Regulations and other information
DEQ regulates graywater reuse and disposal systems under Oregon Administrative Rules Chapter 340, Division 53, which establishes a policy that encourages graywater reuse while protecting public health safety and welfare, public water supplies and waters of the state. These rules are based on recommendations from DEQ's Graywater Advisory Committee.
The rules define three types of graywater (Type 1, Type 2 and Type 3), based on level of treatment, and identify specific beneficial purposes, such as landscape irrigation, for each type of graywater. The rules also establish treatment and monitoring requirements, setbacks, access and exposure controls, and site management practices necessary to protect public health and the environment.