Measurement and evaluation (M&E) of water savings are fundamental to understanding the effectiveness of urban water conservation programs. Measurement involves the systematic collection of data on water usage, program participation,...
CalWEP’s mission is to maximize urban water efficiency and conservation throughout California.
We do this by supporting and integrating innovative technologies and practices; encouraging effective public policies; advancing research, training, and public education; and building collaborative approaches and partnerships.
May 27-28, 2026
For nearly a decade, Peer to Peer has been the California Water Efficiency Partnership’s flagship event, bringing together a highly engaged community of water efficiency and conservation professionals in an intentionally intimate setting.
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Measurement and evaluation (M&E) of water savings are fundamental to understanding the effectiveness of urban water conservation programs. Measurement involves the systematic collection of data on water usage, program participation,...
California’s landmark Assembly Bill 1572 (AB 1572) prohibits the use of potable water to irrigate nonfunctional turf (NFT) on commercial, industrial, and institutional properties—including homeowners’ association common areas. To support...
This guidebook is designed to help water suppliers comply with the “Making Conservation as a California Way of Life” framework (WUE Regulation), focusing specifically on the classification of Commercial, Industrial,...
Updated October 2024 CalWEP, in coordination with DWR and the State Water Board, has prepared a detailed guide on the UWUO Alternative Data Process. This guidance document helps water suppliers request...
"When I'm looking for new resources about water conservation and efficiency, CalWEP and the Alliance for Water Efficiency are my go-to organizations. They have years of experience and have cultivated the information I need to make informed decisions."
"CalWEP is an incredible key partner in meeting water use efficiency goals and requirements. Their vital Peer to Peer events provide excellent learning opportunities. In addition, their practical tools assist water suppliers as they navigate the implementation of California’s water use efficiency regulations in support of water supply resiliency goals."
"We partner with CalWEP on our Smart Rebates program. They handle the approval, administration and processing of rebate applications and send payments directly to our customers. This important water-saving program allows District staff to focus on other water-saving endeavors."