Search datasets
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As part of the U.S. Geological Survey's National Water-Quality Assessment Program, an investigation of the Yellowstone River Basin study unit is being conducted to document status and trends...
Search relevance: 141.88 | Views last month: 0 | Catalog Last Checked: May 05, 2026 at 08:43 PM -
This is a coverage of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in the conterminous United States,...
Search relevance: 94.57 | Views last month: 1 | Catalog Last Checked: June 09, 2026 at 11:47 PM -
This is a coverage of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in the conterminous United States,...
Search relevance: 94.22 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 08:39 PM -
This dataset represents sediment quality measurements that were taken in Canaveral National Seashore during 2009 as a part of the marine water and sediment quality assessment protocol that was...
Search relevance: 87.92 | Views last month: 0 | Catalog Last Checked: March 26, 2026 at 09:04 PM -
This dataset represents sediment quality measurements that were taken in Cumberland Island National Seashore during 2007 as a part of the marine water and sediment quality assessment protocol that...
Search relevance: 84.95 | Views last month: 0 | Catalog Last Checked: March 26, 2026 at 09:06 PM -
This dataset represents sediment quality measurements that were taken in Fort Pulaski National Monument during 2007 as a part of the marine water and sediment quality assessment protocol that was...
Search relevance: 84.13 | Views last month: 0 | Catalog Last Checked: March 26, 2026 at 09:03 PM -
This dataset represents sediment quality measurements that were taken in Timucuan Ecological and Historic Preserve during 2008 as a part of the marine water and sediment quality assessment...
Search relevance: 79.50 | Views last month: 0 | Catalog Last Checked: March 26, 2026 at 09:03 PM -
High concentrations of uranium were detected in samples from wells used for domestic drinking water supplies in the San Joaquin Valley. Of 163 domestic wells sampled by the California Groundwater...
Search relevance: 77.54 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 08:28 PM -
In 2004, the Environmental Protection Agency (EPA) Environmental Monitoring and Assessment Program (EMAP) National Coastal Assessment (NCA), coordinated through the Gulf Ecology Division,...
Search relevance: 75.37 | Views last month: 5 | Catalog Last Checked: May 29, 2026 at 06:18 PM -
This data set is a national map of predicted probability of nitrate contamination of shallow ground waters based on a logistic regression (LR) model. The LR model was used to predict the...
Search relevance: 72.65 | Views last month: 5 | Catalog Last Checked: June 09, 2026 at 11:30 PM -
This dataset includes a subset of previously released pesticide data (Morace and others, 2020) from the U.S. Geological Survey (USGS) National Water Quality Assessment Program (NAWQA) Regional...
Search relevance: 56.05 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 09:16 PM -
Ecological assessment data from the USGS National Water-Quality Assessment Program and the USEPA National River and Stream Assessment were reviewed and records were retained from sampling sites...
Search relevance: 54.48 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 10:11 PM -
The Micronutrients Measurement Quality Assurance Program (MMQAP) was coordinated by the Chemical Sciences Division and supported measurement technology for selected fat- and water-soluble vitamins...
Search relevance: 53.60 | Views last month: 0 | Catalog Last Checked: August 02, 2025 at 02:01 PM -
The National Water Quality Network (NWQN) for Rivers and Streams includes 113 surface-water river and stream sites monitored by the U.S. Geological Survey (USGS) National Water Quality Program,...
Search relevance: 51.82 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 10:16 PM -
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,...
Search relevance: 51.75 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 08:18 PM -
The National Water Quality Network (NWQN) for Rivers and Streams includes 111 surface-water river and stream sites monitored by the U.S. Geological Survey (USGS) National Water Quality Program,...
Search relevance: 51.57 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 09:04 PM -
The National Water Quality Network (NWQN) for Rivers and Streams includes 113 surface-water river and stream sites monitored by the U.S. Geological Survey (USGS) National Water Quality Program,...
Search relevance: 51.57 | Views last month: 1 | Catalog Last Checked: May 05, 2026 at 10:15 PM -
Analytical recovery is the concentration of an analyte measured in a water-quality sample expressed as a percentage of the known concentration added to the sample (Mueller and others, 2015)....
Search relevance: 51.39 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 09:26 PM -
In 2004, the Environmental Protection Agency (EPA) Environmental Monitoring and Assessment Program (EMAP) National Coastal Assessment (NCA), coordinated through the Gulf Ecology Division,...
Search relevance: 51.03 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 09:24 PM -
This is a GENERALIZED version of the boundaries and codes used for the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program Study-Unit investigations in the conterminous...
Search relevance: 50.85 | Views last month: 2 | Catalog Last Checked: June 09, 2026 at 11:57 PM
