Commission on Water Resource Management

The Commission’s efforts to develop instream flow standards on the Island of O‘ahu are captured here. O‘ahu is divided into six regions: Ko‘olau Loa, Ko‘olau Poko, Honolulu, ‘Ewa, Wai‘anae, and Waialua. Each region is further divided into individual surface water hydrologic units. Each unit has it own unique, 4-digit surface water hydrologic unit (SWHU) code. The tables are organized by regions (click on each drop-down below) and SWHU Code, and contain links to the resource pages that provide further details and information on the development of instream flow standards for each unit. Some instream flow standards were developed administratively by the Commission and its staff, while others were arrived at by way of a contested case hearing.

NOTE: This page is still under development and individual hydrologic unit data is still being compiled.