National Water Information System Nwis

The online National Water Information System (NWISWeb) provides access to more than 100 years of water data collected by the U.S. Geological Survey. The new Web site, NWISWeb: data for the Nation (http://waterdata.usgs.gov/nwis/) allows users to access several hundred million pieces of historical and real-time data. Aggregates all state data into one national database; integrates stream-flow information with many other types of water data, including historic water-quality data from rivers and aquifers, historic ground-water-level data, and real-time water quality, precipitation, and ground-water levels.