本文讨论了由环境保护机构国家卫生基金会制定的用于小型水系统使用的包装水处理设备性能评价的环境技术验证（ETV）试验计划。本手册材料涵盖四个ETV测试计划，用于评估去除微生物和颗粒污染物的过滤技术，包括:凝固/过滤；预涂层过滤；袋式过滤和筒式过滤；反冲洗深度过滤。这些测试计划旨在对不同品牌的设备进行严格程度相同的评估，目的是要求在提供可靠运行和水质数据的条件下进行测试。

This paper discusses the Environmental Technology Verification (ETV) test plans for evaluation of the performance of package water treatment equipment intended for use by small water systems, which have been developed by the National Sanitation Foundation for the Environmental Protection Agency. This workbook material covers four ETV test plans for evaluation of filtration technologies for removal of microbiological and particulate contaminants that include: coagulation/filtration; precoat filtration; bag filtration and cartridge filtration; and, backwashable depth filtration. These test plans are intended to result in evaluation of different brands of equipment with the same degree of rigor with the goal of requiring tests under conditions that will provide credible operating and water quality data.