Volume 2 of the Guidelines explains requirements to promote safe use concepts and practices, including health-based targets and minimum procedures. It also covers a substantive revision of approaches to ensuring the microbial safety of wastewater used in agriculture. It distinguishes three vulnerable groups: agricultural workers, members of communities where wastewater-fed agriculture is practiced and consumers. It introduces health impact assessment of new wastewater projects.
WHO (2006). WHO Guidelines for the Safe Use of Wastewater, Excreta and Greywater (Volume II: Wastewater Use in Agriculture) World Health Organization (WHO), Geneva, Switzerland and UNEP, FAO
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