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 4pm Fri 28th Mar 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
82 (3 Low)n/mn/m2 (1 Low)3 (1 Low)
*2
28/03/2025
04:00
Bush Estate
Timeseries Graph
92 (3 Low)3 (1 Low)n/mn/mn/m 28/03/2025
04:00
Dumbarton Roadside
Timeseries Graph
n/m15 (1 Low)n/mn/mn/m 28/03/2025
15:00
Edinburgh Nicolson Street
Timeseries Graph
n/m26 (1 Low)n/mn/mn/m 28/03/2025
14:00
Edinburgh St Leonards
Timeseries Graph
68 (3 Low)11 (1 Low)n/a3 (1 Low)6 (1 Low)
*2
15/03/2025
21:00
Glasgow Great Western Road
Timeseries Graph
n/m13 (1 Low)n/mn/mn/m 27/03/2025
20:00
Glasgow High Street
Timeseries Graph
n/m19 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
28/03/2025
03:00
Glasgow Kerbside
Timeseries Graph
n/m31 (1 Low)n/mn/mn/m 28/03/2025
08:00
Glasgow Townhead
Timeseries Graph
87 (3 Low)18 (1 Low)n/m4 (1 Low)7 (1 Low)
*2
28/03/2025
02:00
Grangemouth
Timeseries Graph
n/m7 (1 Low)3 (1 Low)4 (1 Low)4 (1 Low)
*1
27/03/2025
17:15
Grangemouth Moray
Timeseries Graph
n/m6 (1 Low)n/mn/mn/m 28/03/2025
09:00
Greenock A8 Roadside
Timeseries Graph
n/m24 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
27/03/2025
24:00

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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
87 (3 Low)5 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
27/03/2025
24:00
Chesterfield Roadside
Timeseries Graph
n/m14 (1 Low)n/m3 (1 Low)8 (1 Low)
*2
27/03/2025
24:00
Derby St Alkmund's Way
Timeseries Graph
n/m45 (1 Low)n/m5 (1 Low)n/m 27/03/2025
24:00
Derby Stockbrook Park
Timeseries Graph
77 (3 Low)n/mn/m3 (1 Low)6 (1 Low)
*2
27/03/2025
24:00
Ladybower
Timeseries Graph
91 (3 Low)4 (1 Low)1 (1 Low)3 (1 Low)5 (1 Low)
*2
28/03/2025
10:30
Leicester A594 Roadside
Timeseries Graph
n/m32 (1 Low)n/m6 (1 Low)13 (1 Low)
*2
27/03/2025
24:00
Leicester University
Timeseries Graph
76 (3 Low)17 (1 Low)n/m5 (1 Low)8 (1 Low)
*2
27/03/2025
24:00
Lincoln Canwick Road
Timeseries Graph
n/m24 (1 Low)n/mn/mn/m 27/03/2025
17:00
Mansfield Ladybrook
Timeseries Graph
n/mn/mn/m5 (1 Low)8 (1 Low)
*2
27/03/2025
24:00
Northampton Spring Park
Timeseries Graph
84 (3 Low)12 (1 Low)n/m15 (2 Low)n/m 27/03/2025
07:00
Nottingham Bilborough
Timeseries Graph
n/mn/mn/m5 (1 Low)9 (1 Low)
*2
27/03/2025
24:00
Nottingham Kenmore Gardens
Timeseries Graph
83 (3 Low)18 (1 Low)1 (1 Low)13 (2 Low)20 (2 Low)
*2
28/03/2025
05:30
Nottingham Western Boulevard
Timeseries Graph
n/m33 (1 Low)n/m6 (1 Low)14 (1 Low)
*2
27/03/2025
24:00
Tallington
Timeseries Graph
86 (3 Low)n/mn/m7 (1 Low)9 (1 Low)
*2
27/03/2025
24:00
Toft Newton
Timeseries Graph
98 (3 Low)12 (1 Low)n/m9 (1 Low)13 (1 Low)
*2
27/03/2025
24:00

