Water Illumination develops a modular UV platform to completely destroy PFAS under ambient conditions
Per- and polyfluoroalkyl substances (PFAS) have rapidly evolved from an emerging contaminant concern to a central regulatory and public health priority. With legally binding limits established in the United States and regulatory frameworks expanding across Europe and Asia, utilities and industrial operators are reaching a critical tipping point.
For decades, common processing models have relied on adsorption and separation technologies such as granular activated carbon (GAC), ion exchange (IX), and reverse osmosis (RO). While these systems are effective at removing PFAS from water, they do not remove the compounds. Instead, it transfers contaminants to secondary waste streams where they must be recycled, incinerated, or disposed of. As regulatory oversight increases, the limitations of this containment-based approach are becoming increasingly apparent. Disposal costs are rising, liability exposures are widening, and the long-term fate of concentrated PFAS residues remains uncertain. The field is therefore moving from a philosophy of containment to a philosophy of permanent destruction.
California-based Water Illumination Inc. is developing a scalable ultraviolet (UV)-based destruction platform designed to directly degrade PFAS molecules under ambient conditions. By eliminating dependence on chemical additives and avoiding the generation of secondary waste, the company’s approach supports utilities and industries seeking a more sustainable and permanent path to compliance.
Addressing scaling challenges with UV-based chemistry
Many disruptive technologies show promising performance in controlled batch systems, but face significant barriers when scaled to meet ongoing real-world demands. Particularly in large volume water matrices, such as drinking water systems and water reuse facilities, where PFAS concentrations are typically in the nanogram per liter range, high energy consumption, operational complexity, and dependence on chemical reagents often limit economic feasibility.
Water Illumination designed the PolyClear™ platform specifically to address these scaling constraints. This system uses high-energy ultraviolet light to directly excite water molecules, generating reactive radical species in situ. Since the process relies on water itself as the reaction medium, no external oxidizing agent or auxiliary chemical reagents are required under the demonstrated operating conditions. This reduces system complexity and minimizes ongoing consumable costs.
UV platforms operate at ambient temperature and pressure, avoiding the infrastructure strain and increased operating costs associated with high-temperature or high-pressure fracture techniques. This design philosophy allows Water Illumination to target municipal and industrial applications where operational simplicity, energy efficiency, and predictable cost structures are essential.
UV-driven radical pathway for complete PFAS degradation
The core of Water Illumination’s technology is a UV-induced radical mechanism specifically tailored for the petrification of PFAS. When exposed to high-energy UV wavelengths, water undergoes photolytic reactions that produce reactive species that can break the carbon and fluorine bonds responsible for PFAS persistence.
This UV-driven pathway can convert long-, short-, and ultra-short-chain PFAS compounds into harmless end products such as free fluoride ions. By targeting the defining carbon-fluorine bonds common to PFAS chemistry, Water Illumination’s PolyClear™ platform addresses contaminants at the molecular level, rather than focusing solely on the individual species currently regulated.
Unlike traditional UV systems designed primarily for disinfection and traditional advanced oxidation processes, the PolyClear™ platform is designed to optimize energy distribution specifically for PFAS destruction. The unique reactor configuration ensures that reactive species are effectively produced and utilized within the processing volume, supporting efficient mineralization without the need for chemical additives. Additionally, the system operates within the ultraviolet spectrum, allowing for simultaneous microbial inactivation, providing dual functionality in a suitable water treatment environment.
Pilot verification under actual groundwater conditions
To validate performance under real-world operating conditions, Water Illumination partnered with Orange County Water Authority, one of the world’s leading public water agencies, to deploy the 100 W GEN1 PolyClear™ system. A six-week pilot study was conducted using PFAS-impacted groundwater to directly evaluate the system’s performance under real field conditions rather than laboratory simulations.
The GEN1 100 W PolyClear™ unit was designed for pilot scale operations at approximately 40 gallons per day and achieved up to 99.9% destruction of targeted PFAS compounds, including PFOA and PFOS. Analytical testing was performed using EPA Method 1633, a high-resolution mass spectrometry method that can quantify PFAS at ultratrace levels. The results demonstrated that they were not only below the U.S. Environmental Protection Agency’s maximum contaminant level of 4 ppt for regulated compounds, but also below the instrument detection limit of approximately 0.5 nanograms per liter for treated samples. Importantly, duplicate samples were independently analyzed by the district’s internal laboratory. The independently generated data was consistent with Water Illumination analysis results, adding an additional layer of validation for UV-based failure mechanisms.
Additionally, pilot data showed no measurable accumulation of short-chain PFAS under the test conditions, addressing a major regulatory concern related to incomplete degradation pathways.
Through this field validation, Water Illumination demonstrated that the PolyClear™ platform can operate effectively in dilute groundwater environments and other large volume water matrices. This capability is particularly important in drinking water and water reuse applications where PFAS concentrations are typically low and many disruptive technologies struggle to achieve economic feasibility.
