USGS Water Data for the Nation
Site Owner: US Geological Survey (USGS)
Link to Data: Indirect
Geographical Scope: USA
Data Export Formats: RDB, XML, JSON (see comment)
Entry point provided by the US Geological Survey for data on water flow and levels, water quality and water use data in the US.
same data as on the USGS Water Services site, designed for human ad-hoc inquiries and browsing
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