A Water Safety Plan (WSP) is essential to ensuring safe drinking water on board yachts and ships. Introduced by the World Health Organization (WHO) and mandated by the Maritime Labour Convention (MLC 2006) , the WSP adopts a systematic approach to identifying, assessing, and controlling water-related risks, from source to point of consumption.
Water on board comes from shore supplies or from desalination plants, but every stage—loading, storage, treatment, and distribution—can present microbiological, chemical, or physical hazards. Factors such as biofilm in pipes , contamination during bunkering , water stagnation , or system malfunctions can compromise the health of crew and guests.
The WSP is based on three fundamental pillars:
- System assessment (complete description of the water system);
- Operational monitoring (control of parameters such as pH, residual chlorine, temperature);
- Management and communication (data recording, corrective actions, crew training).
Benefits include increased health safety , compliance with international regulations , reduced use of bottled water, and demonstration of diligence in the event of inspections. The plan also includes procedures for managing incidents, such as shock disinfection or filter replacement.
With a well-structured WSP, yacht owners can ensure clean, safe, and high-quality water, protecting the health and well-being of everyone on board. Prevention, not cure, is the key to safe navigation.
