Quick Answer
Greywater use in California is regulated by the California Department of Public Health (CDPH) and governed by various state laws and guidelines, primarily the California Plumbing Code and the California Water Code. The CDPH provides model guidelines for greywater reuse systems, which local authorities can adopt or modify. These regulations aim to ensure safe and efficient greywater use.
Greywater System Requirements
Greywater systems in California must meet specific requirements, including a minimum size of 20 gallons for a single-family residence, with a recommended size of 30-50 gallons for a typical household. The system should be designed to handle 80% of the total greywater generated, with a maximum flow rate of 2.4 gallons per minute. It is essential to install a greywater treatment component, such as a filter or a media, to remove contaminants and prevent clogging.
Installation and Maintenance
When installing a greywater branched drain system, it is crucial to follow the CDPH guidelines and local regulations. The system should be installed at least 10 feet away from any watercourse, well, or potential groundwater recharge area. Regular maintenance, including inspecting and cleaning the pipes and treatment components, is essential to prevent clogging and ensure proper system function.
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