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.

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Maximum pollutant levels displayed on UK-AIR for the 24 hour period up to 4pm Fri 28th Mar 2025

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Auchencorth Moss Timeseries Graph	82 (3 Low)	n/m	n/m	2 (1 Low)	3 (1 Low) ^*2	28/03/2025 04:00
Bush Estate Timeseries Graph	92 (3 Low)	3 (1 Low)	n/m	n/m	n/m	28/03/2025 04:00
Dumbarton Roadside Timeseries Graph	n/m	15 (1 Low)	n/m	n/m	n/m	28/03/2025 15:00
Edinburgh Nicolson Street Timeseries Graph	n/m	26 (1 Low)	n/m	n/m	n/m	28/03/2025 14:00
Edinburgh St Leonards Timeseries Graph	68 (3 Low)	11 (1 Low)	n/a	3 (1 Low)	6 (1 Low) ^*2	15/03/2025 21:00
Glasgow Great Western Road Timeseries Graph	n/m	13 (1 Low)	n/m	n/m	n/m	27/03/2025 20:00
Glasgow High Street Timeseries Graph	n/m	19 (1 Low)	n/m	4 (1 Low)	8 (1 Low) ^*2	28/03/2025 03:00
Glasgow Kerbside Timeseries Graph	n/m	31 (1 Low)	n/m	n/m	n/m	28/03/2025 08:00
Glasgow Townhead Timeseries Graph	87 (3 Low)	18 (1 Low)	n/m	4 (1 Low)	7 (1 Low) ^*2	28/03/2025 02:00
Grangemouth Timeseries Graph	n/m	7 (1 Low)	3 (1 Low)	4 (1 Low)	4 (1 Low) ^*1	27/03/2025 17:15
Grangemouth Moray Timeseries Graph	n/m	6 (1 Low)	n/m	n/m	n/m	28/03/2025 09:00
Greenock A8 Roadside Timeseries Graph	n/m	24 (1 Low)	n/m	4 (1 Low)	8 (1 Low) ^*2	27/03/2025 24:00

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 PM_2.5 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/m	3 (1 Low)	6 (1 Low) ^*2	27/03/2025 24:00
Chesterfield Roadside Timeseries Graph	n/m	14 (1 Low)	n/m	3 (1 Low)	8 (1 Low) ^*2	27/03/2025 24:00
Derby St Alkmund's Way Timeseries Graph	n/m	45 (1 Low)	n/m	5 (1 Low)	n/m	27/03/2025 24:00
Derby Stockbrook Park Timeseries Graph	77 (3 Low)	n/m	n/m	3 (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/m	32 (1 Low)	n/m	6 (1 Low)	13 (1 Low) ^*2	27/03/2025 24:00
Leicester University Timeseries Graph	76 (3 Low)	17 (1 Low)	n/m	5 (1 Low)	8 (1 Low) ^*2	27/03/2025 24:00
Lincoln Canwick Road Timeseries Graph	n/m	24 (1 Low)	n/m	n/m	n/m	27/03/2025 17:00
Mansfield Ladybrook Timeseries Graph	n/m	n/m	n/m	5 (1 Low)	8 (1 Low) ^*2	27/03/2025 24:00
Northampton Spring Park Timeseries Graph	84 (3 Low)	12 (1 Low)	n/m	15 (2 Low)	n/m	27/03/2025 07:00
Nottingham Bilborough Timeseries Graph	n/m	n/m	n/m	5 (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/m	33 (1 Low)	n/m	6 (1 Low)	14 (1 Low) ^*2	27/03/2025 24:00
Tallington Timeseries Graph	86 (3 Low)	n/m	n/m	7 (1 Low)	9 (1 Low) ^*2	27/03/2025 24:00
Toft Newton Timeseries Graph	98 (3 Low)	12 (1 Low)	n/m	9 (1 Low)	13 (1 Low) ^*2	27/03/2025 24:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Borehamwood Meadow Park Timeseries Graph	n/m	11 (1 Low)	n/m	10 (1 Low)	13 (1 Low) ^*2	27/03/2025 24:00
Cambridge Roadside Timeseries Graph	n/m	33 (1 Low)	n/m	n/m	n/m	28/03/2025 15:00
Luton A505 Roadside Timeseries Graph	n/m	27 (1 Low)	n/m	11 (1 Low)	n/m	27/03/2025 24:00
Norwich Lakenfields Timeseries Graph	71 (3 Low)	15 (1 Low)	n/m	12 (2 Low)	16 (1 Low) ^*2	28/03/2025 06:00
Peterborough Garton End Timeseries Graph	n/m	n/m	n/m	9 (1 Low)	13 (1 Low) ^*2	27/03/2025 24:00
Sibton Timeseries Graph	77 (3 Low)	n/m	n/m	13 (2 Low)	20 (2 Low) ^*2	28/03/2025 06:00
Southend-on-Sea Timeseries Graph	70 (3 Low)	30 (1 Low)	n/m	12 (2 Low)	17 (2 Low) ^*2	28/03/2025 05:00
St Osyth Timeseries Graph	83 (3 Low)	22 (1 Low)	n/m	15 (2 Low)	20 (2 Low) ^*2	28/03/2025 06:00
Stanford-le-Hope Roadside Timeseries Graph	n/m	41 (1 Low)	n/m	15 (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/m	n/m	11 (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

