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Data Releases

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.

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Data from Decadal Change in Groundwater Quality Web Site, 1988-2018 Data from Decadal Change in Groundwater Quality Web Site, 1988-2018

Evaluating Decadal Changes in Groundwater Quality: Groundwater-quality data were collected from 5,000 wells between 1988-2001 (first decadal sampling event) by the National Water-Quality Assessment Project. Samples are collected in groups of 20-30 wells with similar characteristics called networks. About 1,500 of these wells in 67 networks were sampled again approximately 10 years later...
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Water Resources Mission Area

Soil-Water Balance model for alluvial deposits in Summerset, South Dakota Soil-Water Balance model for alluvial deposits in Summerset, South Dakota

A Soil-Water Balance (SWB) model of the alluvial aquifer in north Summerset, South Dakota, was constructed to estimate recharge and potential evapotranspiration volumes and rates for 2017-19. The model area included the northern part of the city of Summerset in west South Dakota along the east range of the Black Hills. The model area was defined as a rectangular area that included the...
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Water Resources Mission Area, Dakota Water Science Center

Environmental DNA robotic and manual sampling data, Yellowstone and Snake Rivers, 2017-2019 Environmental DNA robotic and manual sampling data, Yellowstone and Snake Rivers, 2017-2019

Environmental DNA detection results from samples collected using autonomous water sampling robots and manual approaches. Samples were collected in the Upper Yellowstone River (Montana) and Upper Snake River (Idaho/Wyoming) in 2018 and 2019. Samples were tested for the DNA of the following species: the waterborne protozoa Naegleria spp., the fish pathogen Tetracapsuloides bryosalmonae...
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Northern Rocky Mountain Science Center

PCR results from dreissenid mussel round robin assay analyses, 2018-2019 PCR results from dreissenid mussel round robin assay analyses, 2018-2019

Real-time PCR results of a round robin evaluation of 5 assays that target dreissenid mussel DNA. Water samples collected from waters with and without dreissenid mussels were analyzed using these five assays in four USGS laboratories. Samples from waters without dreissenid mussels were spiked with known amounts of dreissend DNA.
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Northern Rocky Mountain Science Center

Rock and Calcite Chemistry Within and Surrounding Fort Stanton-Snowy River Cave Rock and Calcite Chemistry Within and Surrounding Fort Stanton-Snowy River Cave

The Fort Stanton-Snowy River cave system (FSC) is located in Lincoln County, New Mexico in the upper Rio Hondo Basin. The entrance of the cave is on Bureau of Land Management (BLM) land near the site of historic Fort Stanton. In 2001, the Snowy River Formation was discovered. This formation, a white calcite deposit that lines a streambed within the cave, is now considered to be the...
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New Mexico Water Science Center

Georeferenced Maps of the Thickness of the Sparta Aquifer in MS, AR, and LA, 1961 to 1996 Georeferenced Maps of the Thickness of the Sparta Aquifer in MS, AR, and LA, 1961 to 1996

The Sparta aquifer is a primary source of groundwater in north-central Louisiana. In 2015, more than 60 million gallons per day were withdrawn from the Sparta aquifer, of which over 90 percent was used for public supply and industrial purposes (Collier, 2018). Concentrated withdrawals from the Sparta aquifer have caused regional water-level declines within the Sparta aquifer (McGee and...
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Lower Mississippi-Gulf Water Science Center
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