Monitoring site	Hourly mean Nitrogen dioxide (µg/m³)	Hourly mean Nitric oxide (µg/m³)	Hourly mean oxides of Nitrogen (µg/m³)	Max 15 min mean Sulphur dioxide (µg/m³)	Running 24 Hour mean PM10 Particles (µg/m³)	Running 24 Hour mean PM2.5 Particles (µg/m³)
Abingdon Stert Street CLOSED	n/m	-36.5	-24.4	n/m	n/m	n/m
Ashford Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Ashford M20 Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Ashford Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Ashford Rural CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Bath A4 Roadside AURN	n/m	0.0	16.7	n/m	n/m	n/m
Bath Chelsea House CLOSED	n/m	No Data	0	n/m	n/m	n/m
Bath Gay Street Zephyr	n/m	13.8	0	n/m	n/m	n/m
Bath Windsor Bridge	n/m	12.2	44.0	n/m	n/m	n/m
Bedford Kempston CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Bedford Lurke Street CLOSED	n/m	No Data	0	n/m	n/m	n/m
Bedford Prebend Street CLOSED	n/m	No Data	0	n/m	n/m	n/m
Bedford Stewartby CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Belfast Centre AURN	n/m	4.5	40.9	n/m	n/m	n/m
Belfast Newtownards Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Belfast Ormeau Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Belfast Stockmans Lane FDMS CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Belfast Stockmans Lane NOx CLOSED	n/m	No Data	0	n/m	n/m	n/m
Belfast Westlink Roden Street BAM CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Belfast Westlink Roden Street NOx CLOSED	n/m	No Data	0	n/m	n/m	n/m
Birkenhead Borough Road AURN	n/m	2.7	11.1	n/m	n/m	n/m
Blackburn Accrington Road AURN	n/m	2.5	14.5	n/m	n/m	n/m
Blackburn Darwen Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Bradford Apperley Bridge Marina Zephyr	n/m	0.0	0	n/m	n/m	n/m
Bradford Cavendish Prim Sch Hall Rd Zephyr	n/m	1.1	0	n/m	n/m	n/m
Bradford East Bowling Flockton Grove Zephyr	n/m	0.0	0	n/m	n/m	n/m
Bradford Farfield Prim Sch Reevy Cres Zephyr	n/m	8.6	0	n/m	n/m	n/m
Bradford Girlington St Leonards Road Zephyr	n/m	3.9	0	n/m	n/m	n/m
Bradford Gt Horton All Saints Prim Sch Zephyr	n/m	0.2	0	n/m	n/m	n/m
Bradford Horton Aberdeen Place Zephyr	n/m	2.4	0	n/m	n/m	n/m
Bradford Ilkley Grove Road Zephyr	n/m	1.0	0	n/m	n/m	n/m
Bradford Keighley	n/m	3.5	7.3	n/m	n/m	n/m
Bradford Keighley Zephyr	n/m	4.0	0	n/m	n/m	n/m
Bradford Low Moor First Street Zephyr	n/m	3.6	0	n/m	n/m	n/m
Bradford Mannigham Lane	n/m	0.1	-2.3	n/m	n/m	n/m
Bradford Mayo Avenue AURN	n/m	No Data	0	n/m	n/m	n/m
Bradford Rooley Lane	n/m	1.0	4.0	n/m	n/m	n/m
Bradford Saltaire Titus Street Zephyr	n/m	0.2	0	n/m	n/m	n/m
Bradford Silsden Hothfield Street Zephyr	n/m	0.5	0	n/m	n/m	n/m
Bradford Thornton Road	n/m	0.6	2.9	n/m	n/m	n/m
Bradford Tong Street	n/m	1.6	7.8	n/m	n/m	n/m
Bradford Treadwell Mills	n/m	No Data	0	n/m	n/m	n/m
Breckland East Wretham CLOSED	n/m	No Data	0	n/m	n/m	n/m
Bristol St Paul's AURN	n/m	0.6	12.4	n/m	n/m	n/m
Bristol Temple Way AURN	n/m	12.5	43.0	n/m	n/m	n/m
