The Authority's mission is:
- To ensure that the entire population of the Cayman Islands has access to a pure, wholesome and affordable supply of potable water; and to regulate other entities that are licensed by the Government to provide water supplies.
- To protect and develop groundwater resources for the benefit of present and future populations of these islands.
- To provide for the collection, treatment and disposal of sewage within these islands in a manner that is safe, efficient and affordable.
- To operate in such a manner as to be financially self-sufficient, while contributing to the economy of these islands and achieving a reasonable and acceptable return on capital investments.