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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/m11 (1 Low)n/m10 (1 Low)13 (1 Low)
*2
27/03/2025
24:00
Cambridge Roadside
Timeseries Graph
n/m33 (1 Low)n/mn/mn/m 28/03/2025
15:00
Luton A505 Roadside
Timeseries Graph
n/m27 (1 Low)n/m11 (1 Low)n/m 27/03/2025
24:00
Norwich Lakenfields
Timeseries Graph
71 (3 Low)15 (1 Low)n/m12 (2 Low)16 (1 Low)
*2
28/03/2025
06:00
Peterborough Garton End
Timeseries Graph
n/mn/mn/m9 (1 Low)13 (1 Low)
*2
27/03/2025
24:00
Sibton
Timeseries Graph
77 (3 Low)n/mn/m13 (2 Low)20 (2 Low)
*2
28/03/2025
06:00
Southend-on-Sea
Timeseries Graph
70 (3 Low)30 (1 Low)n/m12 (2 Low)17 (2 Low)
*2
28/03/2025
05:00
St Osyth
Timeseries Graph
83 (3 Low)22 (1 Low)n/m15 (2 Low)20 (2 Low)
*2
28/03/2025
06:00
Stanford-le-Hope Roadside
Timeseries Graph
n/m41 (1 Low)n/m15 (2 Low)23 (2 Low)
*1
28/03/2025
02:00
Thurrock
Timeseries Graph
72 (3 Low)47 (1 Low)5 (1 Low)12 (2 Low)18 (2 Low)
*2
27/03/2025
23:15
Weybourne
Timeseries Graph
68 (3 Low)n/mn/m11 (1 Low)14 (1 Low)
*2
28/03/2025
02:00
Wicken Fen
Timeseries Graph
70 (3 Low)9 (1 Low)3 (1 Low)13 (2 Low)17 (2 Low)
*2
27/03/2025
23:45

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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/m74 (2 Low)n/m12 (2 Low)20 (2 Low)
*1
27/03/2025
24:00
Ealing Horn Lane
Timeseries Graph
n/mn/mn/mn/m49 (3 Low)
*1
27/03/2025
24:00
Haringey Roadside
Timeseries Graph
n/m32 (1 Low)n/mn/mn/m 27/03/2025
18:00
London Bexley
Timeseries Graph
n/m31 (1 Low)n/m13 (2 Low)18 (2 Low)
*2
28/03/2025
04:00
London Bloomsbury
Timeseries Graph
63 (2 Low)31 (1 Low)2 (1 Low)11 (1 Low)16 (1 Low)
*2
28/03/2025
09:45
London Haringey Priory Park South
Timeseries Graph
78 (3 Low)20 (1 Low)n/m10 (1 Low)15 (1 Low)
*2
27/03/2025
24:00
London Harlington
Timeseries Graph
76 (3 Low)26 (1 Low)n/m11 (1 Low)15 (1 Low)
*2
27/03/2025
24:00
London Hillingdon
Timeseries Graph
71 (3 Low)37 (1 Low)n/m11 (1 Low)19 (2 Low)
*2
27/03/2025
24:00
London Honor Oak Park
Timeseries Graph
81 (3 Low)n/mn/m10 (1 Low)14 (1 Low)
*2
28/03/2025
02:00
London Marylebone Road
Timeseries Graph
52 (2 Low)42 (1 Low)3 (1 Low)13 (2 Low)25 (2 Low)
*1
27/03/2025
17:00
London N. Kensington
Timeseries Graph
77 (3 Low)18 (1 Low)1 (1 Low)10 (1 Low)15 (1 Low)
*2
28/03/2025
09:45
London Teddington Bushy Park
Timeseries Graph
n/mn/mn/m9 (1 Low)14 (1 Low)
*2
28/03/2025
03:00
London Westminster
Timeseries Graph
65 (2 Low)28 (1 Low)n/m9 (1 Low)n/m 27/03/2025
24:00
Southwark A2 Old Kent Road
Timeseries Graph
n/m27 (1 Low)n/mn/m18 (2 Low)
*1
28/03/2025
12:00

