Oregon Administrative Rules
Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY
Division 53 - GRAYWATER REUSE AND DISPOSAL SYSTEMS
Section 340-053-0100 - Graywater Reuse and Disposal System Design and Construction Standards
Current through Register Vol. 63, No. 3, March 1, 2024
(1) Graywater collection system. A person may not install a graywater collection system unless it complies with the following requirements:
(2) Treatment system. In order to meet the rules of this division for Type 2 and Type 3 graywater, a person may install a graywater treatment system that meets one of the following requirements:
(3) Diversion valve. A person may not install a graywater reuse and disposal system unless the system has a graywater diversion valve that allows graywater flow to be directed between beneficial reuse and either an approved sewerage system, or a functioning onsite wastewater treatment system or holding tank system approved under OAR 340-071. The graywater diversion valve must be readily accessible and clearly labelled. The diversion valve must be constructed of material that is durable, corrosion resistant, watertight and designed to accommodate the inlet and outlet pipes in a secure and watertight manner.
(4) Cross connection control. A person may not install a direct-connection between a potable water supply system and graywater reuse and disposal system. The department may authorize in writing the discharge of potable water to a graywater reuse and disposal system that uses an air gap separation or other back flow prevention device allowed under Oregon Plumbing Specialty Code and has been permitted by the community water system having jurisdiction.
(5) Storage and surge tanks. A person may install a graywater reuse and disposal system storage or surge tank only if it is:
(6) Distribution system. A person may not install a graywater reuse and disposal system unless the distribution system, excluding irrigation components, satisfies the following requirements:
(7) Irrigation system. A person installing a graywater irrigation system must ensure the irrigation components are marked or labeled as containing nonpotable water and meet the irrigation specifications in the system design plan.
(8) Graywater reuse and disposal system abandonment. A person abandoning a graywater reuse and disposal system must remove the graywater diversion valve and direct all graywater flow to an approved sewerage system or an onsite wastewater treatment system approved under OAR 340-071.
Stat. Auth.: ORS 454.610, 454.625, 468.020, & 468B.010
Stats. Implemented: ORS 454.610, 454.615, 468B.020 & 468B.050