Menstuff® has compiled the following information on DDT and the federal government standards on basically any chemical.
Click on the photo, then read the description below.
Buzzing around on the sand, young bathers at Jones Beach, New
York, race towards clouds of DDT sprayed across the beach in
1945. Used to eradicate flies and malaria-carrying mosquitoes, the
pesticide was later found to be harmful, despite the reassurances on
this truck's sign. Because of its longterm effects on wildlife,
DDT was banned for general use in the United States in 1972. The
sign reads: "D.D.T. Powerful insecticide harmless to humans.
Applied by Todd Insect Fog Applicators. Nausau County Extermination
Comm. L.I. State Park Comm."
Source: National Geographic Swim Suits: 100 years of pictures, April 28, 2003
The progress of science is strewn, like an ancient desert trail, with the bleached skeleton of discarded theories which once seemed to possess eternal life. - Arthur Koestler