Claros Technologies Raises $55M for PFAS Destruction

Claros Technologies has closed a $55M Series B to move its PFAS destruction and analytical platform deeper into commercial deployment. Treehouse Family Capital led the financing, with participation from Daikin America, Veralto, Bush Foundation, Nord Asset Management, Saint Paul & Minnesota Foundation, and existing investors. The amount includes Claros's previously announced $10M convertible note.

The Minneapolis company plans to expand manufacturing, product development, customer support, and commercial installations across North America, Europe, and Asia. It will also expand ClarosLabs, hire across engineering and commercial operations, and invest in application development. This is less a fresh science experiment than a mandate to scale.

The market problem is blunt. Capturing PFAS in carbon, membranes, or resin does not necessarily eliminate the compounds; it often transfers them into a concentrated waste stream that still requires an end-of-life solution. Claros is betting that pairing destruction hardware with accredited measurement can turn that cleanup liability into an operating system for manufacturers, remediation firms, utilities, and government agencies.

What Happened

The Series B was announced on July 28, 2026, bringing together financial, industrial, environmental, and water-technology investors. Daikin America is both an investor and a commercialization partner. Veralto operates a portfolio of water-quality technologies, while Treehouse Family Capital is backing the company's next stage of deployment.

Claros did not disclose a valuation, investor check sizes, revenue, or customer count. It also did not restate a cumulative funding total. A previous $10M convertible-note announcement said the company had raised $39M since inception, including grants and investments, but the new $55M figure includes that note. Adding the headline figures together would overstate the amount.

From Capture to Destruction

ClarosTechUV uses an enhanced UV photochemical process designed to break the carbon-fluorine bonds that make PFAS persistent. Claros says the system can operate in batch and high-flow configurations and target long-, short-, and ultra-short-chain compounds. The company positions the technology near concentrated waste streams, where destroying PFAS before or after filtration could reduce the burden of handling contaminated media.

The second half of the platform is measurement. ClarosLabs is an ISO/IEC 17025:2017 accredited analytical laboratory that detects and quantifies PFAS, including short- and ultra-short-chain compounds that can be difficult to capture. The pairing matters because customers need more than treatment equipment. They need defensible evidence showing what entered the system, what left it, and whether targeted compounds were destroyed.

The U.S. Environmental Protection Agency's PFAS technology inventory describes earlier Claros photochemical work that achieved more than 99% destruction across PFAS classes during supported research. The EPA's broader 2026 guidance also stresses that destruction technologies must be evaluated against specific waste streams and remaining scientific uncertainty. That is the appropriate commercial frame: promising evidence followed by the hard work of repeatable deployment.

The Commercial Proof Point

Claros and Daikin reported that a December 2025 commercial optimization run treated more than 170,000 gallons of industrial process water and achieved greater than 99.99% destruction of targeted long-, short-, and ultra-short-chain PFAS. The run followed an earlier pilot at Daikin's Decatur, Alabama, facility and moved the relationship closer to full commercial installation. Those results are company- and partner-reported, but they represent far more than a beaker-scale demonstration.

In April 2026, Claros reported at least 99.99% destruction of targeted PFAS in groundwater remediation work using concentrate derived from approximately one million gallons, or 3.8 million liters, of groundwater. The distinction matters: the company treated a concentrated stream derived from that groundwater volume, not one million gallons directly through the destruction reactor. The result broadens the company's evidence from industrial process water into environmental remediation while keeping the claim in its proper scope.

Why the Investor Mix Matters

Strategic investors can be decorative, or they can provide distribution, validation, and procurement leverage while sitting on the cap table. Daikin's involvement is notable because the company manufactures fluorochemicals and has already provided an industrial environment for ClarosTechUV testing. Veralto brings proximity to water-quality instrumentation and treatment markets, while the foundations in the syndicate add an environmental and regional dimension to the financing.

None of that guarantees adoption. It does, however, align capital with the customers and infrastructure surrounding the problem. PFAS destruction must withstand site engineering, variable water chemistry, uptime requirements, analytical scrutiny, and purchasing cycles. A financing syndicate that understands those constraints can be more valuable than one that only understands a total addressable market slide.

Regulation Is Moving, but Not in One Direction

PFAS demand is often summarized as regulation getting tighter, but the picture is more nuanced. In May 2026, the EPA proposed preserving federal drinking-water limits for PFOA and PFOS while revisiting limits for several other PFAS and giving some systems additional implementation time. The direction still creates measurement and treatment obligations, but operators need precise compliance planning rather than slogans.

Europe is also moving through several layers of restriction. The European Chemicals Agency is evaluating a broad PFAS restriction, while narrower rules covering certain compounds and firefighting foams have already been adopted or are entering into force. At the same time, fluorinated materials remain important in semiconductors, aerospace, healthcare, and other applications. That tension creates an opening for technologies that can address PFAS waste at the source without pretending every use case carries the same risk or requires the same remedy.

What the Round Changes

Founded in 2018 and incubated at the University of Minnesota, Claros has evolved from university science into a combined treatment-and-analysis company. CEO and co-founder Michelle Bellanca has led that commercialization, while co-founders Abdennour Abbas and John Brockgreitens built the technical foundation. Brockgreitens now serves as VP Product Development.

The $55M gives Claros the resources to manufacture systems, support customers, expand analytical capacity, and repeat deployments across multiple geographies. The real test is no longer whether a targeted PFAS result can be achieved once. It is whether Claros can reproduce that result across different sites and feed streams, document it in ways regulators and customers trust, and make the economics work through industrial procurement. That is where environmental technology stops being an impressive demonstration and starts becoming infrastructure.