The Water Supply (Water Quality) Regulations 1989 as amended by the Water Supply (Water Quality) (Amendment) Regulations 1991 : Regulations 25 and 26 : list of substances, products and processes approved under Regulations 25 and 26 for use in connection with the supply of water for drinking, washing, cooking or food production purposes /
Great Britain.Drinking Water Inspectorate.
Great Britain.Department of the Environment.
Great Britain.Welsh Office.
[London] : Department of the Environment ; [Cardiff] : Welsh Office,
1991.
Cover title.
Great Britain.
Water quality
Water quality