Six-Year Review Contaminant Occurrence Data

The Safe Drinking Water Act (SDWA) requires EPA to review each National Primary Drinking Water Regulation (NPDWR) at least once every six years and revise them, if...《安全饮用水法案》（Safe Drinking Water Act, SDWA）要求美国环境保护署（Environmental Protection Agency, EPA）每六年至少对每一项国家一级饮用水法规（National Primary Drinking Water Regulation, NPDWR）开展一次审查，并在必要时对其进行修订……