The Committee's assignment was to establish the scientific basis for formulating a national action program for biological diversity and nature conservation in Denmark. The focus of this value transfer guide is the Stated Preference methods (CV and CE) and the Revealed Preference methods (TC and HP). The study comprises valuation of the effects on both drinking water quality and the quality of surface water recipients, expressed by the quality of the living conditions for wild animals, fish and plants in lakes and waterways.