The EPA's WaterSense program helps consumers identify water-efficient fixtures and appliances for indoor use, including those suitable for Southern California's climate.
The University of California's Cooperative Extension provides tips and resources for indoor water conservation in Southern California, including greywater reuse and rainwater harvesting.
The Southern California Water Committee offers a comprehensive guide to water-efficient systems for indoor use, including case studies and best practices for implementation.
WaterWise offers a range of water-efficient products and technologies for indoor use, including low-flow showerheads and toilets, suitable for Southern California's water conservation needs.
This video from the Los Angeles County Waterworks Districts provides tips and examples of drought-resistant landscaping and water-efficient systems for indoor and outdoor use in Southern California.
The Metropolitan Water District of Southern California offers a range of resources and incentives for water efficiency, including rebates for water-efficient appliances and fixtures.
Greywater Action provides information and resources on greywater systems for indoor use in Southern California, including design and installation guides.
The U.S. Department of Energy provides guidance on water-efficient systems for commercial and residential buildings, including those in Southern California, through its Building Technologies Office.