小型供水系统——定义为服务于3300人或更少人口的社区和非临时非社区供水系统——也受铅和铜规则的监管。该规则要求这些系统证明，客户水龙头中现有的铅和铜水平低于EPA定义的“行动水平”，或者已经安装了最佳处理方法来控制铅和铜。该规则的目的是尽量减少铅和铜在自来水中的溶解。水系统中这些物质含量高与健康和审美问题有关。与所有法规一样，合规性也会带来成本。实施腐蚀控制处理的成本将根据系统大小而变化；随着服务客户数量的增加，规模经济得以实现。环境保护局（EPA）报告称，对于较小的系统（小于50000），处理费用估计为每户每年2美元至20美元，而监测费用约为3美元。 每户每年100美元。本文概述了铅和铜规则的要求，并讨论了合规策略，包括治疗方案。提出了处理的工程要求，为面向处理设施安装的小型系统提供指导。还提供了案例研究样本。

Small systems--defined as community and nontransient noncommunity water systems that serve a population of 3,300 or less--are also regulated by the Lead and Copper Rule. The rule requires these systems to demonstrate that the existing lead and copper levels in customer taps are below the EPA-defined "action level" or that optimal treatment has been installed to control lead and copper. The intent of the rule is to minimize the dissolution of lead and copper into tap water. High levels of these substances in water systems have been linked to health and aesthetic problems. As with all regulations, there is a cost associated with compliance. The cost to implement corrosion control treatment will vary based on system size; economies of scale are realized as the number of customers served increases. The Environmental Protection Agency (EPA) reports that, for smaller systems (less than 50,000), treatment is estimated to cost $2.00 to $20.00 per household per year, while monitoring will cost approximately $3.00 per household per year. This paper provides an overview of the Lead and Copper Rule's requirements and discusses compliance strategy, including treatment options. The engineering requirements for treatment are presented to provide guidance to small systems facing installation of treatment facilities. Sample case studies are also provided.