The Water Data for the Nation discrete sample data base is a compilation of over 4.4 million historical water quality analyses in the USGS district data bases through September 2005. Search USGS NOTICE: In January 2020, USGS WaterWatch began operating in maintenance-only mode. Recording and transmission times may be more frequent during critical events. Please contact USGS WaterWatch if you have any questions. NOTICE: In January 2020, USGS WaterWatch began operating in maintenance-only mode. Find out more at the Water Quality Web Services web site . By viewing the Google Maps API on this web site the user agrees to these TERMS of Service set forth by Google. 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. 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. The USGS WaterNow service lets users receive current conditions for USGS water-data-collection stations on demand via email or cell-phone text message. 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. 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 provides real-time or near-real-time conditions water data at sites across the Nation. 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 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. 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. 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. 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. 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