The Northern Outfall Sewer (NOS) is a major

gravity sewer A gravity sewer is a conduit utilizing the energy resulting from a difference in elevation to remove unwanted water. The term ''sewer'' implies removal of sewage or surface runoff rather than water intended for use;''Design and Construction of Sa ...

which runs from Wick Lane in Hackney to the Beckton Sewage Treatment Works in east London. Most of it was designed by

Joseph Bazalgette Sir Joseph William Bazalgette (; 28 March 1819 – 15 March 1891) was an English civil engineering, civil engineer. As Chief Engineer of London's Metropolitan Board of Works, his major achievement was the creation of the London Main Drainage, t ...

, as a result of an outbreak of

cholera Cholera () is an infection of the small intestine by some Strain (biology), strains of the Bacteria, bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea last ...

in 1853 and the "

Great Stink The Great Stink was an event in Central London during July and August 1858 in which the hot weather exacerbated the smell of untreated human waste and industrial effluent that was present on the banks of the River Thames. The problem had been ...

" of 1858. Prior to the work, drains in central London were built primarily to cope with rain water, but the growing use of flush toilets frequently meant that they became overloaded, causing sewage and industrial effluent to flow into the

River Thames The River Thames ( ), known alternatively in parts as the The Isis, River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the Longest rivers of the United Kingdom, s ...

. Bazalgette's

London sewerage system The London sewer system is part of the water infrastructure serving London, England. The modern system was developed during the late 19th century, and as London has grown the system has been expanded. It is currently owned and operated by Thame ...

project included the construction of intercepting sewers north and south of the Thames. The Southern Outfall Sewer network diverts flows away from the Thames south of the river. In total, five interceptor sewers were constructed north of the Thames. Three were built by Bazalgette, and two were added 30 years later: *The northernmost (Northern High Level Sewer) begins on

Hampstead Hampstead () is an area in London, England, which lies northwest of Charing Cross, located mainly in the London Borough of Camden, with a small part in the London Borough of Barnet. It borders Highgate and Golders Green to the north, Belsiz ...

Hill and is routed past

Kentish Town Kentish Town is an area of northwest London, England, in the London Borough of Camden, immediately north of Camden Town, close to Hampstead Heath. Kentish Town likely derives its name from Ken-ditch or Caen-ditch, meaning the "bed of a waterw ...

and

Stoke Newington Stoke Newington is an area in the northwest part of the London Borough of Hackney, England. The area is northeast of Charing Cross. The Manor of Stoke Newington gave its name to Stoke Newington (parish), Stoke Newington, the ancient parish. S ...

and under Victoria Park to the start of the Northern Outfall Sewer at Wick Lane. *Two middle level sewers serve parts of central London and also join the Northern Outfall Sewer at Wick Lane: **One begins close to Kilburn and runs along Edgware Road,

Euston Road Euston Road is a road in Central London that runs from Marylebone Road to Kings Cross, London, King's Cross. The route is part of the London Inner Ring Road and forms part of the London congestion charge zone boundary. It is named after Euston ...

and past King's Cross, through

Islington Islington ( ) is an inner-city area of north London, England, within the wider London Borough of Islington. It is a mainly residential district of Inner London, extending from Islington's #Islington High Street, High Street to Highbury Fields ...

to Wick Lane. **The other runs from

Kensal Green Kensal Green, also known as Kensal Rise, is an area in north-west London, and along with Kensal Town, it forms part of the northern section of North Kensington, London, North Kensington. It lies north of the canal in the London Borough of Brent ...

, under Bayswater and along

Oxford Street Oxford Street is a major road in the City of Westminster in the West End of London, running between Marble Arch and Tottenham Court Road via Oxford Circus. It marks the notional boundary between the areas of Fitzrovia and Marylebone to t ...

