Agency for Toxic Substances and Disease Registry

Bromodichloromethane beakers and checmicals


Learn important information about 1,2-Dibromo-3-chloropropane.

Nathional Health Education

National Health Education Week 2018

Check out ATSDR's Case Studies in Environmental Medicine.

Choose Safe Places

Children’s Environmental Health Day

Choose Safe Places for Early Care and Education

ALS Registry Anniversary

The National ALS Registry

The National ALS Registry provides hope for patients and data for researchers.

PFAS toxprofile

New Perfluoroalkyls ToxProfile

Scientific resource about perfluoroalkyls is now available.

PFAS and Your Health

Per- and Polyfluoroalkyl Substances (PFAS) and Your Health

Learn more about PFAS, PFAS exposure, and PFAS health effects.

The Agency for Toxic Substances and Disease Registry (ATSDR), based in Atlanta, Georgia, is a federal public health agency of the U.S. Department of Health and Human Services. ATSDR protects communities from harmful health effects related to exposure to natural and man-made hazardous substances. We do this by responding to environmental health emergencies; investigating emerging environmental health threats; conducting research on the health impacts of hazardous waste sites; and building capabilities of and providing actionable guidance to state and local health partners.

Radiation in Medicine: Medical Imaging Procedures
Radiation in Medicine: Medical Imaging Procedures”
Medical imaging tests are non-invasive procedures that allow doctors to diagnose diseases and injuries without being intrusive. Some of these tests involve exposure to ionizing radiation, which can present risks to patients.

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Page last reviewed: November 13, 2018