Increase commercial throughput with PolyClear™ GEN2
Building on proven pilot system performance, Water Illumination is developing a second generation PolyClear™ platform (GEN2) designed to handle up to approximately 96,000 gallons per day per module. The GEN2 architecture incorporates significant advances in automation, energy optimization, and modular scalability while maintaining the core UV-driven radical chemistry demonstrated at pilot scale.
The system integrates a dimmable UV lamp array that dynamically adjusts its output depending on the incoming PFAS concentration. This adaptive control strategy allows energy consumption to be closely matched to processing demand, supporting operational efficiency in large-scale urban applications where pollutant levels can fluctuate over time.
The GEN2 system is designed for continuous flow-through operation under intended conditions, eliminating the need for recirculation and simplifying hydraulic integration. Modular configurations allow utilities to gradually deploy capacity while scaling throughput as needed, without overbuilding infrastructure. By maintaining compatibility with established treatment trains, the PolyClear™ GEN2 system facilitates integration into existing facilities with minimal disruption to operations.
Through this modular, integration-focused design, Water Illumination is positioning the UV platform not just as a pilot innovation, but as a commercially deployable solution that can address PFAS at a meaningful municipal scale.
Redefining the economics of PFAS compliance
Traditional PFAS treatment approaches often incur recurring costs associated with media replacement, regeneration, and residual waste management. Adsorption-based systems migrate PFAS to spent carbon or ion exchange resins, which must be transported and ultimately incinerated or otherwise disposed of, perpetuating both economic burdens and long-term liability. As regulatory oversight expands, these downstream obligations are becoming an increasingly important component of the overall cost of care.
Water Illumination’s UV-based PolyClear™ platform shifts this economic paradigm. By directly mineralizing PFAS within the treatment reactor, this system reduces reliance on secondary waste treatment and eliminates the need for repeated media exchange cycles. Avoiding resin regeneration, carbon exchange, and hazardous waste logistics over the life of a treatment facility can provide significant cost benefits compared to concentration-based approaches.
Operating without the use of chemical additives further increases operational predictability and simplifies supply chain management. Energy optimization through dynamic ramp modulation ensures that power consumption directly matches treatment demand, supporting cost control in lean municipal systems where energy efficiency is critical.
Importantly, the PolyClear™ platform is adaptable to a variety of water matrices, including groundwater, potable water, reverse osmosis concentrates, wastewater streams, and ion exchange regeneration solutions. This versatility allows water illumination to address both primary treatment and secondary residual streams within a unified UV-based destruction framework. Water illumination solutions are thus positioned not only as an environmental innovation, but also as a practical and economically grounded compliance strategy.
Supporting industry and utilities through an evolving regulatory framework
PFAS regulations are rapidly expanding across multiple jurisdictions, and additional compounds are increasingly proposed for inclusion on future enforcement lists. As the scientific understanding of PFAS toxicity advances, the regulatory framework is expected to expand beyond the limited subset of compounds currently subject to maximum contaminant levels. Therefore, techniques designed solely to capture regulated species today may require repeated modifications and adaptations as standards evolve.
The Water Illumination approach addresses this regulatory uncertainty at its core. By targeting the fundamental carbon and fluorine bonds common to PFAS chemistry, the PolyClear™ platform focuses on bond-level disruption rather than selective removal of individual compounds. This molecular strategy provides utilities and industry with a more resilient compliance pathway, reducing reliance on compound-specific regulatory lists and reducing the risk of future technology obsolescence.
Scalable destruction technologies are becoming central to long-term water management strategies as governments and regulatory agencies increasingly prioritize permanent removal over temporary containment. In this context, Water Illumination’s UV-based solutions align with new regulatory expectations and support utilities in achieving lasting environmental responsibility.
Moving forward toward large-scale implementation
Water illumination has progressed from laboratory research to proven pilot operations and is now moving toward larger-scale demonstrations. Support from multiple government grants and research contracts reflects initial technology validation, while ongoing engineering efforts are focused on preparing for commercialization and accelerating deployment in the field.
The company’s strategy focuses on collaboration with local government and industrial partners to demonstrate scalable UV-based PFAS destruction under real-world operating conditions. By combining validated chemistry, modular engineering, and an integration-focused design, Water Illumination positions the PolyClear™ platform to address PFAS contamination at meaningful operational scale.
As the water sector decisively moves from PFAS removal to permanent destruction, scalable UV technologies that can operate under ambient conditions without the use of chemical additives are expected to play an increasingly central role. Within this evolving landscape, Water Illumination’s PolyClear™ system represents an important step toward enabling technically robust, economically viable, and persistent PFAS destruction across diverse water matrices.
Please note: This is a commercial profile
This article will be published in an upcoming PFAS Special Focus Publication in April.
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