EPA Administrator Lee Zeldin visited Onterris, an environmental engineering firm in Portland, Maine, on Monday to examine patented technology that removes and destroys PFAS compounds from contaminated water streams — a tour that comes as the Trump administration moves to roll back national drinking-water limits for several of the so-called forever chemicals.

The company, formerly known as ECT2, is treating groundwater, municipal drinking water, surface water, and industrial wastewater at sites in Maine and across the United States. Its process centers on ion exchange resins — small polymer beads that capture PFAS molecules as contaminated water passes through large vessels containing millions of them. A regeneration solution then strips the captured compounds from the beads, and both the beads and the solution are cleaned and returned to service rather than disposed of.

"We want to reuse everything to minimize waste and cost," Steve Woodard, Onterris's chief innovation officer, told Zeldin during the demonstration.

That regeneration loop is the operationally significant detail. Conventional PFAS treatment with granular activated carbon produces spent media that requires costly disposal or incineration, transferring the contaminant to another waste stream. Onterris's central regeneration model concentrates the PFAS for elimination while keeping the resin in circulation — a claim Woodard tied directly to economics.

"It's a lot less waste, it's a lot less cost, and it's better for the environment. We are bringing clean water to the American people," Woodard said.

Zeldin also reviewed the company's Foam Fractionation process, branded Foam-X. The method injects air bubbles into contaminated water; PFAS compounds attach to the bubbles and rise to the surface as foam, which operators can then collect. The company reports the process removes roughly 98% of PFAS compounds from the treated stream.

The affordability argument

The visit carried a clear policy subtext. Zeldin told reporters that smaller utilities, particularly in rural systems, cannot bear the capital cost of granular activated carbon installations and are searching for cheaper compliance pathways.

"They can't afford to invest in the more expensive granular activated carbon solutions, and they are looking for cost-effective ways to remediate PFAS," Zeldin said.

That framing aligns with the administration's broader regulatory posture. Under the Safe Drinking Water Act, water utilities face an April 2029 compliance deadline for limits on PFOA and PFOS, the two most common PFAS compounds. The EPA has proposed allowing water systems to request a delay of up to two additional years.

"To grant some water systems across the country the ability to request a delay of up to two more years to come into compliance," Zeldin explained when asked about the proposal.

The agency has also proposed rolling back limits on several additional PFAS compounds, citing procedural and legal defects in the Biden-era rulemaking. Zeldin said that rulemaking process is ongoing, with a decision expected soon.

What it means for the treatment market

For the PFAS remediation sector, the regulatory turbulence cuts both ways. A two-year compliance extension would push capital spending by some utilities beyond 2029, slowing near-term procurement of treatment systems. A rollback of limits on less common compounds would narrow the universe of regulated substances that utilities must remove.

Yet the core mandate for PFOA and PFOS remains on the books with an April 2029 deadline, and thousands of utilities across the country still need treatment capacity they do not currently operate. Technologies that lower operating costs — through media regeneration rather than replacement, or through foam fractionation rather than carbon adsorption — are positioned to compete on lifecycle cost precisely where Zeldin identified the pain point: small and rural systems with limited rate bases.

Onterris, for its part, now has the EPA's top administrator on record touring its Portland facility and acknowledging the cost barrier its processes claim to address. That visibility matters in a market where utilities weigh vendor claims against compliance deadlines and life-cycle economics.

The next milestone is regulatory, not technological. EPA's pending decision on the compliance deadline extension and the rollback of limits for additional PFAS compounds will determine how much treatment capacity utilities must procure, on what timeline, and at what budget. Until that rulemaking lands, vendors and water systems alike are pricing their options against an April 2029 deadline that may — or may not — hold.