Can Tacoma Crack the PFAS Code?

Inside a wastewater plant in Tacoma, Washington, an experiment is under way that could alter how America deals with “forever chemicals”. For decades utilities have focused on capturing per- and polyfluoroalkyl substances (PFAS) and sending the concentrated waste elsewhere. Now one city is testing whether those chemicals can be destroyed where they are found.

Aquagga, a treatment-technology firm, has launched its first municipal-scale PFAS destruction project at the Tacoma Central Wastewater Treatment Plant. The effort moves beyond laboratory trials and small pilots into the messy reality of an operating facility. That shift matters. It is one thing to break chemical bonds in controlled conditions; it is another to do so reliably in a public utility bound by permits, budgets and public scrutiny.

The timing is not accidental. In 2024, the Environmental Protection Agency finalised new limits on PFAS in drinking water. Utilities across the country are now weighing how to comply with tighter standards while facing rising costs and legal risks. Simply filtering out PFAS and shipping the waste to landfills or incinerators looks increasingly like a holding strategy. It transfers liability rather than erasing it.

Tacoma’s approach combines two steps in one place. ECT2, another firm, concentrates PFAS from water streams. Aquagga’s high-temperature system then aims to break the chemicals’ strong molecular bonds, converting them into benign components. In theory, integrating removal and destruction reduces transport risks and long-term exposure to regulatory change. It also gives municipalities more control over their waste streams.

Yet promise is not proof. On-site destruction must show consistent performance, manageable energy use and compliance with evolving rules. Permitting frameworks, designed largely for separation and disposal, may need to adapt. And federal infrastructure funds now flowing to “emerging contaminants” will attract competing technologies, each claiming durability and certainty.

Scepticism about traditional disposal methods, particularly incineration, has sharpened interest in approaches that claim to close the loop. Still, utilities are cautious institutions. They prize reliability over novelty.

Tacoma’s project will not, on its own, inaugurate a new era. But it offers a test of whether cities can move from shuffling PFAS around to eliminating them. If it succeeds, regulators and ratepayers alike may begin to expect nothing less.