Ewa Watershed Management Plan

The Board of Water Supply (BWS) and Department of Planning and Permitting (DPP), City and County of Honolulu, have begun the development of the Ewa Watershed Management Plan (EWMP), which will be used to meet the requirement of the State Water Code and City Ordinance to prepare a county water use and development plan. Ewa is one of eight district plans that together will comprise the Oahu Water Management Plan.

Ewa Watershed Management Plan - Public Review Draft

  • Ewa Watershed Management Plan Public Review Draft
  • Hard copies of the EWP Public Review Draft may be found at:
    • 'Ewa Beach Public and School Library
      91-950 North Road
      'Ewa Beach, HI 96706
    • Kapolei Public Library
      1030 Manawai Street
      Kapolei, HI 96707
    • Hawaii State Library
      478 S. King Street
      Honolulu, HI 96813


To formulate an environmentally holistic, community-based, and economically viable watershed management plan that will provide a balance between:

  1. the preservation and restoration of Oahu's watersheds, and
  2. sustainable ground water and surface water use and development to serve present users and future generations.
ewa watershed management plan 2010 oahu map
ewa watershed management plan process

District Size

33,677 acres

District Population

94,504 people (2010 Census)

ewa watershed illustration

Community Meetings

Community Meeting #1 - Tuesday, May 21, 2013

Community Meeting #2 - Friday, November 14, 2014

Community Meeting #3 - Tuesday, September 12, 2017

For More Information

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Townscape, Inc.

Contact: Bruce Tsuchida
Phone: (808) 536-6999
Email: bruce@townscapeinc.com

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Honolulu Board of Water Supply

Contact: Barry Usagawa
Phone: (808) 748-5900
Email: busagawa@hbws.org