Kara Mayer’s mission is to make river swimming around NewYork City safe and free. With her development of + POOL, a water-filtering floating pool for safe recreation in urban waters, she has ignited a series of policy changes that will open up access to the rivers for all New Yorkers. Thisis being trialled in the Summer of 2025, and the implications of her work for outdoor urban bathing are huge, in terms of policy, technology and knowhow. Her moto – perseverance– is one for all water quality advocates. In this podcast we discuss how the idea of the world’s first  floating filtration pool came about, and how she has persevered in bringing this to fruition.