Broxbourne College Road A10 CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Broxbourne Eleanor Cross CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Broxtowe Trowell Zephyr	n/m	76.6	0	n/m	n/m	n/m
Burton-on-Trent Horninglow AURN	n/m	0.5	9.6	n/m	n/m	n/m
Cambridge Roadside AURN	n/m	24.3	57.4	n/m	n/m	n/m
Cannock A5190 Roadside AURN	n/m	0.4	6.7	n/m	n/m	n/m
Cannock Chase Bridgtown CLOSED	n/m	No Data	0	n/m	n/m	n/m
Cannock Chase Norton Canes CLOSED	n/m	No Data	0	n/m	n/m	n/m
Cannock Watling Street AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
Canterbury AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
Canterbury Military Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Canterbury North Lane CLOSED	n/m	No Data	0	n/m	n/m	n/m
Canterbury Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Canterbury St. Peters Place CLOSED	n/m	No Data	0	n/m	n/m	n/m
Castlereagh Dundonald	n/m	62.4	156.3	n/m	n/m	n/m
Central Beds Marston Vale CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Chatham Luton Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Chatham Roadside AURN	n/m	11.8	36.5	n/m	n/m	n/m
Chester Boughton	n/m	3.4	9.6	n/m	n/m	n/m
Chester Bus Interchange	n/m	25.6	67.9	n/m	n/m	n/m
Crewe Coppenhall AURN	n/m	1.0	7.3	n/m	n/m	n/m
Dacorum Hemel Hempstead 2 CLOSED	n/m	No Data	0	n/m	n/m	n/m
Dacorum Northchurch High Street CLOSED	n/m	No Data	0	n/m	n/m	n/m
Dacorum Northchurch High Street CLOSED	n/m	No Data	0	n/m	n/m	n/m
Doncaster A630 Cleveland Street AURN	n/m	8	31	n/m	n/m	n/m
Dover Background 2 CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Dover Centre Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Dover Docks CLOSED	n/m	No Data	0	n/m	n/m	n/m
Dover Langdon Cliff CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Dover Old Town Hall Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Downpatrick Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Durham Crossgate CLOSED	n/m	No Data	0	n/m	n/m	n/m
Durham Gilesgate CLOSED	n/m	No Data	0	n/m	n/m	n/m
Durham Hawthorne Terrace CLOSED	n/m	No Data	0	n/m	n/m	n/m
Durham Leazes Road	n/m	39.9	99.0	n/m	n/m	n/m
Durham New Elvet CLOSED	n/m	No Data	0	n/m	n/m	n/m
East Hampshire Bordon CLOSED	n/m	No Data	0	n/m	n/m	n/m
East Herts Anstey CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
East Herts Bishops Stortford CLOSED	n/m	No Data	0	n/m	n/m	n/m
East Herts Hertford Gascoyne Way CLOSED	n/m	No Data	0	n/m	n/m	n/m
East Herts Throcking CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
East Herts Ware CLOSED	n/m	No Data	0	n/m	n/m	n/m
East Staffordshire Derby Turn BAM CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
East Staffordshire Derby Turn CLOSED	n/m	No Data	0	n/m	n/m	n/m
East Staffordshire Derby Turn NOx CLOSED	n/m	No Data	0	n/m	n/m	n/m
EH Sawbridgeworth Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