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Camden Kerbside Timeseries Graph	n/m	74 (2 Low)	n/m	12 (2 Low)	20 (2 Low) ^*1	27/03/2025 24:00
Ealing Horn Lane Timeseries Graph	n/m	n/m	n/m	n/m	49 (3 Low) ^*1	27/03/2025 24:00
Haringey Roadside Timeseries Graph	n/m	32 (1 Low)	n/m	n/m	n/m	27/03/2025 18:00
London Bexley Timeseries Graph	n/m	31 (1 Low)	n/m	13 (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/m	10 (1 Low)	15 (1 Low) ^*2	27/03/2025 24:00
London Harlington Timeseries Graph	76 (3 Low)	26 (1 Low)	n/m	11 (1 Low)	15 (1 Low) ^*2	27/03/2025 24:00
London Hillingdon Timeseries Graph	71 (3 Low)	37 (1 Low)	n/m	11 (1 Low)	19 (2 Low) ^*2	27/03/2025 24:00
London Honor Oak Park Timeseries Graph	81 (3 Low)	n/m	n/m	10 (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/m	n/m	n/m	9 (1 Low)	14 (1 Low) ^*2	28/03/2025 03:00
London Westminster Timeseries Graph	65 (2 Low)	28 (1 Low)	n/m	9 (1 Low)	n/m	27/03/2025 24:00
Southwark A2 Old Kent Road Timeseries Graph	n/m	27 (1 Low)	n/m	n/m	18 (2 Low) ^*1	28/03/2025 12:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Fort William Timeseries Graph	90 (3 Low)	14 (1 Low)	n/m	n/m	n/m	28/03/2025 01:00
Inverness Timeseries Graph	n/m	15 (1 Low)	n/m	2 (1 Low)	3 (1 Low) ^*2	28/03/2025 16:00
Lerwick Timeseries Graph	93 (3 Low)	n/m	n/m	n/m	n/m	28/03/2025 03:00
Strathvaich Timeseries Graph	101 (4 Moderate)	n/m	n/m	n/m	n/m	27/03/2025 23:00

