To ask the Secretary of State for Wales if he will estimate what percentage of the volume of sewage discharged into the Welsh coastal waters has received (a) primary treatment only and (b) primary and secondary treatment.
I understand from information provided by Dwr Cymru that, based on population served, approximately 7 per cent. of the sewage discharged into Welsh coastal waters, including estuarial waters, receives primary treatment only and 22 per cent. receives primary and secondary treatment.
To ask the Secretary of State for Wales if he will place in the Library a copy of the report that his Department funded jointly with the Welsh water authority concerning viruses in sea and fresh water by Dr. J. M. Tyler.
Yes. The results of the research have been broadcast in various seminars and symposia and in a number of publications.
To ask the Secretary of State for Wales if he will publish a list of actual pollution incidents in Wales during the last three years whereby industrial chemicals were discharged illegally into surface waters.
This is a matter for the National Rivers Authority.