Search datasets
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USEPA National Aquatic Resource Surveys 2008-9 and 2013-14 Physical Habitat and Landscape data for Rivers and Streams (NRSA). Daily flow and peak flow from the National Water Information System...
Search relevance: 160.33 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
Surface water monitoring data from national aquatic surveys (lakes, streams, rivers). This dataset is associated with the following publication: Stoddard , J., J. Van Sickle, A. Herlihy, J....
Search relevance: 144.93 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:52 PM -
Data are from 1,000 river and stream sites across the conterminous US where consistent biological, chemical, physical and watershed data were gathered. The sites were selected using a probability...
Search relevance: 134.79 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 06:52 PM -
National Lakes Assessment 2012 Datafiles for Report “National Lakes Assessment 2012: A Collaborative Survey of lakes in the United States”: The National Lakes Assessment (NLA) is a statistical...
Search relevance: 55.75 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 07:00 PM -
National Lakes Assessment 2007 Datafiles for Report “National Lakes Assessment: A Collaborative Survey of the Nation’s Lakes”: The National Lakes Assessment (NLA) is a statistical survey of the...
Search relevance: 55.43 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 07:00 PM -
The National Wetland Condition Assessment (NWCA) is a statistical survey of the condition of wetlands in the conterminous United States. It is designed to provide information on the extent of...
Search relevance: 54.77 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 07:00 PM -
The National Rivers and Streams Assessment (NRSA) is a statistical survey of the condition of our nation's perennial rivers and streams. It is designed to provide information on the extent of...
Search relevance: 54.25 | Views last month: 4 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
The National Wetland Condition Assessment (NWCA) is a statistical survey of the condition of wetlands in the conterminous United States. It is designed to provide information on the extent of...
Search relevance: 54.23 | Views last month: 8 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
National Coastal Condition Assessment 2015 Datafiles for Report “National Coastal Condition Assessment: A Collaborative Survey of the Nation's Estuaries and Nearshore Great Lakes”: The National...
Search relevance: 54.04 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 07:00 PM -
The National Lakes Assessment (NLA) is a statistical survey of the condition of our nation's lakes, ponds, and reservoirs. It is designed to provide information on the extent of lakes that support...
Search relevance: 53.88 | Views last month: 7 | Catalog Last Checked: September 10, 2026 at 07:00 PM -
The National Rivers and Streams Assessment (NRSA) is a statistical survey of the condition of our nation's perennial rivers and streams. It is designed to provide information on the extent of...
Search relevance: 53.85 | Views last month: 6 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
The National Wetland Condition Assessment (NWCA) is a statistical survey of the condition of wetlands in the conterminous United States. It is designed to provide information on the extent of...
Search relevance: 53.73 | Views last month: 3 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
The National Rivers and Streams Assessment (NRSA) is a statistical survey of the condition of our nation's perennial rivers and streams. It is designed to provide information on the extent of...
Search relevance: 52.54 | Views last month: 7 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
Stable Isotope Ratios of Nitrate from the National Aquatic Resource Survey 2023 and 2024. We analyzed 163 samples with nitrate concentrations above 2 mg-N/L for oxygen and nitrogen isotopes of...
Search relevance: 49.93 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 07:02 PM -
This GIS dataset offers a link to the California portion of the Nonindigenous Aquatic Species (NAS) information resource for the United States Geological Survey. The NAS program has been...
Search relevance: 47.96 | Views last month: 21 | Catalog Last Checked: October 24, 2026 at 08:47 PM -
The National Lakes Assessment (NLA) is a statistical survey of the condition of our nation's lakes, ponds, and reservoirs. It is designed to provide information on the extent of lakes that support...
Search relevance: 43.35 | Views last month: 37 | Catalog Last Checked: September 10, 2026 at 07:01 PM -
Stream N and other water chemistry measurements originate from three national-scale, randomized, unequally weighted probability surveys of the U.S. EPA's National Rivers and Streams Assessment...
Search relevance: 39.89 | Views last month: 0 | Catalog Last Checked: September 10, 2026 at 06:59 PM -
Data from the National Aquatic Resource Surveys: The following data are available for download as comma separated values (.csv) files. Sort the table using the pull down menus or headers to more...
Search relevance: 38.22 | Views last month: 1 | Catalog Last Checked: September 10, 2026 at 06:53 PM -
NRSA is part of EPA’s National Aquatic Resource Surveys which samples different surface waters on a 5-year cycle during the growing season. For logistical reasons, each NRSA cycle occurs over 2...
Search relevance: 35.29 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 06:59 PM -
The Southeast Coast Network (SECN) initiated a pilot program using Visual Encounter Surveys (VES) and Automated Recording Devices (ARDs) to monitor amphibians and reptiles (collectively “herps”)...
Search relevance: 29.59 | Views last month: 13 | Catalog Last Checked: November 12, 2026 at 02:57 AM
