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LAQN Pollution Levels
Broxbourne (Roadside) (closed)
Hertsmere Borehamwood 2 (Background) (Level 3)
Watford (Roadside) (closed)
Watford (Roadside) (Level 2)
Enfield 2 - Church Street (closed)
Hertsmere Bwood 1 (Background) (closed)
Enfield 1 - Bushhill Park (closed)
Enfield 3 - Salisbury Sch Ponders End (closed)
Three Rivers Rickmansworth (Background) (no data)
Waltham Forest 3 (FDMS) - Chingford (closed)
Brentwood 1 - Town Hall (Level 1)
Waltham Forest 3 - Chingford (closed)
Enfield 4 - Derby Road Upper Edmonton (Level 1)
Harrow 1 - Stanmore Background (Level 1)
Barnet 1 - Tally Ho Corner (Level 2)
Enfield 5 - Bowes Road A406 (no data)
Enfield 5 (FDMS) - Bowes Road A406 (no data)
Havering 2 - Harold Hill (closed)
Haringey 3 - Bounds Green (closed)
Waltham Forest 4 - Crooked Billet (Level 2)
Barnet 3 - Strawberry Vale (closed)
Haringey 1 - Town Hall (FDMS) (no data)
Haringey 1 - Town Hall (Level 1)
Redbridge 5 - A406 Southend Rd (Level 1)
Redbridge 3 - Fullwell Cross (Level 1)
Barnet 2 - Finchley (Level 2)
Brent 1 - Kingsbury (Level 3)
Harrow 2 - North Harrow Roadside (Level 2)
Haringey 2 - Priory Park (Level 3)
Redbridge 4 - Gardner Close (Level 1)
Havering 3 - Romford (Level 1)
Havering 3 - FDMS (no data)
Redbridge 1 - Perth Terrace (Level 2)
Barking and Dagenham 1 - Rush Green (no data)
Waltham Forest 2 - Mobile (closed)
Waltham Forest 1 - Dawlish Road (no data)
Redbridge 2 - Ilford Broadway (closed)
Islington 4 - Foxham Gardens (closed)
Hackney 4 - Clapton (Level 2)
Islington 6 - Arsenal (Level 2)
Waltham Forest 5 - Leyton (Level 1)
Brent 2 - Ikea Car Park (closed)
Islington 2 - Holloway Road (Level 2)
Brent 4 - Ikea (no data)
Brent 5 - Neasden Lane (Level 6)
Hillingdon 1 - South Ruislip (Level 2)
Camden 1 - Swiss Cottage (FDMS) (no data)
Camden 1 - Swiss Cottage (no data)
Barking and Dagenham 3 - North Street (Level 1)
Ealing 10 - Greenford (closed)
Islington 1 - Upper Street (closed)
Brent 6 - John Keble Primary School (Level 2)
Brent 3 - Harlesden (closed)
Brent 7 - St Marys Primary School (no data)
Barking and Dagenham 2 - Scrattons Farm (Level 2)
Islington 5 - Duncan Terrace (closed)
Hammersmith and Fulham 3 - Scrubs Lane (closed)
Ealing 6 - Hanger Lane (no data)
Tower Hamlets 3 - Bethnal Green (Level 2)
Marylebone Rd - Baker St Kerbside (closed)
Hackney 6 - Old Street (Level 2)
Havering 1 - Rainham (Level 1)
Tower Hamlets 2 - Mile End Rd (Level 1)
Marylebone Rd - Baker St (Level 3)
Marylebone Road (FDMS) (no data)
Bloomsbury - AURN (no data)
Hillingdon 2 - Hillingdon Hospital (Level 2)
Ealing 9 - Court Way Acton (closed)
Camden 5 - St Martins College NOX 2 (Level 1)
City of London 4 - Beech Street (closed)
Kens and Chelsea 1 - North Kensington (Level 3)
Kens and Chelsea 1 (FDMS) - N Kensington (no data)
Camden 4 - St Martins College NOX 1 (Level 1)
Tower Hamlets 4 - Blackwall (no data)
Ealing 8 - Horn Lane (Level 5)
Camden 3 - Shaftesbury Avenue (Level 3)
City of London 2 - Farringdon Street (closed)
City of London 3 - Sir John Cass School (Level 1)
Bexley 3 - Thamesmead (no data)
City of London 1 - Senator House (Level 2)
City of London 6 - Wallbrook Wharf (Level 1)
Tower Hamlets 1 - Poplar (Level 3)
Ealing 1 - Ealing Town Hall (no data)
Westminster 4 - Charing Cross Library (no data)
Upper Thames Street (no data)
Ealing 2 (FDMS) - Acton Town Hall (no data)
Ealing 7 - Southall (Level 2)
Ealing 2 - Acton Town Hall (Level 2)
Victoria Street - TRL (closed)
Hammersmith and Fulham 2 - Brook Green (closed)
Kens and Chelsea 3 - Knightsbridge (Level 1)
Kens and Chelsea 2 - Cromwell Rd (Level 2)
Westminster AURN (no data)
Greenwich 12 - Millennium Village (Level 1)
Bexley 2 - Belvedere (Level 1)
Bexley 2 (FDMS) - Belvedere (no data)
West London - AURN (closed)
Bridge Place - AURN (closed)
Greenwich 10 - A206 Burrage Grove (Level 1)
Greenwich 10 (FDMS) - A206 Burrage Grove (no data)
Hillingdon - AURN (no data)
Hounslow 1 - Brentford (closed)
