The spreadsheet contains mineralogical and solubility data for the uranyl minerals: metaschoepite and uranophane. This dataset is associated with the following publication: Stanley, D.M., and R.T. Wilkin. Solution equilibria of uranyl minerals: Role of the common groundwater ions calcium and carbonate. JOURNAL OF HAZARDOUS MATERIALS. Elsevier Science Ltd, New York, NY, USA, 377: 315-320, (2019).

The dataset includes X-ray Diffraction, Raman spectroscopic, X-ray absorption spectroscopic, and aqueous data pertaining to the paper titled "Uptake of nickel by synthetic mackinawite" published in Chemical Geology (2017, volume 462, pages 15-29. This dataset is associated with the following publication: Wilkin, R., and D. Beak. Uptake of Nickel by Synthetic Mackinawite. CHEMICAL GEOLOGY. Elsevier Science Ltd, New York, NY, USA, 462: 15-29, (2017).

The dataset includes X-ray Diffraction, Raman spectroscopic, X-ray absorption spectroscopic, and aqueous data pertaining to the paper titled "Uptake of nickel by synthetic mackinawite" published in Chemical Geology (2017, volume 462, pages 15-29. This dataset is associated with the following publication: Wilkin, R., and D. Beak. Uptake of Nickel by Synthetic Mackinawite. CHEMICAL GEOLOGY. Elsevier Science Ltd, New York, NY, USA, 462: 15-29, (2017).

The dataset provides information on chromium concentrations extracted from rock samples collected at the Garfield SF site in New Jersey (USA). The data are discussed in Zhao et al. (2017). Chemical Geology, v. 474, p. 1-8. This dataset is associated with the following publication: Zhao, J., T. Al, S. Chapman, B. Parker, K. Mishkin, D. Cutt, and R. Wilkin. Determination of Cr(III) solids formed by reduction of Cr(VI) in a contaminated fractured bedrock aquifer: evidence for natural attenuation of Cr(VI). CHEMICAL GEOLOGY. Elsevier Science Ltd, New York, NY, USA, 474: 1-8, (2017).

The dataset provides information on chromium concentrations extracted from rock samples collected at the Garfield SF site in New Jersey (USA). The data are discussed in Zhao et al. (2017). Chemical Geology, v. 474, p. 1-8. This dataset is associated with the following publication: Zhao, J., T. Al, S. Chapman, B. Parker, K. Mishkin, D. Cutt, and R. Wilkin. Determination of Cr(III) solids formed by reduction of Cr(VI) in a contaminated fractured bedrock aquifer: evidence for natural attenuation of Cr(VI). CHEMICAL GEOLOGY. Elsevier Science Ltd, New York, NY, USA, 474: 1-8, (2017).

The dataset contains chromatographic traces of samples containing thioarsenic species and solubility data for disordered orpiment (arsenic sulfide). This dataset is associated with the following publication: Wilkin, R.T., R.G. Ford, L.M. Costantino, R.R. Ross, D.G. Beak, and K.G. Scheckel. Thioarsenite Detection and Implications for Arsenic Transport in Groundwater. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 53(20): 11684-11693, (2019).

The dataset includes groundwater information for: water stable isotopes, As concentrations, Se concentrations, and spectroscopic scans. This dataset is associated with the following publication: Wilkin, R.T., T. Lee, D. Beak, R. Anderson, and B. Burns. Groundwater Co-Contaminant Behavior of Arsenic and Selenium at a Lead and Zinc Smelting Facility. APPLIED GEOCHEMISTRY. Elsevier Science Ltd, New York, NY, USA, 89: 255-264, (2018).

This data release contains two spatial datasets and a data table in support of an evaluation of arsenic and uranium occurrence in Connecticut groundwater through spatially weighted and bedrock geology assessments. Spatial datasets include 1) a shapefile of 130 equal-area grid cells with associated arsenic attribute data, and 2) a shapefile of 110 equal-area grid cells with associated uranium attribute data. The State of Connecticut was divided based on a set of randomized equal-area grid cells based on the method of Scott (1990); one grid was created for arsenic, with 130 grid cells, and one was created for uranium, with 110 grid cells. Arsenic and uranium attribute data associated with the equal-area grid cells include the number of wells in each grid cell, the number of wells with constituent concentrations above three selected thresholds, the fraction of wells with constituent concentrations above three selected thresholds, and the percentage of wells with constituent concentrations above three selected thresholds. The three selected thresholds for arsenic include 3, 5, and 10 micrograms per liter (ug/L), with 10 ug/L representing the maximum contaminant level (MCL) established by the U.S. Environmental Protection Agency (EPA) for human health for arsenic. The three selected thresholds for uranium include 1, 10, and 30 ug/L, with 30 ug/L representing the EPA MCL for human health for uranium. The bedrock geology data table is table 4 from Gross and others (2020) formatted so that it can easily be joined with Connecticut's bedrock geology dataset (Connecticut Department of Environmental Protection, 2000) using the geologic unit abbreviation (UNIT attribute) in order to recreate figure 3 from Gross and others (2020). The data table includes counts and percentages of arsenic and uranium concentrations that exceed maximum contaminant levels from private wells in Connecticut, by geologic unit and major bedrock category, 2013-18.

This data release contains the U.S. salient statistics and world production data extracted from the ARSENIC data sheet of the USGS Mineral Commodity Summaries 2025.

This data release contains the U.S. salient statistics and world production data extracted from the ARSENIC data sheet of the USGS Mineral Commodity Summaries 2025.