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Nutrient and streamflow model-input data (1974-2016) and trend results...
Data provided in this release support the findings in Choquette et al. (2019), utilizing methods for evaluating water-quality and daily-streamflow trends described also in... -
Raster dataset showing the probability of detecting...
This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product... -
Water-quality data from four Indian Creek sites, Johnson County, Kansas,...
This U.S. Geological Survey (USGS) Data Release provides continuously measured water-quality data collected from four Indian Creek sites in Johnson County, Kansas during July... -
Spatial water-quality data for Indian Creek, Johnson County, Kansas, May 23,...
This U.S. Geological Survey (USGS) Data Release provides spatial water-quality data collected from Indian Creek in Johnson County, Kansas, on May 23, 2013, July 23, 2014, July... -
Water-quality and streamflow datasets used in Weighted Regressions on Time,...
In 1991, the U.S. Geological Survey (USGS) began a study of more than 50 major river basins across the Nation as part of the National Water-Quality Assessment (NAWQA) project.... -
Vulnerability of shallow ground water and drinking-water wells to nitrate in...
This data set represents the area of National Resources Inventory surface drainage, field ditch conservation practice, in square kilometers, in the conterminous United States.... -
Vulnerability of shallow ground water and drinking-water wells to nitrate in...
This data set represents the amount of clay sediment in the soil, in percent times 1000, in the conterminous United States. The data set was used as an input data layer for a... -
Vulnerability of shallow ground water and drinking-water wells to nitrate in...
This data set represents "water input," the ratio of the total area of irrigated land to precipitation, in square kilometers per centimeter, in the conterminous United States.... -
Nutrients, Escherichia coli, and microbial source tracking markers in...
Concerns exist that the degradation of water quality in Salado Creek near Salado, Texas could adversely affect recreational uses and harm salamander populations that live in and... -
Estimated nutrient and sediment concentrations from major rivers in Illinois...
During water years 2016–2021 (a water year begins on October 1 and ends on September 30 and is designated by the year in which it ends), the U.S. Geological Survey (USGS), in... -
Water-quality trends for rivers and streams in the Delaware River Basin...
The datasets provided here are the input data used to run the Seasonal Kendall Trend (SKT) tests and Weighted Regressions on Time, Discharge, and Season (WRTDS) models. SKT... -
Raster dataset showing the probability of elevated concentrations of nitrate...
This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product... -
Vulnerability of shallow ground water and drinking-water wells to nitrate in...
This data set represents the presence or absence of sandstone and carbonate rock aquifers in the conterminous United States. The data set was used as an input data layer for a... -
Raster dataset showing the probability of detecting...
This dataset is one of eight datasets produced by this study. Four of the datasets predict the probability of detecting atrazine and(or) desethyl-atrazine (a breakdown product... -
Discrete Carbonate System Parameter Measurements in Middle Tampa Bay,...
This dataset contains carbonate system data collected by scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center to investigate the... -
Water-quality trends for rivers and streams in the Delaware River Basin...
The datasets provided here are the output from the Seasonal Kendall Trend (SKT) test and Weighted Regressions on Time, Discharge, and Season (WRTDS) model that characterize... -
Vulnerability of shallow ground water and drinking-water wells to nitrate in...
This data set represents the percent of woody wetlands and emergent herbaceous wetlands land cover in the conterminous United States. The data set was used as an input data... -
Patterns of Diel Variation in Nitrate Concentrations in the Potomac River
This data set includes nitrate concentration, water temperature, and discharge collected every 15 minutes during Dec. 2011 - Nov. 2013 from the USGS gage at the Potomac River... -
Alaska Geochemical Database Version 3.0 (AGDB3) including best value data...
The Alaska Geochemical Database Version 3.0 (AGDB3) contains new geochemical data compilations in which each geologic material sample has one best value determination for each... -
Vulnerability of shallow ground water and drinking-water wells to nitrate in...
This data set represents saturation overland flow estimated by TOPMODEL, in percent of streamflow, in the conterminous United States. The data set was used as an input data...