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Central Oahu Watershed Management Plan

The Honolulu Board of Water Supply (BWS) has begun the development of the district-wide Central Oahu Watershed Management Plan (COWMP). This will be one of eight district water management plans that will comprise the Oahu Water Management Plan.


The overall goal of the COWMP is to formulate an environmentally holistic, community-based, and economically viable watershed management plan that will provide a balance between:

  1. the preservation and management of Oahu's watersheds, and
  2. sustainable ground water and surface water use and development to serve present users and future generations.
oahu development plan areas

central oahu watershed management plan map

District Size

70,921 acres

  • Agricultural: 30,359 acres
  • Conservation: 25,645 acres
  • Urban: 14,917 acres

District Population

168,539 people (2010 Census Data)

Community Meetings

Meeting #3 - June 27, 2019

Meeting #2 - February 1, 2018

Meeting #1 - December 11, 2014

For More Information

brown caldwell logo Brown and Caldwell
Contact: Dean Nakano
Phone: (808) 203-2673
Email: dnakano@brwncald.com

Contact: Susan Mukai
Phone: (808) 203-2667
Email: smukai@brwncald.com
bws logo Board of Water Supply
Contact: Barry Usagawa
Phone: (808) 748-5900
Email: busagawa@hbws.org