HazDat, the Agency for Toxic Substances and Disease Registry's 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. The following information is included in HazDat: site characteristics, activities and site events, contaminants found, contaminant media and maximum concentration levels, impact on population, community health concerns, ATSDR public health threat categorization, ATSDR recommendations, environmental fate of hazardous substances, exposure routes, and physical hazards at the site/event. In addition, HazDat contains substance-specific information such as the ATSDR Priority List of Hazardous Substances, health effects by route and duration of exposure, metabolites, interactions of substances, susceptible populations, and biomarkers of exposure and effects. HazDat also contains data from the U.S. Environmental Protection Agency (EPA) Comprehensive Environmental Response, Compensation, and Liability Information System (CERCLIS) database, including site CERCLIS number, site description, latitude/longitude, operable units, and additional site information.
Internet HazDat may be queried directly from a World-Wide Web Browser with Forms support by clicking on any one of the database queries listed below. This method of access to our relational database was made possible by GSQL, a simple forms interface to SQL databases, developed at the National Center for Supercomputing Applications (NCSA).
Internet HazDat data fields (or columns) are defined in the Internet HazDat Data Dictionary. You can also click on a column header in result tables to access the definition of a specific column.
ATSDR has conducted public health assessments at more than 1,650 sites, developed toxicological profiles for more than 180 substances on the ATSDR/EPA Priority List of Hazardous Substances, performed more than 6,000 health consultations, and conducted or funded more than 190 health studies. These activities have resulted in the publication of numerous Agency documents. Important information from these source documents has been abstracted into the Agency's HazDat database, and new information is added on a continuous basis. The information provided in Internet HazDat is updated at regular intervals.
HazDat contains data from the U.S. Environmental Protection Agency's CERCLIS database including site CERCLIS number, site description, latitude/longitude, operable units, and additional site information. This information allows the cross-referencing of hazardous waste sites with EPA databases.