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Water Data

Drinking water, rivers, groundwater, floods and water use. 69,684 datasets from federal, state and local publishers.

Datasets

69,684

Federal

10,000+

State

3,063

County and city

2,105

Most viewed water datasets

All water datasets

10,000+ datasets

Only the first 50 pages are listed. Narrow the list by area or type to see more.

Frequently asked questions

Who publishes water data?
The largest publishers in this catalog are Department of the Interior, National Oceanic and Atmospheric Administration, Department of Commerce, U.S. Census Bureau, Department of Commerce.
How do I download water data?
Open any dataset to see its file formats (CSV, JSON, GeoJSON and more) and API links. Every link goes to the official government source.
How are datasets assigned to topics?
We read each dataset's category, keywords and title from the source catalog and file it under up to three topics, so some datasets appear in more than one topic.

Source: Data.gov Catalog (GSA), state and local open data portals · Last updated 10/27/2026