Water in the State of Hawaii is recycled for a range of non-potable applications. In 2016, the Hawaii Department of Health revised its guidelines for water reuse, which include technical requirements and application processes for various qualities of recycled water, requirements to construct or modify a wastewater reclamation facility, and best practices for reuse of graywater.
Regulations and Policies
Reuse Guidelines- Volume 1: Recycled Water Facilities: Volume 1 addresses technical requirements that must be met for the various qualities of recycled water as well as requirements to construct or modify a wastewater reclamation facility (WWRF).
Reuse Guidelines- Volume 2: Recycled Water Projects: Volume 2 covers the application process to use recycled water for purposes such as irrigation, dust control, cleaning, and fire-fighting and establishes best management practices that apply to the end user.
Guidelines for the Reuse of Graywater: These guidelines detail the acceptable uses of graywater, including discharge from showers, bathtubs, hand-washing lavatories, and washing machines, as well as considerations for design and system maintenance.
Hawaii Department of Health, Recycled Water Program: The Department of Health administers the recycled water program.