解释了第一条要求使用小容量厕所的州法律的制定、实施和潜在好处。马萨诸塞州的新管道规范要求，在新建或替换现有厕所期间安装的所有两件式水箱式和落地式冲水阀厕所每次冲水量不得超过1.6加仑。这项法规变更旨在帮助缓解当前和长期的供水问题，这是全州首例此类变更，并激励了拟议的联邦立法，为管道装置制定以节约为导向的用水标准。小容量厕所有可能成为水需求管理的一个重要因素。包括10个参考文献、表格和图表。

Explains the development, implementation, and potential benefits of the first statewide law requiring use of low-volume toilets. The new plumbing code in Massachusetts requires all two-piece tank-type and floor-mounted flush-valve toilets installed during new construction or as replacements of existing toilets to use no more than 1.6 gallon per flush. This code change, made to help mitigate immediate as well as long-term water supply problems, is the first of its kind on a statewide basis and has served as an incentive for proposed federal legislation to establish conservation-oriented water use standards for plumbing fixtures. Low-volume toilets have the potential to be a significant factor in water demand management. Includes 10 references, tables, figures.