Transcription of Chapter 2* - Water Quality Requirements
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Chapter 2* - Water Quality Requirements
Chapter 2* - Water Quality Requirements * This Chapter was prepared by Ute S. Enderlein, Rainer E. Enderlein and W. Peter Williams Introduction Control of Water pollution has reached primary importance in developed and a number of developing countries. The prevention of pollution at source, the precautionary principle and the prior licensing of wastewater discharges by competent authorities have become key elements of successful policies for preventing, controlling and reducing inputs of hazardous substances, nutrients and other Water pollutants from point sources into aquatic ecosystems (see Chapter 1).
definitions of criteria for water use among riparian countries of the river. A set of national water quality criteria for drinking-water use as well as criteria for fish and aquatic life, and irrigation have been established (ESCAP, 1990). Criteria for aquatic life include: pH (range 6.5-8), dissolved oxygen (> 2 mg l-1), NH 4-N (< 1 mg l
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