National Water Information System

National Water Information System
U.S. Government · Public domain · source
Name	National Water Information System
Country	United States
Managing agency	United States Geological Survey
Established	1975
Data types	streamflow, groundwater, water quality, water use, snowpack
Access	public

National Water Information System

The National Water Information System provides integrated hydrologic data for water-resources science and management across the United States. It aggregates observations from federal, state, tribal, and local networks to support agencies such as the United States Geological Survey, Environmental Protection Agency, National Oceanic and Atmospheric Administration, Federal Emergency Management Agency, and Bureau of Reclamation. Through standardized protocols and interoperable services, the program underpins research at institutions including the University of California, Berkeley, Massachusetts Institute of Technology, Colorado State University, and operational decision-making by entities like Metropolitan Water District of Southern California and Tennessee Valley Authority.

Overview

The system serves as a centralized repository for hydrologic observations including streamflow gages operated by the United States Geological Survey, groundwater well levels monitored by state geological surveys such as the California Department of Water Resources, and water-quality samples used by the Environmental Protection Agency for regulatory assessment. Data types encompass continuous records (streamflow, stage), periodic measurements (groundwater levels), and laboratory analyses (nutrients, contaminants) used by agencies including the United States Environmental Protection Agency and research programs at the Smithsonian Institution. The platform supports web services compliant with standards from organizations such as the Open Geospatial Consortium and the National Information Standards Organization to facilitate integration with models at laboratories like the National Center for Atmospheric Research and federal centers including the United States Army Corps of Engineers.

History and Development

Initial efforts to centralize hydrologic data trace to early 20th-century programs within the United States Geological Survey and collaborations with state water-resource agencies. The computational and telecommunications advances of the 1970s and 1980s—driven in part by federal initiatives like the Water Resources Data Act and the advent of standards promoted by the National Institute of Standards and Technology—enabled construction of a national data system. Subsequent modernization incorporated remote sensing from satellites such as those managed by the National Aeronautics and Space Administration and observational networks coordinated with the National Weather Service. Partnerships with research universities including University of Arizona, Iowa State University, and University of Washington fostered methods for digital data management, while procurement and interoperability guidance referenced procurement frameworks used by General Services Administration projects.

Data Collection and Methods

Field instrumentation includes streamgages, pressure transducers, multiparameter sondes, and automated samplers deployed and maintained by entities such as the United States Geological Survey field offices and state agencies including the Texas Water Development Board. Groundwater monitoring uses nested well installations from programs run by institutions like the United States Army Corps of Engineers and state geological surveys. Laboratory analyses for constituents rely on protocols from the Environmental Protection Agency and standards laboratories such as the National Institute of Standards and Technology. Remote measurements integrate snowpack telemetry from networks maintained with cooperation from the Natural Resources Conservation Service and satellite-derived products from Landsat and missions by the National Aeronautics and Space Administration. Quality assurance, metadata cataloging, and time-series validation employ practices recommended by the International Organization for Standardization and federal guidance from the Office of Management and Budget.

Data Products and Services

Public-facing services include daily streamflow graphs, groundwater-level hydrographs, water-quality tables, and downloadable time-series accessed through portals maintained by the United States Geological Survey and mirrored by state portals such as those from the California Water Boards. Machine-readable APIs, compliant with standards advocated by the Open Geospatial Consortium and the World Meteorological Organization, support integration with modeling frameworks at research centers like the Pacific Northwest National Laboratory and operational tools used by the Federal Emergency Management Agency for flood mapping. Specialized products include historical data archives used by the National Climatic Data Center and derived indices for drought monitoring used by the U.S. Drought Monitor coordinated with the National Integrated Drought Information System.

Applications and Uses

Stakeholders employ system outputs for flood forecasting by the National Weather Service, water-rights administration by state agencies such as the Idaho Department of Water Resources, reservoir operations by the Bureau of Reclamation, and ecosystem assessments used by the U.S. Fish and Wildlife Service. Researchers at institutions like Stanford University, Princeton University, and Yale University use the data to parameterize hydrologic models and evaluate climate impacts documented by the Intergovernmental Panel on Climate Change. Industry partners, including utilities like New York City Department of Environmental Protection and agricultural organizations such as the American Farm Bureau Federation, rely on these observations for operational planning and compliance reporting.

Governance and Administration

Administration is led by the United States Geological Survey in partnership with federal programs including the National Oceanic and Atmospheric Administration and state-level water-resource agencies. Steering committees draw membership from scientific bodies such as the National Academy of Sciences and policy coordination involves federal bodies like the Office of Science and Technology Policy. Data-sharing agreements reference legal frameworks including statutes administered by the Congress of the United States and policy instruments used by the Environmental Protection Agency. Budgeting and interagency resource allocation have involved appropriations reviewed by committees of the United States Senate Committee on Environment and Public Works and the United States House Committee on Science, Space, and Technology.

Challenges and Future Directions

Current challenges include aging field infrastructure maintained by state and local partners, data integration across heterogeneous observing systems involving organizations like the Federal Emergency Management Agency and the Natural Resources Conservation Service, and sustaining funding subject to annual appropriations by the Congress of the United States. Future directions emphasize increased use of remote sensing from agencies such as the National Aeronautics and Space Administration and enhanced interoperability through adoption of standards from the Open Geospatial Consortium and the World Meteorological Organization. Emerging priorities include supporting climate adaptation planning guided by findings of the Intergovernmental Panel on Climate Change, expanding partnerships with tribal nations and institutions like the Bureau of Indian Affairs, and leveraging advances in machine learning developed at centers such as the Massachusetts Institute of Technology and Carnegie Mellon University to improve real-time decision support.

Category:Hydrology Category:United States Geological Survey