Which of the following is an important component of a sanitary survey for water systems?

The evaluation of watershed sources is indeed a critical component of a sanitary survey for water systems because it involves examining the area from which a water supply originates. This assessment helps determine the quality and safety of the water before it even enters the distribution system. By understanding the watershed, including land use practices, potential sources of contamination, and natural filtration mechanisms, environmental health specialists can identify risks that may affect the water supply.

This aspect of the survey is essential because it addresses the preventative measures necessary to protect the water source from contamination, including the management of surrounding land use, wildlife, and human activities that might pose a risk. A thorough evaluation of watershed sources helps ensure that the entire water system maintains high-quality water for public consumption.