How long must a public water supply serve people to be considered valid?

To determine how long a public water supply must serve people to be considered valid, the key criterion is consistency and reliability of service. The definition of a public water supply typically requires that it provide continuous access to potable water for a significant portion of the year to ensure public health and safety.

Serving for at least 60 days per year allows the system to establish a pattern of reliability. This duration is sufficient to demonstrate that the water supply can meet the needs of the community and supports any necessary monitoring and compliance with health regulations. A temporary or seasonal service, such as only during summer months, would not qualify as a reliable public water supply because it doesn't meet the needs of residents who may require access year-round.

A service duration of at least 30 days per year is also inadequate, as it does not ensure enough time for the system to demonstrate consistent operational capability and health safety standards. Therefore, the requirement of at least 60 days is a balance that supports both the needs of the community and the operational standards of public water systems.