Mr. Teddy Talyorasked the Secretary of State for the Environment if he considers that the policy of reducing nitrate levels in public water supplies by biological denitrification involves any significant health hazards to the general public; and if he will make a statement.
§ Mr. WaldegraveBiological denitrification is one of the methods which is being considered for reducing the level of nitrates in drinking water supplies. Experience with a full-scale trial plant, in the Anglian water authority area, indicates that the process can be readily controlled to avoid any health risks.