This all started back when we were working on our Guts show, and author Frederick Kaufman told us about getting sucked in to the mystery of what happens to poop in New York City. Robert and producer Pat Walters decided to take Fred's advice and pay a visit to the North River Wastewater Treatment Plant... which turned out to be just the beginning of a surprisingly far-ranging quest.
Want some more sewer fun?
Read: As Robert and Pat report, some of that sewer sludge made it out into the ocean. Wonder what happened to it?
Play: Try out our Poop Quiz:
For more information on sludge and it's complicated history with the EPA and other environmental groups, check out Rose George's book, "The Big Necessity; The Unmentionable World of Human Waste and Why it Matters".