EH Sawbridgeworth Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Ellesmere Port Library CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Ellesmere Port Stanney Grange CLOSED	n/m	No Data	0	n/m	n/m	n/m
Ellesmere Port Whitby Road	n/m	10.6	25.3	n/m	n/m	n/m
Elmbridge Esher High Street	n/m	n/m	n/m	n/m	n/m	n/m
Elmbridge Hampton Court Parade	n/m	No Data	0	n/m	n/m	n/m
Elmbridge Weybridge High St 2	n/m	3.1	10.1	n/m	n/m	n/m
Elmbridge Weybridge High St CLOSED	n/m	No Data	0	n/m	n/m	n/m
Elton School Lane	n/m	n/m	n/m	n/m	n/m	n/m
Folkestone Suburban CLOSED	n/m	No Data	0	n/m	n/m	n/m
Frodsham Langdale Way	n/m	0.4	1.7	n/m	n/m	n/m
Gedling Daybrook	n/m	15.6	46.9	n/m	n/m	n/m
Gosport Tichborne Way CLOSED	n/m	No Data	0	n/m	n/m	n/m
Grantham Wharf Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Gravesham A2 Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Gravesham Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Gravesham Industrial Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Great Yarmouth Gorleston CLOSED	n/m	No Data	0	n/m	n/m	n/m
Great Yarmouth South Denes	n/m	8.4	28.7	n/m	n/m	n/m
Great Yarmouth South Denes Zephyr	n/m	5	0	n/m	n/m	n/m
Harborough CLOSED	n/m	70.8	153.0	n/m	n/m	n/m
Hart Blackwater CLOSED	n/m	No Data	0	n/m	n/m	n/m
Helsby Mountain View CLOSED	n/m	No Data	0	n/m	n/m	n/m
Hertsmere Borehamwood 1 CLOSED	n/m	No Data	0	n/m	n/m	n/m
Hertsmere Borehamwood Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Hertsmere Borehamwood CLOSED	n/m	No Data	0	n/m	n/m	n/m
Hertsmere Borehamwood Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Hull Freetown AURN	n/m	3.9	24.5	n/m	n/m	n/m
Hull Holderness Road AURN	n/m	28.1	77.3	n/m	n/m	n/m
Immingham Woodlands Avenue AURN	n/m	0.6	3.1	n/m	n/m	n/m
Ipswich Chevallier Street CLOSED	n/m	No Data	0	n/m	n/m	n/m
Ipswich Pipers Court CLOSED	n/m	No Data	0	n/m	n/m	n/m
Kidderminster Horsefair Zephyr CLOSED	n/m	43.8	0	n/m	n/m	n/m
Kidderminster Stourport Road	n/m	3.1	11.0	n/m	n/m	n/m
King’s Lynn North Lynn CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
King’s Lynn Stoke Ferry Furlong Road CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
King's Lynn Estuary Close	n/m	n/m	n/m	n/m	n/m	n/m
King's Lynn Foxes Lane Osiris	n/m	n/m	n/m	n/m	n/m	n/m
Kings Lynn Gaywood	n/m	No Data	0	n/m	n/m	n/m
Kings Lynn Leziate CLOSED	n/m	No Data	0	n/m	n/m	n/m
Kings Lynn Leziate OSIRIS CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
King's Lynn Page Stair Lane Osiris CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Kings Lynn Parkway Osiris	n/m	n/m	n/m	n/m	n/m	n/m
King's Lynn Railway Road Zephyr	n/m	15	0	n/m	n/m	n/m
Kings Lynn Southgates	n/m	3.4	9.6	n/m	n/m	n/m
King's Lynn St Michael's CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
King's Lynn Stoke Ferry Buckenham Drive CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Kings Lynn Stoke Ferry Indigo Road Osiris	n/m	n/m	n/m	n/m	n/m	n/m
King's Lynn Stoke Ferry TEOM CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Kings Lynn Stoke Ferry Wretton Road Osiris CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Lancaster Cable Street	n/m	8.1	27.7	n/m	n/m	n/m