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 PM_2.5 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/m	3 (1 Low)	7 (1 Low) ^*2	27/03/2025 24:00
Kielder Water Timeseries Graph	78 (3 Low)	n/m	n/m	2 (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/m	6 (1 Low)	11 (1 Low) ^*1	27/03/2025 24:00
Newcastle Cradlewell Roadside Timeseries Graph	n/m	29 (1 Low)	n/m	3 (1 Low)	9 (1 Low) ^*2	27/03/2025 24:00
Stockton-on-Tees A1305 Roadside Timeseries Graph	n/m	8 (1 Low)	n/m	2 (1 Low)	n/m	28/03/2025 10:00
Stockton-on-Tees Eaglescliffe Timeseries Graph	n/m	3 (1 Low)	n/m	2 (1 Low)	8 (1 Low) ^*1	28/03/2025 16:00
Sunderland Silksworth Timeseries Graph	81 (3 Low)	9 (1 Low)	n/m	2 (1 Low)	5 (1 Low) ^*2	28/03/2025 16:00
Sunderland Wessington Way Timeseries Graph	n/m	17 (1 Low)	n/m	3 (1 Low)	n/m	28/03/2025 16:00

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 PM_2.5 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/m	2 (1 Low)	5 (1 Low) ^*2	27/03/2025 24:00
Aberdeen Wellington Road Timeseries Graph	n/m	36 (1 Low)	n/m	n/m	n/m	28/03/2025 08:00
Dundee Mains Loan Timeseries Graph	n/m	8 (1 Low)	n/m	n/m	n/m	27/03/2025 17:00
Perth Glasgow Road Timeseries Graph	n/m	20 (1 Low)	n/m	n/m	n/m	28/03/2025 09:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Aston Hill Timeseries Graph	84 (3 Low)	3 (1 Low)	n/m	n/m	n/m	28/03/2025 16:00
Wrexham Timeseries Graph	n/m	9 (1 Low)	5 (1 Low)	3 (1 Low)	6 (1 Low) ^*2	27/03/2025 20:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Birkenhead Borough Road Timeseries Graph	n/m	10 (1 Low)	n/m	4 (1 Low)	n/m	28/03/2025 16:00
Blackburn Accrington Road Timeseries Graph	n/m	23 (1 Low)	n/m	n/m	n/m	27/03/2025 19:00
Blackburn Audley Park Timeseries Graph	80 (3 Low)	n/m	n/m	4 (1 Low)	8 (1 Low) ^*2	28/03/2025 16:00
Blackpool Marton Timeseries Graph	84 (3 Low)	14 (1 Low)	n/m	6 (1 Low)	14 (1 Low) ^*2	28/03/2025 16:00
Blackpool Whitegate Drive Timeseries Graph	n/m	n/m	n/m	8 (1 Low)	n/m	28/03/2025 16:00
Bury Whitefield Roadside Timeseries Graph	n/m	16 (1 Low)	n/m	n/m	12 (1 Low) ^*1	27/03/2025 18:00
