WSO is certified to conduct level 1 validations in California and Georgia. We've done more than two hundred validations in California so far and we'd be happy to work with you. Validation is completed in three steps — start here!

Schedule & Contract

Reserve a validation session with us below. We'll be in touch with contract details.

Upload Documents

Upload your water audit and supporting documents so we can prepare for the call.

Validation Session

Join the validation call to review your water audit and discuss practices.

Schedule & Contract

Let's get a time on the books for your validation call using the scheduling tool below.
But, be sure to review the scope and example contract too!


Select the time for your Level 1 Validation Session below. We encourage you to select a session as early as possible.


Upon reserving a validation session, WSO will connect with you on contracting. In the meantime, please reference the documents below to understand the standard scope and contract for validation.

Scope Example:

Contract Example:

coming soon!

Price: $2,500

Upload Documents

Find a list of required and supplemental supporting documents in the table below. Once you've assembled the materials, go ahead and upload them using the portal.

List of Supporting Documents



Complete AWWA Free Water Audit Software (Excel Spreadsheet; Must be CY17 or FY 17-18) Customer Meter Inaccuracy derivation
Volume from Own Sources volumes by month by finished water supply meter Average Operating Pressure derivation
Water Imported volumes by month by import connection Customer Retail Unit Cost derivation
Water Exported volumes by month by export connection Variable Production Cost derivation
Metered Consumption volumes by month and rate code (e.g. charge status, water type, customer class) System schematic showing locations of Own Source, Import, and Export meters
Supply Meter Testing and/or calibration documentation if conducted

Document Upload Portal

Validation Session

Content coming soon!

How to Prepare

What to Expect

Contact WSO

Fill out this contact form or email us at for more information about our services!