During 1954-1956 samples of fat tissue from 227 people were analyzed for DDT and DDE and the results tabulated according to the dietary, environmental, and occupational exposure of these people to DDT. Also, 45 samples of fat from those surveyed as well as 70 samples of fat and other tissues from 17 other people were used for other purposes. Thus, 342 samples in all were analyzed. There has apparently been no progression in the storage of DDT in the general population of the United States since this storage was first measured in 1950. Persons abstaining from meat deposited in their fat only about half the concentration of DDT (2.3 ppm) as did people in the general population 4.9.