Which statement is true regarding the supervision of community and non-transient non-community PWS?

All community and non-transient non-community public water systems (PWS) must indeed be under the supervision of a licensed water works operator. This requirement is in place to ensure that water systems maintain compliance with health and safety standards, providing safe drinking water to the public. Licensed operators possess the training and knowledge necessary to manage water treatment processes, distribution systems, and regulatory compliance effectively.

This supervision is critical because these systems can vary in size and complexity, and both community and non-transient non-community systems serve a consistent population, meaning the consequences of any water quality issues can directly affect public health. By requiring licensed operators, the regulations aim to safeguard public health and ensure that water utilities are managed competently.

In contrast, the other choices present misconceptions about licensing requirements. The idea that only systems with surface water sources need supervision overlooks the fact that groundwater systems also require proper management and oversight. Suggesting that none require licensed operators ignores established regulations that mandate licensed supervision across the board. Lastly, the assertion that only large systems need licensed supervision fails to recognize that even smaller PWS are subject to licensing requirements to ensure consistent safety and effectiveness in water management.