NWIS

National scope of USGS water quality sample and laboratory result data and information obtained from the NWIS/NWISWeb systems (the data available is a subset of NWISWeb) and NAWQA Data Warehouse

Additional facts from data.gov

Dataset Summary

• Date Released: 10/01/2008
• Date Updated: Ongoing
• Time Period: 1900-present
• Data.gov Data Category Type: Raw Data Catalog
• Frequency: various
• Specialized Data Category Designation: Geospatial

Contributing Agency Information

• Citation: NWIS – USGS Water Quality Web Service: http://qwwebservices.usgs.gov
• Agency Program Page: USGS: Water Resources of the United States: http://water.usgs.gov
• Agency Data Series Page: http://qwwebservices.usgs.gov