HC Deb 22 February 1980 vol 979 cc575-6W
Mr. Ernie Ross

asked the Secretary of State for Scotland what percentage of sewage and what percentage of industrial effluents discharged into the River Tay do not conform to the Royal Commission standard.

Mr. Rifkind

This information is not held centrally. The hon. Member may wish to ask the appropriate authority, the River Tay purification board.