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Geologic Radon Potential Map of the United States Geologic Radon Potential Map of the United States
Radon is an odorless and invisible radioactive gas that is naturally released from rocks, soil, and water. According to the U.S. Environmental Protection Agency (EPA) and the U.S. Surgeon General, radon is the second leading cause of lung cancer in the United States. Recent epidemiological studies have also identified linkages between radon exposure and cerebrovascular diseases including...
Potential Explanatory Variables for Groundwater Quality in California Potential Explanatory Variables for Groundwater Quality in California
This data release codifies and attributes values for potential explanatory factors to groundwater well locations and to groundwater basins in California. The groundwater sites are 282,000 wells that have water-quality data and are listed in the California State Water Resources Control Boards' Groundwater Ambient Monitoring and Assessment Program Groundwater Information System (GAMA GIS)...
Estimation of Annual and Monthly Loads of Nitrate + Nitrite, Total Phosphorous, and Dissolved Phosphorus in Illinois for Water Years 1974 to 2022 Estimation of Annual and Monthly Loads of Nitrate + Nitrite, Total Phosphorous, and Dissolved Phosphorus in Illinois for Water Years 1974 to 2022
This data release contains data in support of "Diverging trends in Nitrate and Phosphorus Loads and Yields Across Illinois Watersheds, 1997–2022" (Kamrath and others, 2025). It contains input and output data used to estimate total nitrate + nitrite, dissolved phosphorous and total phosphorous loads for sites in Illinois from water years 1974 to 2022. The input data includes "input-data...
Physical, chemical, and biological results from a Lagrangian study of water and sediment transported by Powder River in central Wyoming and southeastern Montana, between June 27 – July 3, 2019 Physical, chemical, and biological results from a Lagrangian study of water and sediment transported by Powder River in central Wyoming and southeastern Montana, between June 27 – July 3, 2019
A Lagrangian study was conducted in 2019 that followed two water masses in the Powder River from central Wyoming to southeastern Montana. The study characterized the changes of the in-stream transport of sediment and associated chemical and biological constituents. Depth-integrated water samples (using an isokinetic nozzle) and river bottom sediment samples were collected at six mainstem...
Annual Estimates of Suspended Sediment Concentration and Load to Support Trend Analysis on the Lower Mississippi River and Atchafalaya River, 1978–2021 Annual Estimates of Suspended Sediment Concentration and Load to Support Trend Analysis on the Lower Mississippi River and Atchafalaya River, 1978–2021
This data release contains annual estimates of total, fine (
Groundwater-level altitudes and volatile and semivolatile organic compound concentrations at the Petro-Chemical Systems, Inc. (Turtle Bayou) Superfund site, Liberty County, Texas, 2024 Groundwater-level altitudes and volatile and semivolatile organic compound concentrations at the Petro-Chemical Systems, Inc. (Turtle Bayou) Superfund site, Liberty County, Texas, 2024
The U.S. Geological Survey (USGS), in cooperation with the U.S. Environmental Protection Agency (EPA), collected groundwater-level altitude and water-quality data from selected monitoring wells at the Petro-Chemical Systems, Inc. (Turtle Bayou) Superfund site in Liberty County, Texas on April 29 and November 13, 2024. These data were collected to obtain information that could be used to...