Per the State’s Validated Water Loss Audit Reporting Regulations (link):

§ 638.4. Technical Qualifications for a Water Audit Validator.

(1) A contractor working in the CA-NV AWWA Water Loss Technical Assistance Program (“Water Loss TAP”) performing water loss audit training and conducting audit validations.

  • Water Systems Optimization (WSO)

  • Cavanaugh

(2) An individual who can demonstrate having conducted water loss audits in accordance with the method specified in Section 638.2, and having conducted a minimum of 10 Level 1 audit validations in accordance with the Water Research Foundation Level 1 Water Audit Validation: Guidance Manual 4639A (Water Audit Validation).

  • Consulting Firms which may have these individuals:

  • Arcadis USA

  • CH2M (Now Jacobs)

  • GHD

  • Kunkel Water Efficiency Consulting

  • ME Simpson

 (3) An individual certified by the CA-NV AWWA as a water audit validator.

Click here to go to our lookup of certified individuals. 

For more information, please contact William Penn, Director of Educational Programs at 909.291.2116.

Water Audit Validator Certificate

Become a California Water Audit Validator

The Water Audit Validator course is a 3-day program designed to qualify individuals to perform Level 1 water audit validations in California. Water audit validators examine water loss audit inputs to consider the water audit's accuracy and document the sources of uncertainty. Per Senate Bill 555 urban retail water suppliers must submit validated distribution system water audits by October 1 each year. Individuals who successfully complete this course and exam will receive a Water Audit Validator certificate. The certificate will be valid for 3 years.
View the WAV Training Manual. 

  Sue Mosburg, Director, (pictured 3rd from right) and William Penn,
Director of Educational Programs (pictured 2nd from right)
accept the AWWA Section Education Award for WAV at AWWA ACE 2019.

Water Audit Validator’s must formally document the validation and provide proof of their work back to the Water System. These documents can assist with that effort:

Validation Cover Sheet Template
(Microsoft Word Document)
Validation Notes Template
(Microsoft Word Document)

Why should you become a Water Audit Validator (WAV) through the new CA-NV AWWA program?

  • Help your California urban water supplier comply with Senate bill (SB 555)
  • Professional Development
  • Water Auditor is NOT the same as a Water Audit Validator
  • Provide a required service to your client or neighboring water agency

Who can obtain a WAV Certificate?

  • Open to all interested persons including utility staff and consultants
  • Must have working knowledge of the water audit methodology (AWWA M36) and experience with the AWWA Free Water Audit Software is recommended

*Per SB 555, anyone who was not a contractor for the Water Loss TAP Program or who previously completed at least ten Level 1 Audit Validations must have a CA-NV AWWA certificate to do validations. The WAV training is the method the Section will be using to certify validators. All validators beginning with July 2019 submissions must have a Section WAV certification.