Workman repairing a pipe

Water Loss Control

Water loss control represents the efforts of water utilities to provide accountability in their operation by reliably auditing their water supplies and implementing controls to minimize system losses. Log in to access the Water Audit Software.

Questions? Contact AWWA's Water Loss Control Committee directly.

Free Water Audit Software

As announced on March 22 at the White House Water Summit, AWWA is challenging 1,000 water utilities to conduct a water audit using AWWA's newest software and report their findings to AWWA, their governing boards, and the customers they serve. For those water utilities ready to take it to the next level, AWWA is challenging you to conduct a validation on your completed top-down water audit. Contact Alex Gerling for more details or to report the findings of your audit.

Please fill out this short form to receive the AWWA Water Loss Control Committee Free Water Audit Software v5.0 (2014) .

Your information will not be shared with third parties or used for marketing purposes.


Free Tools for Water Loss Analysis

Water Audit Software & Compiler

The AWWA Free Water Audit Software© (Audit Software) was first released in 2006, and has been through several generations. It includes a data-grading capability that allows the auditor to rate the overall degree of validity of their water audit data. Guidance on loss control planning is given based upon the credibility of the data and the measure of losses displayed by the water audit. The current version of the Audit Software is Version 5.0, published in 2014. Highlighted features of Version 5.0 include a visual dashboard for graphical display of nonrevenue water components, a comments feature for capture of essential notes, and improved overall user experience.

The AWWA Water Audit Compiler© (Compiler) was launched in 2011 and can be utilized to quickly assemble water audit data from multiple water utilities; allowing for comparisons of data across water utilities. The Compiler can also be used to compile multiple years’ of water audit data for a single utility; allowing the water efficiency history of a water utility to be viewed at a single glance. The current version of the Compiler (Version 5.0) was released in 2014.

Like the Audit Software, the Compiler was created in a Microsoft Excel® spreadsheet format and the Compiler works hand-in-hand with the Audit Software. The Compiler was developed to improve the management of water audit datasets containing multiple water audits in small or large number. It was originally devised to help state and regional water resources agencies to easily aggregate and analyze large datasets and to provide trending and analysis tools to guide the process.

During data assembly in the Compiler, different units of measurement can be automatically converted to other units to facilitate direct comparisons (a new feature in Version 5.0). If some of the water audit data of a group of utilities is given in metric volumes (megalitres), while the majority of utility data is given in gallons, the Compiler can convert the metric units to gallons so that all of the data gathered into the Compiler is in consistent units for analysis. Once data is assembled in the Compiler, graphics can be displayed and sorted easily with any of the audit inputs and outputs. The data gathered into the Compiler can also be exported to a separate Microsoft Excel® spreadsheet where the user can conduct further analysis of their own design.

Leakage Component Analysis Model

In 2014, the Water Research Foundation, with support from the US Environmental Protection Agency published the final report and spreadsheet software tool for Project 4372a entitled Real Loss Component Analysis: A Tool for Economic Water Loss Control. The purpose of research project 4372a was to identify the best methods for conducting a leakage component analysis to be used to set a cost-effective leakage control strategy in a water utility. The project was also charged to employ these best practices in the creation of a spreadsheet software tool that works in complimentary fashion with the Audit Software. The key project deliverable was the Leakage Component Analysis Model (LCA Model). 

Since the water audit results provide an annual real loss volume that is determined as a catch-all quantity remaining after all of audit components are input, very limited insight is given for leakage control purposes when compiling the water audit. The LCA Model was designed to pick up where the AWWA Free Water Audit Software leaves off, in terms of leakage assessments. The LCA Model provides the water industry with an easy-to-use spreadsheet tool to conduct a leakage component analysis, determine the water utility’s failure frequency analysis, provide guidance to set the economic leakage control intervention strategy, and display key water loss performance indicators.

Project 4372b entitled Water Audits in the United States: A Review of Water Losses and Data Validity summarizes state regulations on water loss reporting and analyzes 4,575 water audits (that follow AWWA water audit methodology) submitted to the California Urban Water Conservation Council, Georgia EPD, Texas Water Development Board, Tennessee Comptroller of the Treasury, and the Delaware River Basin Commission from 2011-2014. The results provide a national snapshot of water loss reporting, including an assessment of water audit validity and median results for key performance indicators.

The LCA Model, and accompanying Leak Repair Data Collection Guide are available for free download (click on Web Tools, bottom of page) from the Water Research Foundation.

Validated Water Audit Data


The AWWA Water Loss Control Committee has been collecting and validating water audit data from approximately 25 to 30 North American utilities using the IWA/AWWA Water Loss Methodology since 2011. In the inaugural year, water loss findings from 21 North American utilities were presented in an analysis report, and validated audits have been added to the North American dataset each subsequent year. This ongoing project is known as the Water Audit Data Initiative (WADI). The most recently published results (2015) can now be downloaded from the link below.

AWWA publications

Journal - American Water Works Association, a professional and scholarly journal published continuously since 1914, is the most respected publication in the water industry. 
Visit Journal AWWA.

Recent articles:

Search for more articles

Written primarily by AWWA members, Opflow provides technically detailed case studies and how-to articles that help readers provide safe water to all. Visit Opflow.

Recent articles:

Search for more articles


AWWA related products

  Advanced Search
4 Results
1 - 4 of 4
1 - 4 of 4

Events calendar

The Water Show Africa 2017
March 28, 2017 / Johannesburg, Gauteng South Africa

2017 Design-Build for Water & Wastewater
March 29, 2017 / Minneapolis, MN

THE WATER EXPO 2017 (6th edition)
August 30, 2017 / Miami, FL

WaterSmart Innovations
October 04, 2017 / Las Vegas, NV

2017 Water Infrastructure Conference & Exposition
October 30, 2017 / Houston, TX

Water Loss Seminar

Register now!

Scholarship Opportunities

Are you pursuing a degree related to water? Take a look at the wide range of scholarships available from AWWA and our partners. 

Full list of scholarships

Water Loss Control basics

Utilities incur real losses from pipeline leakage and apparent losses when customer water consumption is not properly measured or billed. AWWA advocates the water audit method developed jointly by the International Water Association and AWWA. The IWA/AWWA Water Audit Method provides the best management practice tools and guidance water utilities need to efficiently manage their supplies. 

Natural Resources Defense Council

NRDC has developed an interactive map of the US highlighting what policies are being adopted to report water losses accurately and set targets for water loss reduction. 

US Water Loss Control Efforts

Water Values logoThe Water Values Podcast

Check out The Water Values Podcast for insightful interviews of industry thought leaders on a wide range of water-related topics.

M36: Water Audits & Loss Control Programs

M36: Water Audits & Loss Control Programs

The fourth edition of M36 features the latest information on major advancements in water audit methodology, leakage management and revenue enhancement technologies. 

Learn more about M36

Level 1 Water Audit Validation

Level 1 water audit validation confirms that American Water Works Association M36 water audit methodology was correctly applied to a utility's specific situation, identifies evident inaccuracies in summary water audit data, and verifies that data validity grades accurately reflect utility practices.

View the Executive Summary and the Guidance Manual

AWWA Policy Statements