National Recommended Water Quality Criteria

The National Recommended Water Quality Criteria is a compilation of national recommended water quality criteria for the protection of aquatic life and human health in surface water for approximately 150 pollutants. These criteria provide guidance for states and tribes to use in adopting water quality standards.

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EPA Sole Source Aquifers

Information on sole source aquifers (SSAs) is widely used in assessments under the National Environmental Policy Act and at the state and local level. A national layer, including all available SSA coverages, is available for use in GIS. This layer includes the GIS polygons for SSAs. In addition to single SSA designated area polygons, some […]

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Superfund Site Information

This asset includes a number of individual data sets related to site-specific information for Superfund, which is governed under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) of 1980, which was amended by the Superfund Amendments and Reauthorization Act (SARA) in 1986. The Superfund Enterprise Management System (SEMS) contains basic site description, location, schedule […]

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Evaluation of the immunomodulatory effects of 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)-propanoate (“GenX”) in C57BL/6 mice

Raw data file outputs of serum and urine measurements of GenX in dosed rodents. This dataset is associated with the following publication: Rushing, B., Q. Hu, J. Franklin, R. McMahen, S. Dagnino, C. Higgins, M. Strynar, and J. DeWitt. Evaluation of the Immunomodulatory Effects of 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)-propanoate (“GenX”) in C57BL/6 Mice. ENVIRONMENTAL TOXICOLOGY. John Wiley & […]

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SDWISFED Drinking Water Data

SDWIS/FED is EPA’s national regulatory compliance database for the drinking water program. It includes information on the nation’s 160,000 public water systems and violations of drinking water regulations. Access aggregated information on all violations reported in an EPA region, state, and county since 1993 using the MS Excel PivotTables. These multidimensional tables contain aggregated information […]

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Seven-Day Low Streamflows in the United States, 1940-2014

This map shows percentage changes in the minimum annual rate of water carried by rivers and streams across the country, based on the long-term rate of change from 1940 to 2014. Minimum streamflow is based on the consecutive seven-day period with the lowest average flow during a given year. Blue triangles represent an increase in […]

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EPA Facility Registry Service (FRS): TRI

This web feature service contains location and facility identification information from EPA’s Facility Registry Service (FRS) for the subset of facilities that link to the Toxic Release Inventory (TRI) System. TRI is a publicly available EPA database reported annually by certain covered industry groups, as well as federal facilities. It contains information about more than […]

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