WATER RESOURCES
Water Planning
Check this page for updates from the Board of Water Supply regarding key water planning initiatives and for archival access to related documents posted prior to January 1, 2026.
-
Watershed Management Plan
BWS is developing district-wide watershed management plans, which will be used to meet the requirements of preparing a county water use and development plan under the State of Hawaiʻi Water Code and City and County of Honolulu ordinance.
-
Water Master Plan
Learn more about our Water Master Plan, a comprehensive 30-year program that evaluates Oʻahu's municipal water system, identifies necessary improvements and balances needs and costs to provide safe, dependable and affordable water, as well as other long-term BWS plans.
Updated: 01/01/2026