Lancaster Dalton Square CLOSED	n/m	17.5	41.1	n/m	n/m	n/m
Leicester A594 Roadside AURN	n/m	14.6	50.3	n/m	n/m	n/m
Leicester University AURN	n/m	0.5	7.1	n/m	n/m	n/m
Limavady Dungiven CLOSED	n/m	No Data	0	n/m	n/m	n/m
Lisburn Dunmurry Seymour Hill	n/m	n/m	n/m	n/m	n/m	n/m
Lisburn Dunmurry Seymour Hill CLOSED	n/m	No Data	0	n/m	n/m	n/m
Lisburn Dunmurry Seymour Hill PM2.5	n/m	n/m	n/m	n/m	n/m	n/m
Lisburn Lagan Valley Hospital CLOSED	n/m	No Data	0	n/m	n/m	n/m
Liverpool Centre AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
Liverpool Clayton Square CLOSED	n/m	No Data	0	n/m	n/m	n/m
Liverpool Edge Lane CLOSED	n/m	5.2	29.1	n/m	n/m	n/m
Liverpool Everton Valley CLOSED	n/m	11.1	38.3	n/m	n/m	n/m
Liverpool Hunter Street	n/m	10	38	n/m	n/m	n/m
Liverpool Islington CLOSED	n/m	No Data	0	n/m	n/m	n/m
Liverpool Lime Street CLOSED	n/m	8.7	45.1	n/m	n/m	n/m
Liverpool Old Haymarket Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Liverpool Pembroke Place	n/m	0	3	n/m	n/m	n/m
Liverpool Queen's Drive Roadside AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
Liverpool Speke AURN	n/m	0.5	13.2	n/m	n/m	n/m
Liverpool Speke Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Liverpool Walton Vale	n/m	16.5	45.4	n/m	n/m	n/m
London Bexley AURN	n/m	0.5	8.6	n/m	n/m	n/m
London Haringey AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
London Haringey Priory Park South AURN	n/m	0.7	10.5	n/m	n/m	n/m
London Haringey Roadside AURN	n/m	No Data	0	n/m	n/m	n/m
London Harrow Stanmore Background	n/m	No Data	0	n/m	n/m	n/m
London Waltham Forest Chingford CLOSED	n/m	No Data	0	n/m	n/m	n/m
London Waltham Forest Crooked Billet CLOSED	n/m	No Data	0	n/m	n/m	n/m
London Waltham Forest Dawlish Rd CLOSED	n/m	No Data	0	n/m	n/m	n/m
London Waltham Forest Leyton CLOSED	n/m	No Data	0	n/m	n/m	n/m
Luton A505 Roadside AURN	n/m	7.1	17.6	n/m	n/m	n/m
Luton Airport CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Luton Challney Community College CLOSED	n/m	No Data	0	n/m	n/m	n/m
Luton Dunstable Road East CLOSED	n/m	No Data	0	n/m	n/m	n/m
Maidstone A229 Kerbside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Maidstone Rural CLOSED	n/m	No Data	0	n/m	n/m	n/m
Maidstone Upper Stone Street CLOSED	n/m	No Data	0	n/m	n/m	n/m
Mid Beds Biggleswade CLOSED	n/m	No Data	0	n/m	n/m	n/m
Mid Beds Sandy CLOSED	n/m	No Data	0	n/m	n/m	n/m
Mid Beds Silsoe CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Newcastle Centre AURN	n/m	1.9	26.8	n/m	n/m	n/m
Newcastle Cradlewell Roadside AURN	n/m	44.6	122.0	n/m	n/m	n/m
Newcastle Gosforth High Street CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Newcastle Percy Street	n/m	28.7	93.2	n/m	n/m	n/m
Newcastle Pilgrim Street	n/m	39.6	84.2	n/m	n/m	n/m
Newcastle-under-Lyme Queens Gardens CLOSED	n/m	No Data	0	n/m	n/m	n/m
Newtownabbey Antrim Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Newtownabbey Ballyclare Main St CLOSED	n/m	No Data	0	n/m	n/m	n/m