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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
90 (3 Low)14 (1 Low)n/mn/mn/m 28/03/2025
01:00
Inverness
Timeseries Graph
n/m15 (1 Low)n/m2 (1 Low)3 (1 Low)
*2
28/03/2025
16:00
Lerwick
Timeseries Graph
93 (3 Low)n/mn/mn/mn/m 28/03/2025
03:00
Strathvaich
Timeseries Graph
101 (4 Moderate)n/mn/mn/mn/m 27/03/2025
23:00

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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
82 (3 Low)8 (1 Low)n/m3 (1 Low)7 (1 Low)
*2
27/03/2025
24:00
Kielder Water
Timeseries Graph
78 (3 Low)n/mn/m2 (1 Low)4 (1 Low)
*2
28/03/2025
16:00
Middlesbrough
Timeseries Graph
80 (3 Low)9 (1 Low)1 (1 Low)2 (1 Low)9 (1 Low)
*1
28/03/2025
03:45
Newcastle Centre
Timeseries Graph
78 (3 Low)20 (1 Low)n/m6 (1 Low)11 (1 Low)
*1
27/03/2025
24:00
Newcastle Cradlewell Roadside
Timeseries Graph
n/m29 (1 Low)n/m3 (1 Low)9 (1 Low)
*2
27/03/2025
24:00
Stockton-on-Tees A1305 Roadside
Timeseries Graph
n/m8 (1 Low)n/m2 (1 Low)n/m 28/03/2025
10:00
Stockton-on-Tees Eaglescliffe
Timeseries Graph
n/m3 (1 Low)n/m2 (1 Low)8 (1 Low)
*1
28/03/2025
16:00
Sunderland Silksworth
Timeseries Graph
81 (3 Low)9 (1 Low)n/m2 (1 Low)5 (1 Low)
*2
28/03/2025
16:00
Sunderland Wessington Way
Timeseries Graph
n/m17 (1 Low)n/m3 (1 Low)n/m 28/03/2025
16:00

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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)37 (1 Low)n/m2 (1 Low)5 (1 Low)
*2
27/03/2025
24:00
Aberdeen Wellington Road
Timeseries Graph
n/m36 (1 Low)n/mn/mn/m 28/03/2025
08:00
Dundee Mains Loan
Timeseries Graph
n/m8 (1 Low)n/mn/mn/m 27/03/2025
17:00
Perth Glasgow Road
Timeseries Graph
n/m20 (1 Low)n/mn/mn/m 28/03/2025
09:00

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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
84 (3 Low)3 (1 Low)n/mn/mn/m 28/03/2025
16:00
Wrexham
Timeseries Graph
n/m9 (1 Low)5 (1 Low)3 (1 Low)6 (1 Low)
*2
27/03/2025
20:00

