Safe use of wastewater, greywater and excreta
In 2006, WHO published a third edition of its Guidelines for the safe use of wastewater, excreta and greywater in agriculture and aquaculture. In four volumes, these Guidelines propose a flexible approach of risk assessment and risk management linked to health-based targets that can be established at a level that is realistic under local conditions. The approach is to be backed-up by strict monitoring measures.
The Guidelines are presented in four separate volumes in English and French:

Volume 1 of the Guidelines presents policy issues and regulatory measures distilled from the technical detail found in volumes 2, 3 and 4. Those faced...

Volume 2 of the Guidelines explains requirements to promote safe use concepts and practices, including health-based targets and minimum procedures. It...

Volume 3 of the Guidelines informs readers on the assessment of microbial hazards and toxic chemicals and the management of the associated risks when using...

Volume 4 of the Guidelines for the safe use of wastewater, excreta and greywater provides information on the assessment and management of risks associated...
Using human waste safely for livelihoods, food production and health
First information kit
For national programme managers and engineers
For the research community
For policy makers and planners
For WHO and FAO country offices
For community workers and agricultural extension officers
Second information kit
Guidance documents related to the Guidelines
From policy to action