Carlisle Morton A595 Timeseries Graph	n/m	11 (1 Low)	n/m	3 (1 Low)	6 (1 Low) ^*1	28/03/2025 07:00
Crewe Coppenhall Timeseries Graph	87 (3 Low)	8 (1 Low)	n/m	3 (1 Low)	6 (1 Low) ^*2	28/03/2025 16:00
Glazebury Timeseries Graph	88 (3 Low)	7 (1 Low)	n/m	7 (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/m	n/m	4 (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/m	4 (1 Low)	8 (1 Low) ^*2	28/03/2025 16:00
Middlewich St Michael's Way Timeseries Graph	n/m	n/m	n/m	3 (1 Low)	n/m	28/03/2025 16:00
Preston Timeseries Graph	81 (3 Low)	10 (1 Low)	n/m	4 (1 Low)	10 (1 Low) ^*2	28/03/2025 16:00
Salford Eccles Timeseries Graph	85 (3 Low)	15 (1 Low)	n/m	6 (1 Low)	12 (1 Low) ^*2	27/03/2025 24:00
Shaw Crompton Way Timeseries Graph	n/m	19 (1 Low)	n/m	n/m	n/m	27/03/2025 18:00
St Helens Linkway Timeseries Graph	n/m	27 (1 Low)	n/m	n/m	14 (1 Low) ^*1	27/03/2025 20:00
Warrington Timeseries Graph	n/m	18 (1 Low)	n/m	4 (1 Low)	11 (1 Low) ^*1	27/03/2025 24:00
Widnes Milton Road Timeseries Graph	n/m	38 (1 Low)	n/m	n/m	n/m	27/03/2025 17:00
Wigan Centre Timeseries Graph	85 (3 Low)	16 (1 Low)	n/m	5 (1 Low)	11 (1 Low) ^*2	27/03/2025 24:00
Wirral Tranmere Timeseries Graph	85 (3 Low)	7 (1 Low)	n/m	4 (1 Low)	8 (1 Low) ^*2	28/03/2025 16:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Armagh Roadside Timeseries Graph	n/m	34 (1 Low)	n/m	n/m	13 (1 Low) ^*1	28/03/2025 09:00
Ballymena Antrim Road Timeseries Graph	n/m	16 (1 Low)	n/m	n/m	n/m	28/03/2025 14:00
Ballymena Ballykeel Timeseries Graph	n/m	n/a	n/a	n/m	n/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/m	47 (1 Low)	n/m	n/m	14 (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/m	n/m	4 (1 Low)	7 (1 Low) ^*2	28/03/2025 16:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Dumfries Timeseries Graph	n/m	49 (1 Low)	n/m	n/m	n/m	28/03/2025 13:00
Eskdalemuir Timeseries Graph	83 (3 Low)	2 (1 Low)	n/m	n/m	n/m	28/03/2025 16:00
Peebles Timeseries Graph	89 (3 Low)	3 (1 Low)	n/m	n/m	n/m	28/03/2025 05:00

