A more thorough explanation:

A water district is a geographical subdivision created by a state or local government entity to provide the public with a water supply. It is a type of special district, which is a political subdivision that is created to bypass normal borrowing limitations, to insulate certain activities from traditional political influence, to allocate functions to entities reflecting particular expertise, and to provide a single service within a specified area.

For example, a city may create a water district to manage the water supply for its residents. The water district would be responsible for collecting water from a source, treating it to make it safe for consumption, and distributing it to homes and businesses within the district.

Another example is a rural area that relies on wells for its water supply. The residents may create a water district to manage the wells and ensure that the water is safe for consumption.

Water districts are important because they ensure that the public has access to safe and reliable water. They also help to manage and conserve water resources, which is important for the environment and future generations.