What is the first step in evaluating the safety of a potential water system?

To evaluate the safety of a potential water system, one must begin with a detailed sanitary survey of the water supply. This initial survey is crucial as it provides a comprehensive assessment of the source, treatment, distribution, and overall integrity of the water system. A thorough sanitary survey identifies potential contamination risks, the condition of the infrastructure, and the effectiveness of treatment processes.

Understanding the current state of the water supply through a sanitary survey helps in identifying weaknesses and areas that require attention to ensure that safe drinking water is provided. This foundational step informs subsequent evaluations, including sampling frequency and chemical examinations, but it is the survey that outlines the big picture of water safety first.