What is the term used for ground storage at a surface water treatment plant?

The term "clear well" is used for the ground storage at a surface water treatment plant because it specifically refers to a storage facility designed to hold potable water after the treatment process, allowing for additional disinfection before the water is pumped into the distribution system. Clear wells serve several critical functions, including providing a buffer against fluctuations in water demand and allowing for adequate chlorine contact time, which is essential for ensuring that the water is safe for consumption.

In contrast, terms like "tank reservoir," "holding basin," and "water vault" may relate to water storage in various contexts but do not accurately reflect the specific function and design characteristics of a clear well in water treatment. A "tank reservoir" can imply a larger capacity and is typically not used exclusively for treated water; a "holding basin" suggests temporary storage without the emphasis on disinfection processes; while "water vault" is less commonly used and may not specifically refer to treated water storage. Hence, "clear well" is the most precise term for this application within surface water treatment facilities.