本标准的目的是为希望根据本标准实施此类计划的公用事业机构制定正式的公用事业节水和效率计划的标准。本标准可供制定和评估水利设施节约和效率计划时参考。对标准进行的主要修订包括更新标题和多个章节，以包括术语“节水”和“效率”；缺水或干旱计划的新要求；与计量、费率结构和计费相关的更新要求；与景观改造相关的新章节；更新与水审计、验证和公共可用性相关的当前公用事业要求；新的章节反映了将水资源效率纳入土地利用规划的情况，澄清了批发机构的要求应适当，并与管理当局保持一致； 以及更新的文档，以确保与新增的新需求部分保持一致。

The purpose of this standard is to establish criteria for the establishment of a formal utility water conservation and efficiency program for utilities that wish to implement such a program under this standard. This standard can be referenced in the development and evaluation of water utility conservation and efficiency programs. Major revisions made to the standard include updating of the title and multiple sections to include the terminology water conservation "and efficiency"; new requirement for water shortage or drought plan; updated requirements related to metering, rate structures, and billing; a new section related to landscape transformations; updated current utility requirements related to water audit, validation, and public availability; new section to reflect integration of water efficiency into land-use planning, clarified that wholesale agency requirements should be appropriate and consistent with governing authorities; and updated documentation to ensure correspondence with new requirement sections that were added.