Rob Walters, Three Rivers P.I.

  • Rob Walters, the Three Rivers Waterkeeper, and his dog Rio, patrol the Ohio River near the West End Bridge, Pittsburgh, Pennsylvania, May 21, 2015. Photo: Lou Blouin

"Our Three Rivers" Audio Postcard No. 1

Rob Walters isn't a vigilante. But he doesn't mind the term private investigator. Every week, he patrols up and down Pittsburgh's Three Rivers in a flat bottom boat, just to make sure everything on the water is as it should be. Some days, it's as simple as responding to a call from a local fisherman who's found something dumped in his favorite fishing spot. Other times, he's out to catch bigger fish. He doesn't work for the EPA or any government agency. In fact, in his words, he's sort of a "Plan B" for the government, when lack of manpower or politics muddy enforcement of the Clean Water Act.

This audio postcard is part of a new series, "Our Three Rivers," which explores residents' unique relationships to the Allegheny, Monongahela and Ohio Rivers. Read more about Rob and the Three Rivers Waterkeeper organization at