ANSI/AARST MW-RN-2020包含测量通过地下水供应进入建筑物的水中氡的最低要求和指南，以确定是否有必要采取缓解措施来保护住宅和其他建筑物的当前和未来居住者。本标准包括水样收集和运输程序，以及将水样定量转移至测量装置以确定水中氡浓度的协议。

ANSI/AARST MW-RN-2020 contains minimum requirements and guidance for measuring radon in water that enters a building through groundwater supplies for determining if mitigation is necessary to protect current and future occupants of dwellings and other buildings. This standard includes procedures for the collection and transport of water samples, as well as protocols for the quantitative transfer of the sample to a measurement device to determine radon concentrations in water.