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Hazardous Substance Release and Health Effects Database

NOTE: HazDat is no longer available. Please adjust your bookmarks.

HazDat was Agency for Toxic Substances and Disease Registry’s Hazardous Substance Release/Health Effects Database which contained scientific and administrative 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.

Find updated information on ATSDR’s activities at