Audit Tools
First introduced by the American Water Works Association (AWWA) in 1957, “water auditing” proposed tracking water loss as a percentage of estimated losses over the volume of water supplied. At that time, the terms “unaccounted-for-water“ or “unaccounted-for-percentage“ were widely adopted by water utilities in response to the 1957 AWWA guidance; since then, those concepts have been superseded.
The current industry standard tracks “non-revenue” water (which includes “real” and “apparent” losses) using the AWWA/International Water Association (IWA) Water Audit Method, leaving nothing “unaccounted for.” The AWWA/IWA Water Audit Method is based on the Water Balance Table. When water systems use the Water Balance Table in combination with the AWWA/IWA methodology, all “real“ and “apparent” water losses are categorized and valued, laying the foundation for action to combat both of those types of losses. This section provides tools that can be used to complete a water audit.
AWWA Free Water Audit Software Versions 5.0 (2014) and 6.0 (2020)
The IWA/AWWA Water Audit Method provides the best management practice tools and guidance water utilities need to efficiently manage their supplies.
Customer Retail Unit Cost Calculation Tool
This Workbook is designed to assist with the calculation of the Customer Retail Unit Cost (“CRUC”) value found in cell 77G on the Reporting Worksheet of the AWWA Water Audit Software Ver. 5. This cost represents the average volume.
Data Validity Worksheet
These tables allow you to analyze the data grades for each input in AWWA’s Water Audit Software.
Flow Weighted Average Tool
This tool helps you calculate a flow weighted average.
GA Water System Audit and Water Loss Control Manual
The Georgia Environmental Protection Division (EPD) announces the release of the GA Water System Audit and Water Loss Control Manual. This new manual will assist water providers in meeting the new statutory requirements outlined in the Georgia Water Stewardship Act of 2010 (SB 370/HB 1094).
Generic v6 Water Loss Audit Procedures Template
An editable Word template for documenting Water Audit procedures at a utility to facilitate the timely preparation of annual water audits using v6 of the AWWA Free Water Audit Software.
Level 1 Water Audit Validation: Guidance Manual
This project seeks to define and guide water utilities and regulatory entities in understanding what makes an accurate and reliable water audit, following AWWA methodology for water audits. This project is structured to provide North American water utilities and regulatory entities with clear guidance and a standardized methodology for validation of water audit data.
M6 Water Meters: Selection, Installation, Testing and Maintenance (5th Edition)
M6 provides a complete practice manual on types, selection, use, and maintenance of water meters for water service.
The Water Audit Handbook for Small Drinking Water Systems
To assist small systems with in preparing an audit, the Southwest Environmental Finance Center developed The Water Audit Handbook for Small Drinking Water Systems.
Water Audit Data Grading Sheets
These tables allow you to analyze the data grades for each input in AWWA’s Water Audit Software.
Water Audit Validator Certificate Course Training Manual
Water Audit Validators examine water loss audit inputs prior to audit submission to the California Department of Water Resources (per SB555).
Water Loss Audit
In response to the mandates of House Bill 3338, TWDB developed this water audit tool for utilities that measures efficiency, encourages water accountability, quantifies water losses, and standardizes water loss reporting across the state.