn/m5 (1 Low)12 (1 Low)
*2
02/09/2025
12:00:00
Dewsbury Ashworth Grange
Timeseries Graph
56 (2 Low)33 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
02/09/2025
01:00:00
Doncaster A630 Cleveland Street
Timeseries Graph
n/m43 (1 Low)n/m5 (1 Low)n/m 02/09/2025
10:00:00
Harrogate Woodlands
Timeseries Graph
n/mn/mn/m4 (1 Low)7 (1 Low)
*2
02/09/2025
09:00:00
High Muffles
Timeseries Graph
53 (2 Low)9 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
02/09/2025
12:00:00
Hull Freetown
Timeseries Graph
52 (2 Low)30 (1 Low)2 (1 Low)5 (1 Low)12 (1 Low)
*2
02/09/2025
10:00:00
Hull Holderness Road
Timeseries Graph
n/m39 (1 Low)n/m5 (1 Low)11 (1 Low)
*2
02/09/2025
11:00:00
Immingham Woodlands Avenue
Timeseries Graph
61 (2 Low)11 (1 Low)n/m3 (1 Low)7 (1 Low)
*2
02/09/2025
01:00:00
Leeds Centre
Timeseries Graph
45 (2 Low)38 (1 Low)2 (1 Low)5 (1 Low)10 (1 Low)
*2
02/09/2025
07:45:00
Leeds Headingley Kerbside
Timeseries Graph
n/m13 (1 Low)n/m9 (1 Low)15 (1 Low)
*1
02/09/2025
08:00:00
Rotherham East Dene
Timeseries Graph
n/mn/mn/m5 (1 Low)9 (1 Low)
*2
02/09/2025
01:00:00
Scunthorpe Town
Timeseries Graph
n/m18 (1 Low)1 (1 Low)5 (1 Low)11 (1 Low)
*1
01/09/2025
19:15:00
Sheffield Barnsley Road
Timeseries Graph
n/m44 (1 Low)n/m6 (1 Low)n/m 02/09/2025
12:00:00
Sheffield Devonshire Green
Timeseries Graph
49 (2 Low)17 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
02/09/2025
01:00:00
Sheffield Tinsley
Timeseries Graph
42 (2 Low)31 (1 Low)n/m4 (1 Low)11 (1 Low)
*2
02/09/2025
13:00:00
Wakefield Alverthorpe
Timeseries Graph
n/mn/mn/m5 (1 Low)9 (1 Low)
*2
02/09/2025
01:00:00
York Bootham
Timeseries Graph
46 (2 Low)28 (1 Low)n/m5 (1 Low)11 (1 Low)
*1
02/09/2025
10:00:00
York Fishergate
Timeseries Graph
n/m23 (1 Low)n/m4 (1 Low)13 (1 Low)
*1
02/09/2025
13:00:00

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