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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/m10 (1 Low)n/m4 (1 Low)n/m 28/03/2025
16:00
Blackburn Accrington Road
Timeseries Graph
n/m23 (1 Low)n/mn/mn/m 27/03/2025
19:00
Blackburn Audley Park
Timeseries Graph
80 (3 Low)n/mn/m4 (1 Low)8 (1 Low)
*2
28/03/2025
16:00
Blackpool Marton
Timeseries Graph
84 (3 Low)14 (1 Low)n/m6 (1 Low)14 (1 Low)
*2
28/03/2025
16:00
Blackpool Whitegate Drive
Timeseries Graph
n/mn/mn/m8 (1 Low)n/m 28/03/2025
16:00
Bury Whitefield Roadside
Timeseries Graph
n/m16 (1 Low)n/mn/m12 (1 Low)
*1
27/03/2025
18:00
Carlisle Morton A595
Timeseries Graph
n/m11 (1 Low)n/m3 (1 Low)6 (1 Low)
*1
28/03/2025
07:00
Crewe Coppenhall
Timeseries Graph
87 (3 Low)8 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
28/03/2025
16:00
Glazebury
Timeseries Graph
88 (3 Low)7 (1 Low)n/m7 (1 Low)10 (1 Low)
*2
27/03/2025
24:00
Liverpool Speke
Timeseries Graph
78 (3 Low)8 (1 Low)1 (1 Low)3 (1 Low)11 (1 Low)
*1
27/03/2025
17:45
Liverpool Thirlmere Park
Timeseries Graph
85 (3 Low)n/mn/m4 (1 Low)9 (1 Low)
*2
28/03/2025
16:00
Manchester Piccadilly
Timeseries Graph
78 (3 Low)22 (1 Low)3 (1 Low)5 (1 Low)13 (1 Low)
*2
27/03/2025
16:15
Manchester Sharston
Timeseries Graph
77 (3 Low)34 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
28/03/2025
16:00
Middlewich St Michael's Way
Timeseries Graph
n/mn/mn/m3 (1 Low)n/m 28/03/2025
16:00
Preston
Timeseries Graph
81 (3 Low)10 (1 Low)n/m4 (1 Low)10 (1 Low)
*2
28/03/2025
16:00
Salford Eccles
Timeseries Graph
85 (3 Low)15 (1 Low)n/m6 (1 Low)12 (1 Low)
*2
27/03/2025
24:00
Shaw Crompton Way
Timeseries Graph
n/m19 (1 Low)n/mn/mn/m 27/03/2025
18:00
St Helens Linkway
Timeseries Graph
n/m27 (1 Low)n/mn/m14 (1 Low)
*1
27/03/2025
20:00
Warrington
Timeseries Graph
n/m18 (1 Low)n/m4 (1 Low)11 (1 Low)
*1
27/03/2025
24:00
Widnes Milton Road
Timeseries Graph
n/m38 (1 Low)n/mn/mn/m 27/03/2025
17:00
Wigan Centre
Timeseries Graph
85 (3 Low)16 (1 Low)n/m5 (1 Low)11 (1 Low)
*2
27/03/2025
24:00
Wirral Tranmere
Timeseries Graph
85 (3 Low)7 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
28/03/2025
16:00

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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/m34 (1 Low)n/mn/m13 (1 Low)
*1
28/03/2025
09:00
Ballymena Antrim Road
Timeseries Graph
n/m16 (1 Low)n/mn/mn/m 28/03/2025
14:00
Ballymena Ballykeel
Timeseries Graph
n/mn/an/an/mn/m 26/02/2025
09:15
Belfast Centre
Timeseries Graph
54 (2 Low)27 (1 Low)1 (1 Low)4 (1 Low)9 (1 Low)
*2
28/03/2025
01:30
Belfast Stockman's Lane
Timeseries Graph
n/m47 (1 Low)n/mn/m14 (1 Low)
*1
28/03/2025
08:00
Derry Rosemount
Timeseries Graph
84 (3 Low)7 (1 Low)2 (1 Low)3 (1 Low)11 (1 Low)
*1
27/03/2025
22:45
Lough Navar
Timeseries Graph
76 (3 Low)n/mn/m4 (1 Low)7 (1 Low)
*2
28/03/2025
16:00

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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/m49 (1 Low)n/mn/mn/m 28/03/2025
13:00
Eskdalemuir
Timeseries Graph
83 (3 Low)2 (1 Low)n/mn/mn/m 28/03/2025
16:00
Peebles
Timeseries Graph
89 (3 Low)3 (1 Low)n/mn/mn/m 28/03/2025
05:00

