Honolulu Board of Water Supply

What We Do

The Honolulu Board of Water Supply (BWS) provides safe, dependable and affordable water now and into the future for the island of Oahu, Hawaiʻi. We are working hard to preserve and protect our most essential resource – our water.

Who We Are

A semi-autonomous agency of the City and County of Honolulu, BWS manages Oʻahu municipal water resources and distribution system. As the largest water utility in the state, we serve approximately one million Oʻahu customers.