Nutrient loads to the Gulf of Mexico produced by the USGS National Water Quality Network, 1968-2021

Note: this data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P1MFARP2

The National Water Quality Network (NWQN) for Rivers and Streams includes 110 surface-water river and stream sites monitored by the U.S. Geological Survey (USGS) National Water Quality Program. This data release provides streamflow, nutrient, and sediment data collected and analyzed by NWQN for sites used to represent contributions to the Gulf of Mexico from 1968-2021. This dataset includes daily, monthly, and annual summaries of streamflow conditions, discrete water-quality concentrations, annual water-quality loads, and information on water-quality trends. Data from this release will be presented on the USGS ScienceBase platform.