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The data collected and the techniques used by USGS scientists should conform to or reference national and international standards and protocols if they exist and when they are relevant and appropriate. For datasets of a given type, and if national or international metadata standards exist, the data are indexed with metadata that facilitates access and integration.
Access maps of watershed nutrient contributions to the Nation's Estuaries and Great Lakes
View the geographic distribution of estimated use of numerous pesticides on agricultural land in the conterminous United States. A graph accompanies each map, which shows annual national use by major crop for the mapped pesticide for each year during the period.
An online graphical data tool provides annual summaries of nutrient and sediment concentrations and loads and streamflow information for 106 sites monitored as part of the USGS National Water-Quality Network for Streams and Rivers.
A single point of access for all geoscience data published by the U.S. Geological Survey Coastal and Marine Geology Program (CMGP).
The USGS Geo Data Portal (GDP) project provides scientists and environmental resource managers access to downscaled climate projections and other data resources that are otherwise difficult to access and manipulate. This user interface demonstrates an example implementation of the GDP project web-service software and standards-based data integration strategy.
ScienceBase provides access to aggregated information derived from many data and information domains, including feeds from existing data systems, metadata catalogs, and scientists contributing new and original content.
Are you looking for data for today, in the past, or what might happen in the future? Discover USGS Water Data resources here!
Estimated Secchi-disk transparency (eSDT) and corresponding estimated trophic state index (eTSI) values.
Data is available for download in shapefile format with metadata: 2003-2005 eSDT
Estimated Secchi-disk transparency (eSDT) and corresponding estimated trophic state index (eTSI) values.
Data is available for download in shapefile format with metadata: 2013 eSDT
Estimated Secchi-disk transparency (eSDT) and corresponding estimated trophic state index (eTSI) values.
Data is available for download in shapefile format with metadata: 1999-2000 eSDT
Estimated Secchi-disk transparency (eSDT) and corresponding estimated trophic state index (eTSI) values.
Data is available for download in shapefile format with metadata: 2009-2010 eSDT
