National Water Information System (NWIS)

The National Water Information System (NWIS) is a comprehensive online platform maintained by the U.S. Geological Survey that provides real-time data on various aspects of the nation's water resources, such as streamflow, groundwater levels, and water quality. It aggregates measurements from thousands of monitoring sites across the country, making this information accessible to the public, researchers, policymakers, and water managers. NWIS helps track water trends, supports research, and guides decision-making to ensure sustainable water resource management and environmental protection.