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International Guidelines relating to use of recycled water
World Health Organisation (WHO) Guidelines for the safe use of wastewater, excreta and greywater (3rd Edition)
The third edition of the World Health Organisation Guidelines for the safe use of wastewater, excreta and greywater has been extensively updated to take account of new scientific evidence and contemporary approaches to risk management. The revised Guidelines reflect a strong focus on disease prevention and public health principles.
This new edition responds to a growing demand from WHO Member States for guidance on the safe use of wastewater, excreta and greywater in agriculture and aquaculture. Its target audience includes environmental and public health scientists, researchers, engineers, policy-makers and those responsible for developing standards and regulations.
The Guidelines are presented in four separate volumes:
International guidelines for water recycling: microbiological considerations - a research paper response to the WHO guidelines, published in Water Science and Technology: Water Supply IWA Publishing (pdf) 2003.
Food and Agriculture Organisation (FAO) Irrigation water quality and wastewater re-use
FAO Guidelines on water quality for agriculture has specific section on irrigation water quality and wastewater reuse.
Published USA codes are available on the internet for statutes, regulations and programs respectively:
Drinking water quality
United Nations Guidelines for Drinking Water Quality Volume 1, (3rd Edition)
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