使用经过测试和验证的方法的使用点和入口水处理系统是将化学污染物减少到可接受水平的传统系统的有效替代方案。反渗透是减少无机污染物最普遍有效的技术。活性炭吸附是减少有机污染最普遍有效的方法。讨论了几种技术及其放置。关于使用点和入口水处理的现场研究表明，该技术对社区应用是有效的。到目前为止，这些设备中的细菌生长尚未被证明是健康问题。初步成本信息表明了使用点系统的优势，尤其是对于小型社区。包括40个参考文献、表格和图表。

Point-of-use and point-of-entry water treatment systems that utilize tested and proven methods are an effective alternative to conventional systems for the reduction of chemical contaminants to acceptable levels. Reverse osmosis is the most universally effective technology for reducing inorganic contaminants. Adsorption by activated carbon is the most universally effective method for reducing organic contamination. Several technologies and their placements are discussed. Field studies concerning point-of-use and point-of-entry water treatment show this technology to be effective for community application. Thus far, bacterial growth in these devices has not been shown to be a health problem. Preliminary cost information indicates the advantage of point-of-use systems, especially for small communities. Includes 40 references, tables, figure.