where does the tap water in london come from
London water supply infrastructure Most of London's water comes from non-tidal parts of the Thames and Lea, with the remainder being abstracted from underground sources.[22]
Drought in the United Kingdom A significant hydrological drought occurred in the United Kingdom between 1995 and 1998, when the warm, dry summers were followed by dry, cool winters. This meant that over the three years, the lack of winter precipitation failed to counteract the dry summers, so slowly the water table fell, and reservoir water levels began to fall.[6] Water levels were only replenished after some exceptionally wet years from 1999 to 2002. Similar conditions were felt between 2003 and 2006, with only the record breaking rainfall of 2007 and 2008 replenishing the water levels.[7]