Epic Cleantec Launches OneWater Rain System, Expanding Portfolio of Smart Water Reuse Solutions

The new system captures and recycles rainwater and HVAC condensate onsite, helping developers and property owners cut costs, meet sustainability goals and future-proof their projects.

Epic Cleantec, a pioneer in onsite water reuse solutions for the real estate industry, unveiled its next-generation OneWater™ Rain system recently at Greenbuild 2025 in Los Angeles, marking a major step forward in water technology innovation.

The OneWater Rain system is an advanced, modular water recycling solution that captures and purifies rainwater and HVAC condensate for reuse across a range of non-potable applications, including for irrigation, toilet flushing, cooling tower makeup and laundry.By transforming these overlooked water sources into a sustainable supply, the system helps developers and property owners reduce utility costs, achieve sustainability goals and strengthen resilience against drought and infrastructure strain.

Rainwater reuse represents one of the most accessible and impactful decentralised water strategies in North America. Numerous studies across the U.S. and Canada have shown that capturing and reusing rainwater can offset 20–40% of a building’s total non-potable water demand, depending on local rainfall and end use. Beyond reducing reliance on municipal supply, rainwater systems help mitigate urban flooding, lower combined sewer overflow risks and improve overall water resilience.

Similarly, individual properties can waste hundreds of thousands of gallons of HVAC condensate annually. The OneWater Rain system captures these largely untapped flows and converts them into high-quality recycled water that supports both environmental performance and financial returns.

Engineered for flexibility, the OneWater Rain is designed to integrate seamlessly into both new construction or retrofit projects, making advanced water reuse accessible to a wider range of developments than ever before. The system’s plug-and-play modular architecture minimises installation time and space requirements, while its sophisticated AI-enabled operating platform continuously optimises treatment, storage and reuse in real time for maximum efficiency and reliability.

Water is the next frontier in sustainable buildings. With the OneWater Rain solution, we’re giving developers and building owners a tool to capture value from every drop — turning waste into savings and compliance into opportunity.

Aaron Tartakovsky, Co-founder and CEO of Epic Cleantec

Epic has already secured contracts to install the first OneWater Rain systems in developments in California and Texas, supporting state-level efforts to strengthen water security in drought-prone regions. These early projects showcase how circular water practices can deliver cost savings, operational resilience and environmental impact.

The OneWater Rain system builds on the success of Epic’s flagship OneWater platform, which includes award-winning greywater and blackwater solutions recognised as both a TIME Best Invention and a Fast Company World Changing Idea. Together, these technologies form a powerful ecosystem that allows buildings to reuse up to 95% of their water onsite, driving a new standard for sustainability in the built environment.

About Epic Cleantec
Epic Cleantec is a water reuse technology company based in San Francisco, CA with offices in San Diego, Austin, Las Vegas and Scottsdale. The company deploys onsite water treatment and reuse systems into individual buildings, groups of buildings and at the community scale, converting wastewater into treated water for non-potable uses, organic soil amendments and recovered heat energy. Born out of initial work with the Bill and Melinda Gates Foundation’s “Reinvent the Toilet Challenge,” Epic is now trusted by leading players in real estate across North America. The company has been featured in The New York Times, CNBC, CNN, The Wall Street Journal, WIRED, Fast Company and TechCrunch, among others; was recognised as one of Inc.’s Best Workplaces of 2024 and 2025; was named to TIME’s Best Inventions of 2022 and 2023; and is a Fast Company 2023 Most Innovative Companies Award winner.

Learn more at epiccleantec.com.