Which type of water system does not meet the criteria for a public water system?

A Non-Public Water System is characterized as a system that does not provide water to the public; instead, it serves a specific household or group of individuals without being regulated under public water system rules. This distinction is significant because public water systems must adhere to certain federal and state regulations to ensure safety and quality in the water supply, as defined by the Safe Drinking Water Act.

In contrast, the other types of water systems mentioned, such as Community Water Systems, Transient Non-Community Systems, and Non-Community Water Systems, are all recognized as public water systems because they supply water to multiple users beyond a single household. Therefore, they are subject to regulatory requirements aimed at ensuring the safety of their water supply for public consumption.

Understanding the differences between these types of water systems is crucial for complying with environmental health regulations and ensuring the protection of public health.