N.O. Water not as bad

However --

In some spots, including Claiborne Avenue and Audubon Boulevard in New Orleans, pesticides were found in the sediment samples. Many of the pesticides found, such as chlordane, Dieldrin and DDT, are banned.

Piehler said pesticides at those levels are not a concern unless someone ingests them "for long periods of time."

But he said it's notable that the pesticides were found even though they have been banned.

So how did they get there?