Wastewater Treatment Plant

Reclaimed Water

Reclaimed Water

Reclaimed water is an important component of wise water management. It is an element of the state's strategy to extend potable water reserves. Reclaimed water is derived from domestic wastewater and small amounts of industrial process water or stormwater.

The process of reclaiming water, sometimes called water recycling or water reuse, involves a highly engineered, multi-step treatment process that speeds up nature's restoration of water quality. The process provides a high-level of disinfection and reliability to assure that only water meeting stringent requirements leaves the treatment facility.

Frequently Asked Questions about The Reclaimed Water Rule

Standards for the Use of Reclaimed Water

The Departments of Health and Ecology – with assistance of a Water Reuse Advisory Committee, interested stakeholders, and a consultant team of nationally recognized water reuse experts – developed standards for most applications of reclaimed water.

The standards emphasize public health protection and provide design, treatment and use area criteria for the following reclaimed water categories: general requirements (e.g., land application, impoundments, commercial and industrial uses), use in both natural and constructed wetlands, and groundwater recharge (direct and surface percolation). The Washington State standards are some of the most comprehensive and technically sound reclaimed water standards in the United States.

The file below contains the latest version of the Water Reclamation and Reuse Standards developed by the Departments of Health and Ecology.

Water Reclamation and Reuse Standards



Reclaimed Water Rule Making Overview

Reclaimed Water Facilities map and information

Subscribe to the Reclaimed Water ListServ

2009 Report to the Legislature Water Rights Impairment Standards for Reclaimed Water


Water Smart, Not Water Short - 5 Ways to Secure Water for Washington's Future