§ Mr. Chris Smithasked the Secretary of State for the Environment if he will list those water supply zones in which the maximum admissible concentration for aluminium of 0.2 milligrams per litre is exceeded on the basis of a three-monthly average.
§ Mr. John PattenI refer the hon. Member to the reply given by my hon. Friend the Member for Sutton and Cheam (Mr. Macfarlane) on 10 June 1985, at columns319–20.
§ Mr. Chris Smithasked the Secretary of State for the Environment if he will give details of the geographical areas covered by those water supplies in respect of which applications for derogation from the maximum admissible concentrations have been made by the Thames water authority and the Welsh water authority; and if he will indicate which of these applications for derogations have been refused.
§ Mr. John PattenApplications for derogation have been made by Thames water authority for the following water supply zones
Putney-Fulham, Maiden Lane-Kentish Town, Streatham Hill, High Beech, Woodford-Canning Town, Chessington, and Finsbury Park-Mile End in London for the nitrite parameter; Banbury and Abingdon in Oxfordshire for the parameter which includes chlorinated trihalomethanes.None of these applications has been refused as there is no public health risk.That part of the question relating to the Welsh water authority is a matter for my right hon. Friend the Secretary of State for Wales.