Historically, the water auditing process has been used inconsistently and sporadically in North America. With the creation of the AWWA/IWA Water Audit Methodology and corresponding outreach by water utilities this trend is changing.� State and regional regulatory agencies in the United States have begun to embrace the AWWA/IWA Water Audit Methodology as 1) an improved and reliable practice compared to the imprecise unaccounted-for water process, and 2) a standardized approach that can produce data which allows performance comparisons and benchmarking of best practices. Several regulatory agencies have begun to institute the use of standardized water audits. Examples are presented from agencies that have taken a leading role in implementing water utility loss reduction programs.