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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
64 (2 Low)13 (1 Low)n/m11 (1 Low)14 (1 Low)
*2
28/03/2025
01:00
Chatham Roadside
Timeseries Graph
n/m30 (1 Low)n/m15 (2 Low)28 (2 Low)
*1
28/03/2025
05:00
Chilbolton Observatory
Timeseries Graph
61 (2 Low)6 (1 Low)2 (1 Low)8 (1 Low)9 (1 Low)
*2
27/03/2025
21:30
Eastbourne
Timeseries Graph
78 (3 Low)13 (1 Low)n/m9 (1 Low)11 (1 Low)
*2
28/03/2025
02:00
Horley
Timeseries Graph
n/m26 (1 Low)n/m12 (2 Low)n/a 28/03/2025
02:00
Lullington Heath
Timeseries Graph
83 (3 Low)15 (1 Low)2 (1 Low)10 (1 Low)12 (1 Low)
*2
28/03/2025
07:45
Maidstone Upper Stone Street
Timeseries Graph
n/mn/mn/m17 (2 Low)24 (2 Low)
*2
28/03/2025
02:00
Milton Keynes Civic Centre
Timeseries Graph
85 (3 Low)n/mn/mn/an/a 31/01/2025
24:00
Oxford Centre Roadside
Timeseries Graph
n/m19 (1 Low)n/mn/mn/m 27/03/2025
19:00
Oxford St Ebbes
Timeseries Graph
83 (3 Low)8 (1 Low)n/m7 (1 Low)9 (1 Low)
*2
27/03/2025
24:00
Portsmouth
Timeseries Graph
77 (3 Low)33 (1 Low)n/m12 (2 Low)15 (1 Low)
*2
27/03/2025
24:00
Portsmouth Anglesea Road
Timeseries Graph
n/m51 (1 Low)n/m12 (2 Low)18 (2 Low)
*2
27/03/2025
24:00
Reading London Road
Timeseries Graph
n/mn/an/mn/m14 (1 Low)
*1
11/03/2025
19:00
Reading New Town
Timeseries Graph
74 (3 Low)9 (1 Low)n/m11 (1 Low)14 (1 Low)
*2
27/03/2025
24:00
Reading Rose Kiln Lane
Timeseries Graph
n/mn/mn/m9 (1 Low)n/m 27/03/2025
24:00
Rochester Stoke
Timeseries Graph
80 (3 Low)15 (1 Low)3 (1 Low)15 (2 Low)20 (2 Low)
*2
28/03/2025
12:15
Slough Windmill Bath Road
Timeseries Graph
n/mn/mn/m12 (2 Low)20 (2 Low)
*2
27/03/2025
24:00
Southampton A33
Timeseries Graph
n/m48 (1 Low)n/m11 (1 Low)17 (2 Low)
*2
27/03/2025
24:00
Southampton Centre
Timeseries Graph
75 (3 Low)31 (1 Low)10 (1 Low)12 (2 Low)15 (1 Low)
*2
28/03/2025
12:00
Storrington Roadside
Timeseries Graph
n/m29 (1 Low)n/m13 (2 Low)18 (2 Low)
*2
28/03/2025
02:00
Worthing A27 Roadside
Timeseries Graph
n/m33 (1 Low)n/m13 (2 Low)n/m 27/03/2025
24:00
Worthing East Ten Acres
Timeseries Graph
n/mn/mn/m14 (2 Low)17 (2 Low)
*2
27/03/2025
24:00

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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
n/an/an/an/an/a 25/02/2025
09:30
Cardiff Newport Road
Timeseries Graph
n/m16 (1 Low)n/mn/m11 (1 Low)
*1
27/03/2025
18:00
Chepstow A48
Timeseries Graph
n/m42 (1 Low)n/m5 (1 Low)16 (1 Low)
*1
27/03/2025
24:00
Cwmbran Crownbridge
Timeseries Graph
86 (3 Low)6 (1 Low)n/mn/mn/m 28/03/2025
16:00
Hafod-yr-ynys Hill Roadside
Timeseries Graph
n/m45 (1 Low)n/mn/mn/m 28/03/2025
07:00
Narberth
Timeseries Graph
81 (3 Low)2 (1 Low)3 (1 Low)4 (1 Low)9 (1 Low)
*2
28/03/2025
09:15
Newport
Timeseries Graph
n/m17 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
28/03/2025
16:00
Port Talbot Margam
Timeseries Graph
80 (3 Low)29 (1 Low)3 (1 Low)3 (1 Low)13 (1 Low)
*3
27/03/2025
18:15
Swansea Roadside
Timeseries Graph
n/m23 (1 Low)n/m5 (1 Low)13 (1 Low)
*1
28/03/2025
16:00

