USGS Water Use Data for the Nation - National Water Information System (NWIS)

The U.S. Geological Survey's National Water-Use Information Program is responsible for compiling and disseminating the nation's water-use data. The USGS works in cooperation with local, State, and Federal environmental agencies to collect water-use information. USGS compiles these data to produce water-use information aggregated at the county, state, and national levels. Every five years, data at the county level are compiled into a national water-use data system and state-level data are published in a national circular. Over the history of these circulars, the water-use categories have had some changes.

美国地质调查局（U.S. Geological Survey，USGS）的国家水资源使用信息项目负责汇编并发布美国全国的水资源使用数据。USGS与地方、州级及联邦级环境机构开展合作，采集水资源使用相关信息。该局会整合上述数据，生成按县级、州级及全国层级汇总的水资源使用信息。每五年，县级水资源使用数据将被整合至全国水资源使用数据系统，州级数据则会刊发于全国通报。纵观该系列通报的发展历程，水资源使用分类体系曾历经数次调整。