Manual for step-by-step risk management for safely managed sanitation systems. 2nd edition. This Sanitation safety planning (SSP) manual provides practical, step-by-step guidance to assist in the implementation of the 2018 World Health Organization (WHO) Guidelines on sanitation and health and the 2006 WHO Guidelines for safe use of wastewater, excreta and greywater in agriculture and aquaculture. The approach and tools should be applied to all sanitary systems to ensure that they are managed to meet health objectives. The SSP manual is targeted at a variety of users at different levels including; health authorities and regulators, local authorities, sanitation utility managers, sanitation enterprises and farmers, community-based organizations, farmers associations and nongovernmental organizations.