Search USGS NOTICE: In January 2020, USGS WaterWatch began operating in maintenance-only mode. The National Water Information System (NWIS) is the USGS water data portal where you can find a wealth of historic and real-time data related to floods. Recording and transmission times may be more frequent during critical events. The USGS WaterNow service lets users receive current conditions for USGS water-data-collection stations on demand via email or cell-phone text message. A jointly developed web service allows you to retrieve data for millions of quality checked water quality samples and results. The USGS investigates the occurrence, quantity, quality, distribution, and movement of surface and underground waters and disseminates the data to the public, State and local governments, public and private utilities, and other Federal agencies involved with managing our water resources. Current data typically are recorded at 15- to 60-minute intervals, stored onsite, and then transmitted to USGS offices every 1 to 4 hours, depending on the data relay technique used. By viewing the Google Maps API on this web site the user agrees to these TERMS of Service set forth by Google. Find out more at the Water Quality Web Services web site . The USGS provides real-time or near-real-time conditions water data at sites across the Nation. The USGS collects and analyzes chemical, physical, and biological properties of water, sediment and tissue samples from across the Nation. USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards ... API Documentation - Earthquake Catalog. Existing tools, features, and web data services are being fully maintained as before, but new tools and enhancements will no longer be developed. The USGS and the U.S. Environmental Protection Agency (EPA) each collect vast amounts of water quality data. NOTICE: In January 2020, USGS WaterWatch began operating in maintenance-only mode. WaterWatch Map of monthly streamflow compared to historical streamflow for the month of the year (Colorado) References to non-U.S. Department of the Interior (DOI) products do not constitute an endorsement by the DOI. The U.S. Geological Survey's (USGS) National Water Information System (NWIS) is a comprehensive and distributed application that supports the acquisition, processing, and long-term storage of water data. Current data typically are recorded at 15- to 60-minute intervals, stored onsite, and then transmitted to USGS offices every 1 to 4 hours, depending on the data relay technique used. Existing tools, features, and web data services are being fully maintained as before, but new tools and enhancements will no longer be developed. 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