After agencies have completed a water audit analysis, preferably with a data validity score of 60 or greater, the next step to developing a pro-active water loss control program is to conduct a component analysis. "A leakage component analysis disaggregates the total volume of real losses as calculated in the “top-down” water audit into its three components: Background Leakage, Unreported Leakage, and Reported Leakage. By combining the component analysis with an evaluation of least cost real loss reduction strategies it is possible to calculate how much of each leakage component can be economically reduced through the right combination of intervention tools." (Real Loss Component Analysis: A Tool for Economic Water Loss Control, page 19)
The Water Research Foundation in partnership with the EPA and Water Systems Optimization developed a real loss component analysis tool developed by - WRF project 4372. The project "provides water utilities with an analysis tool to better understand the sources of their real losses (reported, un-reported, or background) and a means of analyzing their economic intervention strategies."
The Component Analysis tool is developed to work with data from the AWWA Water Audit Software. The WRF project page includes links to download the free component analysis tool, and the research report. Use of the WRF Component Analysis tool is not required for the Council's BMP reporting, but it may be a helpful tool for agencies looking to complete a component analysis as required by BMP 1.2 by year 4.
The WRF project 4372 page includes a link to view a webinar recording demonstrating the tool, the Leakage Component Analysis Model, and a Leak Repair Data Collection Guide.