Written question asked by Sarah Olney (Liberal Democrat) on Tuesday, 1 September 2026, in the House of Commons. It was due for an answer on Monday, 7 September 2026 (named day). It was answered by Emma Hardy (Labour) on Tuesday, 8 September 2026 on behalf of the Department for Environment, Food and Rural Affairs.

Water Abstraction: Teddington

Question: To ask the Secretary of State for Environment, Food and Rural Affairs, whether she has made an assessment of (a) the daily quantity of raw water that the Teddington Direct River Abstraction Scheme would supply to reservoirs for onward transport to water treatment works, and (b) what the percentage of the total daily raw water demand required by London’s water treatment plants would be supplied by the Teddington Direct River Abstraction Scheme.

Answer: The proposed Teddington Direct River Abstraction (TDRA) supplies 67Ml/d during droughts. London’s water use is just under 2000Ml/d. Therefore, TDRA contributes just over 3% of Thames Water’s total demand in London and is needed to provide drought resilience to supply.

Secondary information

Type: Written question
Reference: 26078
Session: 2026-27
Related items: Water Abstraction: Teddington
Monday, 12 October 2026
Written questions
House of Commons
Subjects: Greater London Water abstraction Reservoirs Water treatment Teddington
Contains statistics: Yes
Link: View this Written question on www.parliament.uk