Plus Pool is a crowd funded project which started on Kickstarter. The goal is to allow the people of New York to swim in the river water by filtering a small section making it clean and safe. 
As a crowd funded project, anyone can contribute toward the pool and there is even an incentive if you donate $200 you can have your name ingraved on a tile with a message up to 50 characters, there are even options to have graphics printed.
The aim is to sell all the tiles and reach a goal of $250,000. Once the target has been met the remaining $15-Million budget will be funded from various partners that have teamed up and gotten involed with the Plus Pool development.
This video from the Kickstarter team explains more about their project development and the work that has been put into making this dream a reality. Moreover the Plus Pool development could increase tourism and create an exciting atmosphere as many peeple will be intrigued with the concept of swiming in a floating pool on the river.