The California Water Efficiency Partnership invites members and partners to join us for our Fall 2026 Plenary in Downtown Riverside, hosted by Western Water. This one-day, in-person event will bring together water efficiency professionals from across California for facilitated discussions, peer-to-peer learning, and timely updates on shared challenges and emerging priorities.

This year marked the 10th anniversary of Peer to Peer with more than 200 water efficiency professionals gathered in Napa for two days of learning, collaboration, and connection.

Catch up on all the action through our top 10 photo recap!

After several years in the making, CalWEP is proud to release Estimating Water Savings: Measurement and Evaluation Methods for Urban Water Conservation Programs. You don't need to be a statistician to get value from M&E - the guidebook exists so you can point to credible methods and back up your work!

CalWEP members are at the forefront of implementing California’s nonfunctional turf ban (AB 1572). Through a collaborative effort with our members, CalWEP has produced a full suite of resources designed to support consistent, effective communication and implementation statewide.

One of the most important roles CalWEP plays for its members is ensuring that the experience of water suppliers is in the room where water policy is discussed.

On March 11, that role brought CalWEP to the California State Capitol, where we participated as an expert witness before the California State CalWEP’s Deputy Director Melissa Matlock served this week as an expert witness before the California State Assembly Water, Parks, and Wildlife Committee in Sacramento during a hearing focused on the efficiency of large Commercial, Industrial, and Institutional (CII) water users.