The microplastics piling up in oceans and human bloodstreams may have met an unlikely adversary: a technology inspired by how plants drink.
PolyGone Systems, a five-year-old company operating out of a converted Kearny Point warehouse in New Jersey, announced Tuesday it has raised $4 million in seed funding to scale up filtration systems it claims can strip up to 98% of microplastic particles from water. FYRFLY Venture Partners led the February 18 round, with backing from Tech Council Ventures, Interstate Fusion Ventures, Golden Seeds, and a handful of angel investors. The New Jersey Innovation Evergreen Fund matched $1.65 million—a notable state endorsement for technology that remains largely unproven at commercial scale.
It's an ambitious pitch at a moment when microplastics have moved from environmental footnote to front-page concern. A Columbia University study published in 2024 found an average of 240,000 nanoplastic particles per liter in bottled water, a number that sent shockwaves through public health circles. Scientists have since detected the particles in human blood and placentas, though researchers remain divided on what that means for long-term health.
PolyGone's founders—Nathaniel Banks and Yidian Liu, both Forbes 30 Under 30 honorees who met at what the company describes as "the intersection of bioengineering and optimism"—built their approach around what they call the Artificial Root Filter. The design mimics the structure of plant root systems, using silicone fiber media to passively snag microplastic particles as water flows through. No chemicals. No energy-intensive processing. Just surface chemistry and geometry doing quiet work.
Whether that elegance translates to real-world impact is the question facing any early-stage cleantech venture. PolyGone has logged over 520 million particles captured at a pilot site run by the Atlantic County Utilities Authority, a wastewater treatment facility serving roughly 220,000 residents in southern New Jersey. The authority launched what it bills as the world's first microplastics removal pilot at a municipal wastewater plant in September 2024—a project that earned it a 2026 National Environmental Achievement Award from the National Association of Clean Water Agencies.
But pilots are one thing. Commercial deployment is another entirely.
Scaling Up, Carefully
The fresh capital will go toward manufacturing PolyGone's first commercial-grade PolyPod systems—containerized modules designed to treat up to 10 million gallons of water per day. The company also plans to launch PolyCartridge, an inline filtration product aimed at industrial clients grappling with contaminated process water. Three commercial deployments are slated for 2026, though PolyGone has declined to name customers. Perhaps they're still finalizing contracts. Or perhaps early buyers remain wary of publicity before the technology proves itself at scale.
In a move that suggests the founders understand the need for diversified revenue, PolyGone also launched a microplastics laboratory analysis service offering fluorescence microscopy, FTIR, and pyrolysis GC-MS testing. It's a smart hedge: as municipalities and industrial players face mounting pressure to monitor emerging contaminants, the lab work generates income while the hardware business scales.
The company has been remarkably capital-efficient, by cleantech standards. Prior to this seed round, CB Insights tracked approximately $1.26 million in total funding—though that figure doesn't include $1.9 million PolyGone secured in 2023 from NOAA Sea Grant's Marine Debris Challenge Competition or earlier grants from New Jersey's Pilot Clean Tech Demonstration Grant program. Still, operating on fumes for years while perfecting the technology suggests a team comfortable with risk, or perhaps simply without better options.
Beyond the Jersey Shore
International pilots are already underway, a sign that PolyGone sees opportunity in markets where water quality concerns outpace regulatory frameworks. The company began a six-month trial in Dubai last October, integrating its filter into a decentralized drinking water system operated by Wayout Water Systems. A separate partnership targets deployment at a Red Sea site—part of what Banks and Liu describe as a deliberate strategy to test performance across diverse water chemistries and climates. Saltwater behaves differently than freshwater. Industrial effluent isn't household wastewater. If the filters work everywhere, the market opens up considerably.
The technology itself is elegantly simple, at least in theory. Passive capture rather than chemical treatment means no operational emissions and—according to PolyGone—costs up to 90% lower than competing systems. Captured microplastics get sent to third parties for reprocessing into chemicals or fuels, though the economics of that recycling loop remain murky. The filters themselves can be cleaned and reused, which matters for long-term operating budgets.
What PolyGone doesn't yet have is a proven business model at infrastructure scale. Winning pilots and awards is one thing; persuading municipal water authorities to bet millions on unproven technology is quite another. The company stacked up accolades in 2025—the Cleantech Open U.S. National title in October, an Edison Patent Award for emerging technology in November—but awards don't pay for manufacturing lines or sales teams.
Regulatory Winds (Maybe) at Their Back
The seed round comes as regulatory momentum builds, though "momentum" may overstate things. California implemented the world's first microplastics monitoring framework for drinking water between 2020 and 2022, requiring four years of testing and public reporting. No treatment mandates followed. No federal microplastics standard exists. The regulatory landscape remains somewhere between "emerging concern" and "we'll deal with it later."
Still, public anxiety about microplastics is real and growing. If that anxiety translates into regulation—a big if—companies like PolyGone stand to benefit. The challenge is staying solvent long enough to see that future arrive.
With manufacturing capacity at its Kearny Point headquarters and lab space secured at the New Jersey Bioscience Center, PolyGone now faces the hard part: delivering. The first commercial PolyPod installations need to work as advertised. Industrial clients need to see ROI. Municipal contracts need to materialize beyond early-adopter pilots.
The technology might be inspired by nature, but the business ahead is all too human—a race to prove commercial viability before the capital runs out. Banks and Liu have bought themselves runway. What they do with it will determine whether biomimetic filtration becomes an infrastructure standard or just another promising cleantech idea that couldn't scale.
