The Hanford Thyroid Disease Study

HTDS is a study of thyroid disease among people who were exposed to radioactive iodine (iodine-131) from the Hanford Nuclear Site in Washington State. The exposures occurred from 1944 through 1957.

The question of the study was, “Did exposure to iodine-131 from Hanford result in increased incidence of thyroid disease?”

CDC and the Fred Hutchinson Cancer Research Center released the Final Report in June 2002.


Map of Hanford

HTDS at a Glance

A 3 page summary of the HTDS Final Report.

Downloadpdf icon [PDF – 503kb]

El Resumen de HTDS en español

Downloadpdf icon [PDF – 507kb]

HTDS Guide

Detailed information about how the study was conducted and the findings.

Go to HTDS Guide

HTDS Technical Report

Download a copy of the complete technical report

Download Now [PDF – 25M]
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Public Presentation

Video interviews with HTDS research team now available.

Go to Video

Page last reviewed: January 6, 2014