The iodine-131 dose that Hanford area residents received depended on several factors, including age at the time of the release and where they lived. The following map shows the 10-rad dose area for children who were 0–4 years of age and 5–19 years of age in 1945 and during 1946– 1951. The four tables list the towns within those exposure areas for the different age groups and periods of iodine-131 releases.