What type of breach is considered a Class 1 water supply incident?

A water main break that affects fire protection capabilities is classified as a Class 1 water supply incident due to the significant implications it has on firefighting operations. When a water main breaks, it can lead to a substantial loss of water pressure or volume, which can directly hinder the ability of firefighters to effectively combat a fire. The classification reflects the severity of the incident, emphasizing that the disruption of the water supply system poses a serious risk not only to immediate firefighting efforts but also to overall community safety. Such incidents necessitate quick and effective response measures to restore water supply and ensure adequate pressure for fighting fires.

In contrast, a small leak that causes no significant damage, a minor plumbing issue, and an underground storage tank leak do not directly impair the capability to provide fire protection and are therefore not categorized as Class 1 incidents. Each of these scenarios, while they may warrant attention, does not present the same level of critical impact on public safety and firefighting resources as a water main break that compromises fire protection capabilities.