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Data Sources


Toxicological Information
The contaminant data comes from the ATSDR iHazDat application and the Environmental Protection Agency’s (EPA) Exit WebMaps Toxic Release Inventory (TRI)  Exit WebMaps program.

Sites and Facilities Data
The hazardous waste site and facility data comes from the ATSDR iHazDat application which houses a subset of HazDat and the EPA TRI Exit WebMaps program.

HazDat, the Hazardous Substance Release/Health Effects Database, is the scientific and administrative database developed to provide access to information on the release of hazardous substances from Superfund sites or from emergency events and on the effects of hazardous substances on the health of human populations.

EPA TRI, the Environmental Protection Agency Toxic Release Inventory program contains information on toxic chemical releases and waste management activities reported annually by certain industries as well as federal facilities.

Environmental Health WebMaps uses a subset of the iHazDat data that includes active National Priority List sites and active ATSDR Petition sites and TRI data as an additional informational source.


GIS Mapping
The geographical mapping interface tools are provided by the ATSDR Geographic Research, Analysis and Services Program (GRASP).

Federal and State Programs
The program data comes from NCEH/ATSDR, NCEH/ATSDR funded, and other federal and state agencies programs. Some of the programs featured in Environmental Health WebMaps are the NCEH Lead Prevention program, Pediatric Environmental Health Specialty Unit program, and State Health Departments.

Public Health Resource Information
The resource information comes from NCEH/ATSDR. Users will have access to valuable resources including the ATSDR ToxFAQs™, Toxicological Profiles, and Public Health Assessments.

Toxic Release Inventory (TRI)
The TRI Exit WebMaps data is updated and maintained by the EPA Exit WebMaps . The EPA and state environmental agencies annually collect data from industrial facilities where a release or transfer of certain toxic chemicals has occurred.

Contact Us:
  • Agency for Toxic Substances and Disease Registry
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    Atlanta, GA 30341
  • 800-CDC-INFO
    (800-232-4636)
    TTY: (888) 232-6348
    Contact CDC-INFO
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    Closed Holidays
USA.gov: The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30329-4027, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO

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