HC Deb 06 May 1987 vol 115 c467W
Dr. David Clark

asked the Secretary of State for the Environment if he will list by water supply district those parts of the United Kingdom in which drinking water supplied through the mains system or available through private supplies is below the pH range 6.5–8.5.

Mr. Waldgrave

I am not aware of any public water supplies in England where pH is below 6.5.