《安全饮用水法》的《国家临时初级饮用水条例》对小型供水企业有着明确的财务影响，这些企业占美国供水企业的95%。本文研究了这些公用事业的成本结构和财务问题，并针对选定的案例，对满足NIPDWR要求可能产生的成本进行了估算。包括13个参考文献、表格、图表。

The Safe Drinking Water Act's National Interim Primary Drinking Water Regulations have a definite financial impact on small water utilities, which account for 95 percent of U.S. water suppliers. This paper examines the cost structure and financial problems of these utilities and presents, for selected cases, estimates of the costs that may be incurred in meeting NIPDWR requirements. Includes 13 references, tables, figures.