Hounslow 4 - Chiswick High Rd (Level 2)
Southwark 1 - Elephant and Castle (closed)
Greenwich 13 - Plumstead High Street (Level 2)
Hammersmith and Fulham 1 Broadway FDMS (closed)
Hammersmith and Fulham 1 - Broadway (closed)
Kens and Chelsea 5 - Earls Court Rd (no data)
Greenwich 8 - Woolwich Flyover (Level 3)
Lambeth 2 - Vauxhall Cross (closed)
Hounslow 5 - Brentford (Level 3)
Kens and Chelsea 4 - Kings Rd (Level 1)
Lambeth 5 (no data)
Greenwich 5 - Trafalgar Road (Level 2)
Thurrock 8 - Purfleet B (Level 1)
Thurrock 2 - Purfleet (closed)
Harlington - AURN (Level 2)
Thurrock 1 - AURN (no data)
Hounslow 3 - Brentford (closed)
Lambeth 5 - Spare (closed)
Southwark 2 - Old Kent Road (closed)
Bexley 5 - Bedonwell (closed)
Bexley 4 - Erith (Level 2)
Richmond 1 - Castelnau (Level 2)
Hounslow 2 - Cranford (Level 2)
Hillingdon 3 - Oxford Avenue (Level 1)
Lewisham 2 - New Cross (Level 2)
Greenwich 7 (FDMS) - Blackheath (no data)
Hounslow 6 - Heston Road (Level 2)
Heathrow Airport (Level 1)
Greenwich 7 - Blackheath (Level 1)
Richmond 2 - Barnes Wetlands (no data)
Bexley 1 - Slade Green AURN (no data)
Bexley 1 - Slade Green AURN (Level 3)
Bexley 7 (FDMS) - Thames Rd North (no data)
Bexley 7 - Thames Rd North (Level 2)
Lambeth 4 - Brixton Road (Level 3)
Lambeth 3 - Loughborough Junct (Level 1)
Greenwich Bexley 6 - A2 Falconwood FDMS (no data)
Greenwich Bexley 6 - A2 Falconwood (Level 2)
Bexley 8 - Thames Rd South (Level 2)
Hounslow 7 - Hatton Cross (Level 1)
Wandsworth 2 - Town Hall (Level 2)
Greenwich 9 - Westhorne Ave (Level 2)
Greenwich 4 - Eltham (Level 3)
Greenwich 4 (FDMS) - Eltham (no data)
Dartford Roadside 1 - St Clements (no data)
Wandsworth 3 - Roehampton (closed)
Wandsworth 1 - Garett Lane (closed)
Wandsworth 4 - High Street (closed)
Wandsworth 4 (FDMS) - High Street (closed)
Dartford Roadside 2 - Town Centre (no data)
Lewisham 1 - Catford (Level 2)
Lambeth 1 - Christchurch Road (Level 1)
Dartford Roadside 3 - Bean Interchange (no data)
Crystal Palace 1 - C Palace Parade (Level 1)
Wandsworth 6 - Tooting (Level 2)
Teddington - AURN (no data)
Richmond 31 - Upper Teddington Road (Level 2)
Bromley Rent office (closed)
Kingston 2 - Town Centre (closed)
Croydon 5 - Norbury (Level 1)
Bromley 7 - Central (Level 1)
Bromley 4 - Tweedy Rd (closed)
Croydon 3 - Thornton Heath (Level 3)
Elmbridge 3 - Hampton Court Parade (no data)
Sevenoaks 1 (closed)
Sutton 5 - Beddington Lane (Level 3)
Elmbridge 4 - Walton High Street (no data)
Croydon 6 - Euston Road (closed)
Sutton 6 - Worcester Park (Level 1)
Sutton 2 - North Cheam (closed)
Croydon 4 - George Street (Level 2)
A3 - AURN (closed)
Elmbridge 1 - Bell Farm Hersham (no data)
Elmbridge 2 - Esher High Street (no data)
Sutton 1 - Town Centre (closed)
Sutton 3 - Carshalton (Level 3)
Croydon 2 - Purley Way (no data)
Sutton 4 - Wallington (Level 2)
Kingston 1 - Chessington (closed)
Bromley 5 - Biggin Hill (Level 2)
Mole Valley 2 - Lower Ashtead (closed)
Mole Valley 1 - Leatherhead (closed)
Sevenoaks Background - Greatness (Level 2)
Sevenoaks Roadside - Bat and Ball (Level 2)
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Air pollution levels recorded on Friday 3 July 2009, 18:00-19:00BST
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How the bands are calculated
This map shows the latest hourly readings downloaded from LAQN pollution analysers. Not all analysers on the network are contacted every hour, so some sites may show 'no data'. Data have undergone automatic validity checks.
You can find out more information about each location (monitoring site) by clicking on its dot on the map. Once selected you can find out further information by clicking the 'Site Details' link above.

Click the 'Statistics' link above to see results from this site compared to national limit values. Past pollution episodes can be seen by clicking on the 'Episodes' link.

Alternatively, click on the button below to see a graph of this week's pollution levels.
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