HC Deb 11 December 1972 vol 848 c66W
Mr. Elystan Morgan

asked the Secretary of State for Wales what is the total gallonage of water which passes from Wales daily for the use of water authorities in England.

Mr. Peter Thomas

During the year ended 31st December 1971, English water undertakings obtained an average 617.4 megalitres per day from Welsh sources: 4.546 megalitres=1 million gallons.