, then via

Clerkenwell Clerkenwell ( ) is an area of central London, England. Clerkenwell was an Civil Parish#Ancient parishes, ancient parish from the medieval period onwards, and now forms the south-western part of the London Borough of Islington. The St James's C ...

and

Bethnal Green Bethnal Green is an area in London, England, and is located in the London Borough of Tower Hamlets. It is in east London and part of the East End of London, East End. The area emerged from the small settlement which developed around the common la ...

to Wick Lane. *Two low-level sewers stretch from west London: **One starts from near Ravenscourt Park, passes under

Hammersmith Hammersmith is a district of West London, England, southwest of Charing Cross. It is the administrative centre of the London Borough of Hammersmith and Fulham, and identified in the London Plan as one of 35 major centres in Greater London. It ...

and

Kensington Kensington is an area of London in the Royal Borough of Kensington and Chelsea, around west of Central London. The district's commercial heart is Kensington High Street, running on an east–west axis. The north-east is taken up by Kensingt ...

Piccadilly Piccadilly () is a road in the City of Westminster, London, England, to the south of Mayfair, between Hyde Park Corner in the west and Piccadilly Circus in the east. It is part of the A4 road (England), A4 road that connects central London to ...

, the Strand,

Aldwych Aldwych (pronounced ) is a street and the name of the List of areas of London, area immediately surrounding it, in the City of Westminster, part of Greater London, and is part of the West End of London, West End West End Theatre, Theatreland. T ...

, the City and

Aldgate Aldgate () was a gate in the former defensive wall around the City of London. The gate gave its name to ''Aldgate High Street'', the first stretch of the A11 road, that takes that name as it passes through the ancient, extramural Portsoken ...

to Abbey Mills Sewage Pumping Station. **The second begins in Hammersmith, crosses under

Fulham Fulham () is an area of the London Borough of Hammersmith and Fulham in West London, England, southwest of Charing Cross. It lies in a loop on the north bank of the River Thames, bordering Hammersmith, Kensington and Chelsea, London, Chelsea ...

and then runs along the King's Road and Cheyne Walk from where it becomes an integral part of the

Thames Embankment The Thames Embankment was built as part of the London Main Drainage (1859-1875) by the Metropolitan Board of Works, a pioneering Victorian civil engineering project which housed intercept sewers, roads and underground railways and embanked the ...

. Western Sewage Pumping Station near Chelsea Bridge helps maintain the necessary gravity flow, taking sewage on along

Millbank Millbank is an area of central London in the City of Westminster. Millbank is located by the River Thames, east of Pimlico and south of Westminster. Millbank is known as the location of major government offices, Burberry headquarters, the Mill ...

, the

Victoria Embankment Victoria Embankment is part of the Thames Embankment (the other section is the Chelsea Embankment), a road and river-walk along the north bank of the River Thames in London, England. Built in the 1860s, it runs from the Palace of Westminster to ...

and

Tower Hill Tower Hill is the area surrounding the Tower of London in the London Borough of Tower Hamlets. It is infamous for the public execution of high status prisoners from the late 14th to the mid 18th century. The execution site on the higher gro ...

, then north-east under

Whitechapel Whitechapel () is an area in London, England, and is located in the London Borough of Tower Hamlets. It is in east London and part of the East End of London, East End. It is the location of Tower Hamlets Town Hall and therefore the borough tow ...

Stepney Stepney is an area in the London Borough of Tower Hamlets in the East End of London. Stepney is no longer officially defined, and is usually used to refer to a relatively small area. However, for much of its history the place name was applied to ...

and Bow to Abbey Mills.Trench, R. and Hillman, E. (1984) ''London under London: A Subterranean Guide'' (London: John Murray), pp. 72–75. The flows from the two low-level sewers are raised by some into the Northern Outfall Sewer at Abbey Mills Pumping Station, to join the flows from the High and Middle Level sewers. The remaining sections of the NOS carry the sewage from Abbey Mills to the treatment plant at Beckton. The creation of the NOS was a massive undertaking, and involved the construction of huge embankments and several bridges. Today, the eastern end of the Northern Outfall Sewer, running some from Wick Lane to Beckton, has been landscaped to form a public footpath/cycleway called The Greenway, with access points along its length.

References

External links

A website showing some of the pipework
{{coord, 51, 31, 44, N, 0, 0, 52, E, display=title, scale:20000 London water infrastructure Buildings and structures in the London Borough of Newham Subterranean London Thames Water

See also

References

External links