Plato Malozemoff Distinguished Professor at UC Berkeley and co-founder of major research platforms including ReNUWIt and the National Alliance for Water Innovation, David Sedlak has spent three decades bridging environmental chemistry, treatment engineering and water policy. In this conversation, he discusses public trust, PFAS regulation, the quiet bottleneck of concentrate management, and why the future of water security may depend less on any single technology than on dismantling the institutional silos that keep drinking water, wastewater and stormwater artificially apart.