Newtownabbey Sandyknowes CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Down Holywood A2	n/m	46.4	122.6	n/m	n/m	n/m
North Herts Baldock 1 CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Herts Baldock 2 CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Herts Baldock CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Herts Breechwood Green CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Herts Hitchin Library CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Herts Hitchin Stevenage Rd CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
North Herts Hitchin Stevenage Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Herts Royston CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Lincs Appleby Village CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
North Lincs Killingholme East Halton Road CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
North Lincs Killingholme Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
North Lincs Killingholme School	n/m	5.6	13.4	n/m	n/m	n/m
North Lincs Santon	n/m	3.3	21.0	n/m	n/m	n/m
North Lincs Santon FDMS CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
North Lincs Santon PM10 CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
North Lincs South Ferriby Osiris CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Norwich Castle Meadow 2	n/m	19.7	50.7	n/m	n/m	n/m
Norwich Castle Meadow CLOSED	n/m	No Data	0	n/m	n/m	n/m
Norwich Lakenfields AURN	n/m	0.0	8.0	n/m	n/m	n/m
Nottingham Bilborough AURN	n/m	n/m	n/m	n/m	n/m	n/m
Nottingham Carter Gate	n/m	2.5	21.6	n/m	n/m	n/m
Nottingham Centre AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
Nottingham Kenmore Gardens AURN	n/m	1	14	n/m	n/m	n/m
Nottingham Lace Street	n/m	10.6	41.1	n/m	n/m	n/m
Nottingham St Andrews Road	n/m	24.6	74.1	n/m	n/m	n/m
Nottingham Western Boulevard AURN	n/m	4.7	21.2	n/m	n/m	n/m
Oadby Zephyr	n/m	13.8	0	n/m	n/m	n/m
Oldbury Birmingham Road AURN	n/m	18.2	49.9	n/m	n/m	n/m
Oxford Centre Roadside AURN	n/m	No Data	0	n/m	n/m	n/m
Oxford St Ebbes AURN	n/m	1.0	19.5	n/m	n/m	n/m
Pendle Colne Skipton Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Portsmouth Anglesea Road AURN	n/m	No Data	0	n/m	n/m	n/m
Portsmouth AURN	n/m	0.0	7.3	n/m	n/m	n/m
Preston AURN	n/m	0.6	10.1	n/m	n/m	n/m
Preston Meadow Street Ringway	n/m	8.4	31.6	n/m	n/m	n/m
Reading New Town AURN	n/m	No Data	0	n/m	n/m	n/m
Rochester Stoke AURN	n/m	0.2	4.8	n/m	n/m	n/m
Rushcliffe A52 Stragglethorpe Road CLOSED	n/m	22.4	69.3	n/m	n/m	n/m
Rushcliffe Loughborough Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Rushcliffe Trent Bridge Roadside CLOSED	n/m	58.9	132.0	n/m	n/m	n/m
Sandy Roadside AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
Scunthorpe Amvale CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Scunthorpe East Common Lane	n/m	n/m	n/m	n/m	n/m	n/m
Scunthorpe East Common Lane Osiris	n/m	n/m	n/m	n/m	n/m	n/m