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 PM_2.5 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/m	11 (1 Low)	14 (1 Low) ^*2	28/03/2025 01:00
Chatham Roadside Timeseries Graph	n/m	30 (1 Low)	n/m	15 (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/m	9 (1 Low)	11 (1 Low) ^*2	28/03/2025 02:00
Horley Timeseries Graph	n/m	26 (1 Low)	n/m	12 (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/m	n/m	n/m	17 (2 Low)	24 (2 Low) ^*2	28/03/2025 02:00
Milton Keynes Civic Centre Timeseries Graph	85 (3 Low)	n/m	n/m	n/a	n/a	31/01/2025 24:00
Oxford Centre Roadside Timeseries Graph	n/m	19 (1 Low)	n/m	n/m	n/m	27/03/2025 19:00
Oxford St Ebbes Timeseries Graph	83 (3 Low)	8 (1 Low)	n/m	7 (1 Low)	9 (1 Low) ^*2	27/03/2025 24:00
Portsmouth Timeseries Graph	77 (3 Low)	33 (1 Low)	n/m	12 (2 Low)	15 (1 Low) ^*2	27/03/2025 24:00
Portsmouth Anglesea Road Timeseries Graph	n/m	51 (1 Low)	n/m	12 (2 Low)	18 (2 Low) ^*2	27/03/2025 24:00
Reading London Road Timeseries Graph	n/m	n/a	n/m	n/m	14 (1 Low) ^*1	11/03/2025 19:00
Reading New Town Timeseries Graph	74 (3 Low)	9 (1 Low)	n/m	11 (1 Low)	14 (1 Low) ^*2	27/03/2025 24:00
Reading Rose Kiln Lane Timeseries Graph	n/m	n/m	n/m	9 (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/m	n/m	n/m	12 (2 Low)	20 (2 Low) ^*2	27/03/2025 24:00
Southampton A33 Timeseries Graph	n/m	48 (1 Low)	n/m	11 (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/m	29 (1 Low)	n/m	13 (2 Low)	18 (2 Low) ^*2	28/03/2025 02:00
Worthing A27 Roadside Timeseries Graph	n/m	33 (1 Low)	n/m	13 (2 Low)	n/m	27/03/2025 24:00
Worthing East Ten Acres Timeseries Graph	n/m	n/m	n/m	14 (2 Low)	17 (2 Low) ^*2	27/03/2025 24:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Cardiff Centre Timeseries Graph	n/a	n/a	n/a	n/a	n/a	25/02/2025 09:30
Cardiff Newport Road Timeseries Graph	n/m	16 (1 Low)	n/m	n/m	11 (1 Low) ^*1	27/03/2025 18:00
Chepstow A48 Timeseries Graph	n/m	42 (1 Low)	n/m	5 (1 Low)	16 (1 Low) ^*1	27/03/2025 24:00
Cwmbran Crownbridge Timeseries Graph	86 (3 Low)	6 (1 Low)	n/m	n/m	n/m	28/03/2025 16:00
Hafod-yr-ynys Hill Roadside Timeseries Graph	n/m	45 (1 Low)	n/m	n/m	n/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/m	17 (1 Low)	n/m	4 (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/m	23 (1 Low)	n/m	5 (1 Low)	13 (1 Low) ^*1	28/03/2025 16:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Barnstaple A39 Timeseries Graph	n/m	n/m	n/m	5 (1 Low)	12 (1 Low) ^*2	28/03/2025 16:00
Bath A4 Roadside Timeseries Graph	n/m	38 (1 Low)	n/m	n/m	n/m	27/03/2025 19:00
Bournemouth Timeseries Graph	81 (3 Low)	10 (1 Low)	n/m	14 (2 Low)	n/m	27/03/2025 24:00
Bristol St Paul's Timeseries Graph	78 (3 Low)	19 (1 Low)	n/m	6 (1 Low)	14 (1 Low) ^*1	28/03/2025 14:00
Bristol Temple Way Timeseries Graph	n/m	37 (1 Low)	n/m	7 (1 Low)	12 (1 Low) ^*2	28/03/2025 16:00
Charlton Mackrell Timeseries Graph	85 (3 Low)	7 (1 Low)	n/m	10 (1 Low)	12 (1 Low) ^*2	27/03/2025 24:00
Christchurch Barrack Road Timeseries Graph	n/m	16 (1 Low)	n/m	13 (2 Low)	n/m	27/03/2025 24:00
Exeter Roadside Timeseries Graph	75 (3 Low)	25 (1 Low)	n/m	n/m	n/m	28/03/2025 16:00
Honiton Timeseries Graph	79 (3 Low)	10 (1 Low)	n/m	7 (1 Low)	8 (1 Low) ^*2	27/03/2025 24:00
Plymouth Centre Timeseries Graph	77 (3 Low)	21 (1 Low)	n/m	8 (1 Low)	12 (1 Low) ^*2	27/03/2025 24:00
Plymouth Tavistock Road Timeseries Graph	n/m	44 (1 Low)	n/m	n/m	n/m	28/03/2025 08:00
Saltash Callington Road Timeseries Graph	n/m	n/m	n/m	3 (1 Low)	14 (1 Low) ^*1	27/03/2025 24:00
Swindon Walcot Timeseries Graph	80 (3 Low)	9 (1 Low)	n/m	6 (1 Low)	9 (1 Low) ^*2	27/03/2025 24:00
Yarner Wood Timeseries Graph	88 (3 Low)	2 (1 Low)	n/m	3 (1 Low)	6 (1 Low) ^*2	28/03/2025 12:00

