EPA appointed Administrative Law Judge Edmund Sweeney to evaluate DDT. In 1971-2 he conducted a seven-month hearing. EPA actually participated, testifying against DDT!
Judge Sweeney, after 80 days of testimony from 150 expert scientists, ruled that DDT “is not a carcinogenic, mutagenic, or teratogenic hazard to man” and does “not have a deleterious effect on freshwater fish, estuarine organisms, wild birds, or other wild life. There is a present need for the continued use of DDT for the essential uses defined in this case.”