Water supply and sanitation in London - wikipedia Water supply and sanitation in London Water supply and sanitation in London is provided by a number of private companies. The regional water strategy for London is produced by the Greater London Authority. Much of the water supply and sewerage system was constructed during the Victorian era. Greater London is located within the Thames River Basin District. Water supply Water supply by population Thames ( 76 % ) Affinity ( 14 % ) Essex and Suffolk ( 6.6 % ) SES ( 3.4 % ) London has well developed water supply infrastructure. Most drinking water consumed in London comes from the River Thames and the River Lea. Approximately 70 % of all water supplied to London is taken from the Thames upstream of Teddington Weir. Greater London is currently supplied by four companies : Thames Water ( 76 % of population ), Affinity Water ( 14 % ), Essex and Suffolk Water ( 6.6 % ) and SES Water ( 3.4 % ). Sewerage All of Greater London is within the Thames River Basin District. The London sewerage system is operated by Thames Water and serves almost all of London, except for a small area where Anglian Water provides sewerage services. References Jump up ^ http://www.london.gov.uk/priorities/environment/vision-strategy/water Jump up ^ http://www.london.gov.uk/sites/default/files/water-strategy-oct11.pdf Jump up ^ http://www.london.gov.uk/mqt/public/question.do?id=15326 Jump up ^ http://www.environment-agency.gov.uk/static/documents/Research/SE_Thames_RBD_map.pdf Water supply and sanitation in London Companies Affinity Water Anglian Water Essex and Suffolk Water Sutton and East Surrey Water Thames Water Major infrastructure Supply infrastructure Sewerage system Northern Outfall Sewer Southern Outfall Sewer Retrieved from `` https://en.wikipedia.org/w/index.php?title=Water_supply_and_sanitation_in_London&oldid=832561105 '' Categories : Water supply and sanitation in England Water supply and sanitation in London Water in London Talk About Wikipedia Add links This page was last edited on 26 March 2018, at 18 : 49 ( UTC ). Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: where does tap water in london come from
Answer: River Thames