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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
28/03/2025
16:00
Bath A4 Roadside
Timeseries Graph
n/m38 (1 Low)n/mn/mn/m 27/03/2025
19:00
Bournemouth
Timeseries Graph
81 (3 Low)10 (1 Low)n/m14 (2 Low)n/m 27/03/2025
24:00
Bristol St Paul's
Timeseries Graph
78 (3 Low)19 (1 Low)n/m6 (1 Low)14 (1 Low)
*1
28/03/2025
14:00
Bristol Temple Way
Timeseries Graph
n/m37 (1 Low)n/m7 (1 Low)12 (1 Low)
*2
28/03/2025
16:00
Charlton Mackrell
Timeseries Graph
85 (3 Low)7 (1 Low)n/m10 (1 Low)12 (1 Low)
*2
27/03/2025
24:00
Christchurch Barrack Road
Timeseries Graph
n/m16 (1 Low)n/m13 (2 Low)n/m 27/03/2025
24:00
Exeter Roadside
Timeseries Graph
75 (3 Low)25 (1 Low)n/mn/mn/m 28/03/2025
16:00
Honiton
Timeseries Graph
79 (3 Low)10 (1 Low)n/m7 (1 Low)8 (1 Low)
*2
27/03/2025
24:00
Plymouth Centre
Timeseries Graph
77 (3 Low)21 (1 Low)n/m8 (1 Low)12 (1 Low)
*2
27/03/2025
24:00
Plymouth Tavistock Road
Timeseries Graph
n/m44 (1 Low)n/mn/mn/m 28/03/2025
08:00
Saltash Callington Road
Timeseries Graph
n/mn/mn/m3 (1 Low)14 (1 Low)
*1
27/03/2025
24:00
Swindon Walcot
Timeseries Graph
80 (3 Low)9 (1 Low)n/m6 (1 Low)9 (1 Low)
*2
27/03/2025
24:00
Yarner Wood
Timeseries Graph
88 (3 Low)2 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
28/03/2025
12:00

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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
97 (3 Low)n/mn/mn/mn/m 27/03/2025
22:00

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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
72 (3 Low)37 (1 Low)n/m5 (1 Low)16 (1 Low)
*2
27/03/2025
24:00
Birmingham Ladywood
Timeseries Graph
81 (3 Low)12 (1 Low)1 (1 Low)3 (1 Low)6 (1 Low)
*2
27/03/2025
22:15
Burton-on-Trent Horninglow
Timeseries Graph
83 (3 Low)17 (1 Low)n/m3 (1 Low)6 (1 Low)
*2
27/03/2025
24:00
Cannock A5190 Roadside
Timeseries Graph
n/m16 (1 Low)n/m2 (1 Low)n/m 28/03/2025
16:00
Coventry Allesley
Timeseries Graph
78 (3 Low)11 (1 Low)n/m7 (1 Low)11 (1 Low)
*2
27/03/2025
24:00
Coventry Binley Road
Timeseries Graph
n/m34 (1 Low)n/m8 (1 Low)15 (1 Low)
*2
27/03/2025
24:00
Leamington Spa
Timeseries Graph
85 (3 Low)14 (1 Low)n/m7 (1 Low)10 (1 Low)
*2
27/03/2025
24:00
Leamington Spa Rugby Road
Timeseries Graph
n/m12 (1 Low)n/m7 (1 Low)10 (1 Low)
*2
27/03/2025
24:00
Leominster
Timeseries Graph
86 (3 Low)3 (1 Low)n/mn/mn/m 28/03/2025
16:00
Oldbury Birmingham Road
Timeseries Graph
n/m44 (1 Low)n/mn/mn/m 28/03/2025
08:00
Shrewsbury Underdale
Timeseries Graph
n/mn/mn/mn/an/a 27/03/2025
24:00
Stoke-on-Trent A50 Roadside
Timeseries Graph
n/m40 (1 Low)n/m4 (1 Low)12 (1 Low)
*2
28/03/2025
16:00
Stoke-on-Trent Centre
Timeseries Graph
73 (3 Low)16 (1 Low)n/m3 (1 Low)11 (1 Low)
*2
27/03/2025
24:00
Telford Hollinswood
Timeseries Graph
87 (3 Low)9 (1 Low)n/m2 (1 Low)5 (1 Low)
*2
28/03/2025
16:00
Walsall Woodlands
Timeseries Graph
85 (3 Low)9 (1 Low)n/mn/mn/m 28/03/2025
16:00
West Bromwich Kenrick Park
Timeseries Graph
77 (3 Low)25 (1 Low)n/mn/mn/m 28/03/2025
16:00

