Water-Quality Information -- Data

USGS

• NWISWeb System Available - Access to data from over 1.5 million sites around the country, including real-time and historic streamflow and stage data, ground water levels, water quality data, and site information.
• National Stream Quality Accounting Network (NASQAN) and Benchmark Data
• Data from Selected U.S. Geological Survey National Stream Water-Quality Monitoring Networks (WQN) on CD-ROM
• National Water Quality Assessment -- NAWQA Data
• National Atmospheric Deposition Program/National Trends Network -- NADP/NTN Atmospheric Deposition Data
• NWIS - National Water Information System
• Chemical Abstracts Service (CAS) number and NWIS parameter code cross reference (zipped MS-Excel)
• Streamflow: Realtime
• Suspended-Sediment Database (Daily values of suspended sediment and ancillary data)
• Software Links

Other Agencies

• USEPA Databases
• STOrage and RETrieval System for Water and Biological Monitoring Data -- STORET
• National Climatic Data Center (NOAA)
• National Atlas of the United States
• National Transportation Atlas (Geospatial data sets)
• The EXtension TOXicology NETwork (EXTOXNET Pesticide information)
• OSTI - Department of Energy and other databases
• USEPA/OPP/California Department of Pesticide Registration's Chemical Ingredients Database Query (Pesticide database)

OWQ Web Team