ATSDR's Hazardous Substance Release and Health Effects
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
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).
More information on GSQL may be found in NCSA's Tutorial on GSQL.
Query and Search the HazDat Database
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 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.
Page updated October 5, 2004
Lori Franklin / e-mail