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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
82 (3 Low)10 (1 Low)1 (1 Low)3 (1 Low)8 (1 Low)
*2
27/03/2025
22:15
Bradford Mayo Avenue
Timeseries Graph
n/m30 (1 Low)n/mn/mn/m 27/03/2025
17:00
Bradford Shipley Airedale Road
Timeseries Graph
n/mn/mn/m5 (1 Low)16 (1 Low)
*2
27/03/2025
24:00
Dewsbury Ashworth Grange
Timeseries Graph
84 (3 Low)9 (1 Low)n/m4 (1 Low)9 (1 Low)
*2
27/03/2025
24:00
Doncaster A630 Cleveland Street
Timeseries Graph
n/m18 (1 Low)n/m7 (1 Low)n/m 27/03/2025
24:00
Harrogate Woodlands
Timeseries Graph
n/mn/mn/m8 (1 Low)41 (3 Low)
*2
28/03/2025
16:00
High Muffles
Timeseries Graph
84 (3 Low)6 (1 Low)n/m3 (1 Low)5 (1 Low)
*2
27/03/2025
24:00
Hull Freetown
Timeseries Graph
81 (3 Low)37 (1 Low)4 (1 Low)8 (1 Low)17 (2 Low)
*2
27/03/2025
18:00
Hull Holderness Road
Timeseries Graph
n/m53 (1 Low)n/m9 (1 Low)18 (2 Low)
*2
27/03/2025
24:00
Immingham Woodlands Avenue
Timeseries Graph
84 (3 Low)11 (1 Low)n/m8 (1 Low)12 (1 Low)
*2
27/03/2025
24:00
Leeds Centre
Timeseries Graph
80 (3 Low)22 (1 Low)2 (1 Low)4 (1 Low)13 (1 Low)
*2
27/03/2025
23:15
Leeds Headingley Kerbside
Timeseries Graph
n/m14 (1 Low)n/m6 (1 Low)11 (1 Low)
*1
27/03/2025
24:00
Rotherham East Dene
Timeseries Graph
n/mn/mn/m7 (1 Low)13 (1 Low)
*2
27/03/2025
24:00
Scunthorpe Town
Timeseries Graph
n/m13 (1 Low)2 (1 Low)n/m15 (1 Low)
*1
27/03/2025
16:15
Sheffield Barnsley Road
Timeseries Graph
n/m31 (1 Low)n/m5 (1 Low)n/m 27/03/2025
24:00
Sheffield Devonshire Green
Timeseries Graph
76 (3 Low)10 (1 Low)n/m4 (1 Low)8 (1 Low)
*2
27/03/2025
24:00
Sheffield Tinsley
Timeseries Graph
75 (3 Low)29 (1 Low)n/m5 (1 Low)14 (1 Low)
*2
27/03/2025
24:00
York Bootham
Timeseries Graph
75 (3 Low)13 (1 Low)n/m5 (1 Low)11 (1 Low)
*1
27/03/2025
24:00
York Fishergate
Timeseries Graph
n/m28 (1 Low)n/m3 (1 Low)25 (2 Low)
*1
27/03/2025
24:00

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