Resources: Water Loss Regulation Economic
Model Customization Training 
“I want to thank all of you that contributed to this webinar. This was the most beneficial and straightforward information we've received to date. Thank you!”
Madeline Blua

Additional Information


California Water Loss Control Collaborative

CA-NV AWWA leads a broad group of stakeholders that came together in 2015 to combat water loss in California.  The California Water Loss Control Collaborative includes utility personnel, industry organizations, consultants, non-profits as well as state entities.

The Collaborative includes:

  • CA-NV AWWA Water Loss Control Committee – share best practices, non-revenue water challenges and successes, discuss technology innovations, and participate in planning conference technical sessions and specialty workshops. Coordinates with the AWWA Water Loss Control Committee.
  • California Water Loss Collaborative Steering Committee – overarching coordination and program implementation between Collaborative activities. For information, contact Amy Talbot,
  • Water Audit Validator (WAV) Certificate Program - Water Audit Validators examine water loss audit inputs prior to audit submission to the California Department of Water Resources (per SB555).
  • Department of Water Resources (DWR) - Water Loss Audit Reporting
    • Water Loss Program
    • Water Loss Audit Reports
    • Regulations
    • Submission
    • Note: AWWA recommends using version 6.0 unless your regulatory agency requires you to use version 5.0. California Urban Water Suppliers should continue to submit version 5.0 water audits to DWR through 2023. Beginning January 1, 2024 version 6.0 will be required. Currently, DWR's WUEData portal only accepts version 5.0 water audit submittals.
  • State Water Resources Control Board - Water Loss Performance Standards
The Water Loss Control Technical Assistance Program (WLTAP) was funded wholly or in part by the United States Environmental Protection Agency and the State Water Resources Control Board, through the State Revolving Fund set-aside for technical assistance.  We are grateful to the EPA and the Water Board for their support.

CA-NV AWWA provided The Water Loss Technical Assistance Program from 2016 through 2019 .
The Final Report is available
For more details and to access Water Loss TAP resources, please visit

If you have any questions about the Water Loss TAP please contact Sue Mosburg at