On October 21, 2025, 374Water Inc. announced the successful completion of a commercial‑scale field demonstration of its AirSCWO™ 6 system at Clean Earth’s Treatment Storage and Disposal Facility in Detroit, Michigan, as part of a Department of Defense (DoD) Environmental Security Technology Certification Program (ESTCP) and Defense Innovation Unit (DIU) project.
The demonstration ran for six weeks from July through September 2025 and processed six representative concentrated PFAS‑impacted waste streams—including Surface Active Foam Fractionation foamate, Cyclodextrin‑based media regenerant distillate, ion exchange regenerant still bottoms, Aqueous Film‑Forming Foam (AFFF), spent granular activated carbon, and spent ion exchange resin—along with a mixed batch of AFFF, foamate, and Cyclodextrin distillate. In total, the AirSCWO™ 6 unit treated approximately 900 gallons of feedstock over 80 hours of runtime in a series of one‑day trials.
Sampling of stack gas emissions and liquid effluent is underway, and Arcadis, the project’s prime engineering contractor, is assessing performance objectives such as destruction removal efficiencies, fluorine mass balance, and cost modeling. A final report detailing the results is expected to be publicly released by the first quarter of 2026.
Stephen Jones, 374Water’s interim president and CEO, said the deployment “again successfully demonstrated the effectiveness, scalability and versatility of our AirSCWO™ technology” and that the project “served to further validate our technology for a range of most common PFAS‑containing wastes, providing comprehensive emissions and liquid sampling and operational and economic data to support a centralized ‘hub’ deployment model for the DoD.” He added that the company completed the demonstration of the planned six waste streams ahead of schedule, creating an opportunity to add a mixed waste stream for processing.
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