OverviewThis layer provides location and facility information for sites found in the Superfund National Priorities List (NPL). The NPL lists national priorities among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States. The NPL is recorded in the Superfund Enterprise Management System (SEMS), which serves as a comprehensive inventory of active and archived hazardous waste sites evaluated by the Superfund program. To learn more about NPL visit the webpage.The Facility Registry Service (FRS) provides quality facility data to support EPA's mission of protecting human health and the environment by identifying and geospatially locating facilities, sites, or places subject to environmental regulations of environmental interest. Facility data is improved with geospatial processing of incoming data and data curation tools to provide an integrated, dataset to partners and the public through a variety of methods and products. For more detailed information about these facilities, use the FRS Query tool.Feature LayerSEMS_NPL Facilities: This web feature service contains location and facility identification information from EPA's Facility Registry Service (FRS) for the subset of facilities that are listed on the Superfund National Priorities List (NPL). This layer includes detailed facility information such as official facility names, physical addresses, geographic coordinates standardized to NAD83, and administrative jurisdiction details including city, county, and state. Additionally, the data includes unique identifiers like the EPA Facility Registry System Registry ID and Program System IDs, enhancing data integration and record uniqueness. Geographic CoverageThe data represent locations spanning all U.S. states, territories and tribal lands.Use CasesEnvironmental compliance monitoringHazardous site management and remediation planningPublic information and outreach regarding Superfund sitesIntegration into GIS applications for spatial analysis and reporting Additional InformationThe service includes links to program and facility-level web pages for more detailed resources and reports. Data quality is supported through precise geospatial location accuracy measurements and metadata on data collection methods and update timestamps. Users are advised to review the associated metadata for limitations and usage recommendations. The EPA places this data in the public domain, facilitating wide accessibility and use.