Scunthorpe High Street East	n/m	n/m	n/m	n/m	n/m	n/m
Scunthorpe Lakeside CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Scunthorpe Redbourn Club CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Scunthorpe Town AURN	n/m	1.1	6.5	n/m	n/m	n/m
Scunthorpe Town TEOM	n/m	n/m	n/m	n/m	n/m	n/m
Sevenoaks 1 CLOSED	n/m	No Data	0	n/m	n/m	n/m
South Beds Dunstable CLOSED	n/m	No Data	0	n/m	n/m	n/m
South Glos Badminton CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
South Glos Coldharbour Lane A4174	n/m	2.2	11.0	n/m	n/m	n/m
South Glos Filton CLOSED	n/m	No Data	0	n/m	n/m	n/m
South Glos Hambrook A4174	n/m	0.0	3.8	n/m	n/m	n/m
South Glos Yate	n/m	No Data	0	n/m	n/m	n/m
South Norfolk Long Stratton CLOSED	n/m	No Data	0	n/m	n/m	n/m
South Staffordshire Penkridge CLOSED	n/m	No Data	0	n/m	n/m	n/m
South Tyneside Boldon Lane	n/m	14.3	39.2	n/m	n/m	n/m
South Tyneside Edinburgh Road	n/m	1.6	36.8	n/m	n/m	n/m
South Tyneside Hall Road	n/m	5	16	n/m	n/m	n/m
South Tyneside Tyne Dock CLOSED	n/m	No Data	0	n/m	n/m	n/m
Southampton A33 AURN	n/m	23.8	77.6	n/m	n/m	n/m
Southampton Centre AURN	n/m	5.4	32.7	n/m	n/m	n/m
Southampton Onslow Road	n/m	5.6	30.6	n/m	n/m	n/m
Southampton Victoria Road	n/m	4.4	19.1	n/m	n/m	n/m
St Albans Fleetville CLOSED	n/m	No Data	0	n/m	n/m	n/m
St. Helens Borough Road	n/m	2.2	13.9	n/m	n/m	n/m
St. Helens Linkway	n/m	No Data	0	n/m	n/m	n/m
St. Helens Newton Southworth Road	n/m	No Data	0	n/m	n/m	n/m
St. Helens Newton-le-Willows High Street	n/m	3.1	16.7	n/m	n/m	n/m
Stanford-le-Hope Roadside AURN	n/m	0.7	10.5	n/m	n/m	n/m
Stevenage AURN CLOSED	n/m	No Data	0	n/m	n/m	n/m
Stevenage Lytton Way CLOSED	n/m	1.0	4.0	n/m	n/m	n/m
Stevenage Lytton Way CLOSED	n/m	No Data	0	n/m	n/m	n/m
Stewartby AURN CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Stoke-on-Trent A50 Roadside AURN	n/m	32.7	79.8	n/m	n/m	n/m
Stoke-on-Trent Centre AURN	n/m	0.6	9.6	n/m	n/m	n/m
Sunderland Silksworth AURN	n/m	0.6	5.7	n/m	n/m	n/m
Sunderland Trimdon Street CLOSED	n/m	22.0	61.0	n/m	n/m	n/m
Sunderland Wessington Way AURN	n/m	2.4	11.3	n/m	n/m	n/m
Surrey Heath Camberley	n/m	No Data	0	n/m	n/m	n/m
Surrey Heath Camberley NOx CLOSED	n/m	No Data	0	n/m	n/m	n/m
Swaffham CLOSED	n/m	No Data	0	n/m	n/m	n/m
Swale Newington 3 CLOSED	n/m	No Data	0	n/m	n/m	n/m
Swale Newington CLOSED	n/m	No Data	0	n/m	n/m	n/m
Swale Ospringe Roadside 2 CLOSED	n/m	25.0	57.0	n/m	n/m	n/m
Swale Ospringe Roadside 2 CLOSED	n/m	No Data	0	n/m	n/m	n/m
Swale Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Swale Sheerness CLOSED	n/m	No Data	0	n/m	n/m	n/m
Swale St Pauls Street CLOSED	n/m	No Data	0	n/m	n/m	n/m
Telford Hollinswood AURN	n/m	1.0	5.2	n/m	n/m	n/m
Thanet Airport CLOSED	n/m	No Data	0	n/m	n/m	n/m
Thanet Birchington Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Thanet Margate Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Thanet Ramsgate Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Thanet Rural CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Thornton-le-Moors Park Road	n/m	No Data	0	n/m	n/m	n/m
