This paper discusses the environmental quality objective (EQO) approach to water quality management and defines the terms EQO and environmental quality standard (EQS). The proposed list of water uses is presented. The derivation of EQSs for each use is discussed and the EQS values proposed for six list II substances are reported. The relevence of these values, and problems associated with the control of individual substances, are discussed in relation to current practice.
Application of the European Communities Directive on Dangerous Substances to List II Substances in the U.K.
G Mance, A R O'Donnell; Application of the European Communities Directive on Dangerous Substances to List II Substances in the U.K.. Water Sci Technol 1 May 1984; 16 (5-7): 159–169. doi: https://doi.org/10.2166/wst.1984.0129
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