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 PM_2.5 Particles (µgm^-3)	Running 24 Hour mean PM₁₀ Particles (µgm^-3)	Last updated
Mace Head Timeseries Graph	97 (3 Low)	n/m	n/m	n/m	n/m	27/03/2025 22:00

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 PM_2.5 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/m	5 (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/m	3 (1 Low)	6 (1 Low) ^*2	27/03/2025 24:00
Cannock A5190 Roadside Timeseries Graph	n/m	16 (1 Low)	n/m	2 (1 Low)	n/m	28/03/2025 16:00
Coventry Allesley Timeseries Graph	78 (3 Low)	11 (1 Low)	n/m	7 (1 Low)	11 (1 Low) ^*2	27/03/2025 24:00
Coventry Binley Road Timeseries Graph	n/m	34 (1 Low)	n/m	8 (1 Low)	15 (1 Low) ^*2	27/03/2025 24:00
Leamington Spa Timeseries Graph	85 (3 Low)	14 (1 Low)	n/m	7 (1 Low)	10 (1 Low) ^*2	27/03/2025 24:00
Leamington Spa Rugby Road Timeseries Graph	n/m	12 (1 Low)	n/m	7 (1 Low)	10 (1 Low) ^*2	27/03/2025 24:00
Leominster Timeseries Graph	86 (3 Low)	3 (1 Low)	n/m	n/m	n/m	28/03/2025 16:00
Oldbury Birmingham Road Timeseries Graph	n/m	44 (1 Low)	n/m	n/m	n/m	28/03/2025 08:00
Shrewsbury Underdale Timeseries Graph	n/m	n/m	n/m	n/a	n/a	27/03/2025 24:00
Stoke-on-Trent A50 Roadside Timeseries Graph	n/m	40 (1 Low)	n/m	4 (1 Low)	12 (1 Low) ^*2	28/03/2025 16:00
Stoke-on-Trent Centre Timeseries Graph	73 (3 Low)	16 (1 Low)	n/m	3 (1 Low)	11 (1 Low) ^*2	27/03/2025 24:00
Telford Hollinswood Timeseries Graph	87 (3 Low)	9 (1 Low)	n/m	2 (1 Low)	5 (1 Low) ^*2	28/03/2025 16:00
Walsall Woodlands Timeseries Graph	85 (3 Low)	9 (1 Low)	n/m	n/m	n/m	28/03/2025 16:00
West Bromwich Kenrick Park Timeseries Graph	77 (3 Low)	25 (1 Low)	n/m	n/m	n/m	28/03/2025 16:00

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 PM_2.5 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/m	30 (1 Low)	n/m	n/m	n/m	27/03/2025 17:00
Bradford Shipley Airedale Road Timeseries Graph	n/m	n/m	n/m	5 (1 Low)	16 (1 Low) ^*2	27/03/2025 24:00
Dewsbury Ashworth Grange Timeseries Graph	84 (3 Low)	9 (1 Low)	n/m	4 (1 Low)	9 (1 Low) ^*2	27/03/2025 24:00
Doncaster A630 Cleveland Street Timeseries Graph	n/m	18 (1 Low)	n/m	7 (1 Low)	n/m	27/03/2025 24:00
Harrogate Woodlands Timeseries Graph	n/m	n/m	n/m	8 (1 Low)	41 (3 Low) ^*2	28/03/2025 16:00
High Muffles Timeseries Graph	84 (3 Low)	6 (1 Low)	n/m	3 (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/m	53 (1 Low)	n/m	9 (1 Low)	18 (2 Low) ^*2	27/03/2025 24:00
Immingham Woodlands Avenue Timeseries Graph	84 (3 Low)	11 (1 Low)	n/m	8 (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/m	14 (1 Low)	n/m	6 (1 Low)	11 (1 Low) ^*1	27/03/2025 24:00
Rotherham East Dene Timeseries Graph	n/m	n/m	n/m	7 (1 Low)	13 (1 Low) ^*2	27/03/2025 24:00
Scunthorpe Town Timeseries Graph	n/m	13 (1 Low)	2 (1 Low)	n/m	15 (1 Low) ^*1	27/03/2025 16:15
Sheffield Barnsley Road Timeseries Graph	n/m	31 (1 Low)	n/m	5 (1 Low)	n/m	27/03/2025 24:00
Sheffield Devonshire Green Timeseries Graph	76 (3 Low)	10 (1 Low)	n/m	4 (1 Low)	8 (1 Low) ^*2	27/03/2025 24:00
Sheffield Tinsley Timeseries Graph	75 (3 Low)	29 (1 Low)	n/m	5 (1 Low)	14 (1 Low) ^*2	27/03/2025 24:00
York Bootham Timeseries Graph	75 (3 Low)	13 (1 Low)	n/m	5 (1 Low)	11 (1 Low) ^*1	27/03/2025 24:00
York Fishergate Timeseries Graph	n/m	28 (1 Low)	n/m	3 (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

UK AIR

Air Information Resource