二次水系统输送的水是 低于饮用水的质量，通常用于供应 户外灌溉需要。二次水源 包括未经处理的山体径流和地下水 那不适合喝。越来越多 许多二次系统正在考虑计量 这是为了鼓励用户节约用水，因为 这些系统的计量不足一直是个问题 结果表明，这会导致总体用水量的增加。 这项研究比较了不同的计量技术， 其中一些需要过滤才能清洗 二次水的水位应足以使仪表 表现良好。作者描述了成本， 各种策略的利弊 用于计量和相关过滤，以及 不计量的选项。这篇文章提供了 一种估算项目初始成本的方法 每个连接的计量。中学教育实践 犹他州的系统被讨论以提供视角 在决定是否 仪表，通常侧重于经济效益 可行性包括24个参考文献、表格和图表。

Secondary water systems deliver water that is of lower quality than drinking water, usually to supply outdoor irrigation needs. Secondary water sources include untreated mountain runoff and groundwater that is unsuitable for drinking. An increasing number of secondary systems are considering metering this water to encourage user conservation, because the lack of metering on these systems has been shown to lead to an increase in overall water use. This study compares different metering technologies, some of which require filtration to clean secondary water to a level sufficient for meters to perform well. The authors describe the costs, benefits, and disadvantages of various strategies for metering and associated filtration as well as the option of not metering. The article provides an approach to estimating the initial costs of metering per connection. Practices of secondary systems in Utah are discussed to provide perspective in making the decision of whether or not to meter, which usually focuses on economic feasibility. Includes 24 references, tables, figure.