遵守最近提出的氡最高污染水平可能会给美国公共供水行业带来巨大的支出。预计超过30000家公用事业公司将发现其地下水供应量超过300 pCi/L的拟议限制。本文作者估计，美国各地安装和运行氡去除技术的成本将达到25亿美元/年，其中超过三分之二的成本由服务500人或更少人的小型供水系统承担。 本文总结了对遵守拟议的氡MCL的成本大小和分布的独立分析。包括18个参考文献、表格、图表。

Compliance with recently proposed maximum contaminant levels for radon is likely to involve a significant expenditure for the US public water supply industry. More than 30,000 utilities are expected to find that their groundwater supplies exceed the proposed limit of 300 pCi/L. The authors of this article have estimated that the costs of installing and operating radon removal technologies across the United States will amount to $2.5 billion/year, with more than two thirds of those costs being borne by the very small water systems that serve 500 or fewer people. This article summarizes an independent analysis of the magnitude and distribution of the costs of compliance with the proposed MCL for radon. Includes 18 references, tables, figures.