(WSP) Manual by WHO-IWA published in 2009 are as follows: i)
The source(s) of water including the runoff and/or recharge processes, and if applicable, alternative sources in case of incident ii) Identify all hazards and hazardous events in the water supply being, or becoming contaminated, compromised or interrupted iii) Flooding, run-off, sufficiency; and iv) Hazard, physical, failure of pumps.
In order to minimise the incidents stated above from recurring, an effective means of consistently ensuring the safety of a potable water supply system via comprehensive risk assessment and risk management approach from catchment to consumers is required. The approach is defined as a Water Safety Plan. A typical water supply system consists of four basic elements is as shown in figure 15:
Figure 15: Basic Elements of WSP (Catchment, Treatment, Distribution, Consumer)
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Study on the Current Issues and Needs for Water Supply and Wastewater Management in Malaysia