Thornton-le-Moors Village Hall CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
Three Rivers Rickmansworth CLOSED	n/m	No Data	0	n/m	n/m	n/m
Three Rivers Rickmansworth Road CLOSED	n/m	No Data	0	n/m	n/m	n/m
Thurrock AURN	n/m	3.1	15.1	n/m	n/m	n/m
Tonbridge & Malling Wateringbury Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Tonbridge Roadside 2 CLOSED	n/m	No Data	0	n/m	n/m	n/m
Tonbridge Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Tunbridge Wells A26 Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Tunbridge Wells Southborough CLOSED	n/m	No Data	0	n/m	n/m	n/m
Tunbridge Wells Town Centre CLOSED	n/m	No Data	0	n/m	n/m	n/m
Walsall Woodlands AURN	n/m	0.7	7.5	n/m	n/m	n/m
Warrington AURN	n/m	No Data	0	n/m	n/m	n/m
Warrington Chester Road	n/m	9.4	28.2	n/m	n/m	n/m
Warrington Old Liverpool Road	n/m	1.5	5.4	n/m	n/m	n/m
Warrington Parker St	n/m	19.3	56.4	n/m	n/m	n/m
Warrington Sankey Way	n/m	1.2	5.7	n/m	n/m	n/m
Watford Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Watford Town Hall CLOSED	n/m	No Data	0	n/m	n/m	n/m
Watford Town Hall CLOSED	n/m	No Data	0	n/m	n/m	n/m
Welwyn Hatfield CLOSED	n/m	No Data	0	n/m	n/m	n/m
Welwyn Hatfield Great North Road CLOSED	n/m	n/m	n/m	n/m	n/m	n/m
West Bromwich Kenrick Park AURN	n/m	1.5	9.2	n/m	n/m	n/m
Weybourne AURN	n/m	n/m	n/m	n/m	n/m	n/m
Widnes Marzahn Way CLOSED	n/m	No Data	0	n/m	n/m	n/m
Widnes Milton Road AURN	n/m	4.9	20.5	n/m	n/m	n/m
Wigston Blaby Road	n/m	9.7	27.7	n/m	n/m	n/m
Winchester Background CLOSED	n/m	No Data	0	n/m	n/m	n/m
Winchester Chesil Street CLOSED	n/m	25.3	80.8	n/m	n/m	n/m
Winchester Roadside CLOSED	n/m	No Data	0	n/m	n/m	n/m
Winchester Romsey Road	n/m	10.1	32.7	n/m	n/m	n/m
Winchester St Georges Street	n/m	No Data	0	n/m	n/m	n/m
Wirral Tranmere AURN	n/m	0.4	5.4	n/m	n/m	n/m
Wolverhampton Penn Road	n/m	25.6	65.0	n/m	n/m	n/m
Wolverhampton St Peter's Square	n/m	1.2	25.8	n/m	n/m	n/m
Wolverhampton Stafford Road CLOSED	n/m	47.7	115.2	n/m	n/m	n/m
Wolverhampton Willenhall Road	n/m	2.5	14.3	n/m	n/m	n/m
Wrexham AURN	n/m	8.1	25.1	n/m	n/m	n/m
Wychbold	n/m	14.0	43.0	n/m	n/m	n/m
Wycombe Abbey 4 CLOSED	n/m	No Data	0	n/m	n/m	n/m
Wycombe Abbey 5 CLOSED	n/m	4.0	17.0	n/m	n/m	n/m
Wycombe Abbey CLOSED	n/m	No Data	0	n/m	n/m	n/m
Wycombe Hughenden CLOSED	n/m	No Data	0	n/m	n/m	n/m
Wycombe Stokenchurch CLOSED	n/m	4.7	13.4	n/m	n/m	n/m
Wycombe West CLOSED	n/m	No Data	0	n/m	n/m	n/m
York Bootham AURN	n/m	0.2	4.6	n/m	n/m	n/m
York Fishergate AURN	n/m	2.4	8.8	n/m	n/m	n/m

Monitoring site	Hourly mean Nitrogen dioxide (µg/m³)	Hourly mean Nitric oxide (µg/m³)	Hourly mean oxides of Nitrogen (µg/m³)	Max 15 min mean Sulphur dioxide (µg/m³)	Running 24 Hour mean PM10 Particles (µg/m³)	Running 24 Hour mean PM2.5 Particles (µg/m³)
Kings Lynn Southgates PM10	n/m	n/m	n/m	n/m	n/m	n/m
Swale Canterbury Road CLOSED	n/m	No Data	0	n/m	n/m	n/m