自1994年以来，作为1992年《联邦能源政策法案》的一部分，对淋浴头、水龙头、厕所和小便器实施了新的低流量标准，降低了用户用水水平。塔科马水务公司（位于华盛顿州西部）需要估算与实施这些新标准相关的节约用水的累积影响。据估计，塔科马水务公司为单户、多户、非住宅和批发客户节约了水资源。估计节约的水资源分为新住宅和企业节约的水资源，以及使用第三方可用水资源改造住宅和企业节约的水资源- 派对信息。根据本文讨论的分析，塔科马水务公司1998年因实施高效管道规范装置而节约的总水量估计为4.114亿加仑，即每天约113万加仑。在这些估计节约的水资源中，约39%来自新建的住宅和企业，而其余61%则来自对旧设备的翻新和更换。包括桌子。

Since 1994, implementation of new low-flow standards for showerheads, faucets, toilets, and urinals enacted as part of the Federal Energy Policy Act of 1992 has reduced customer water usage levels. Tacoma Water (in western Washington State) needed an estimate of the cumulative impact of the water savings associated with implementation of these new standards. Water savings at Tacoma Water were estimated for single family, multi-family, non-residential, and wholesale customers. The estimated water savings were separated into savings attributable to new homes and businesses and savings attributable to retrofitted homes and businesses using available third-party information. Based on the analysis discussed in this paper, Tacoma Water's total water savings in 1998 from implementation of efficient plumbing code fixtures were estimated at an overall level of 411.4 million gallons or approximately 1.13 million gallons per day. Approximately 39 percent of these estimated water savings was attributable to newly constructed homes and businesses while the remaining 61 percent was due to retrofit replacement of older fixtures. Includes tables.