铅和铜规则下的监测要求于1992年对大中型公共供水商生效，并将于1993年对小型系统生效。从20世纪80年代中期开始，纽波特纽斯自来水厂开始计划降低铅和铜的自来水限制。铅服务管线更换计划已经完成，通过使用正磷酸锌进行的缓蚀处理已经优化，以限制铅的含量，自1988年以来，tap监测已经到位。从铅和铜规则合规性监测中获得的结果表明，这些努力有助于遵守规则下铅和铜的行动水平，并降低了客户水龙头处的铅水平。包括5个参考文献、表格、图表。

Monitoring requirements under the Lead and Copper Rule took effect in 1992 for large and medium-size public water suppliers and will take effect in 1993 for small systems. Starting in the mid-1980s, the Newport News Waterworks began planning for compliance with lower tap water limits for lead and copper. A lead service line replacement program has been completed, corrosion inhibition treatment through the use of zinc orthophosphate has been optimized to limit lead, and at-the-tap monitoring has been in place since 1988. Results obtained from Lead and Copper Rule compliance monitoring indicate these efforts have contributed to compliance with the action levels for lead and copper under the rule and have reduced lead levels at customers' taps. Includes 5 references, tables, figures.