374Water advances St. Cloud mobile AirSCWO pilot into Phase 3

374Water said its mobile AirSCWO system finished Phase 2 of a Minnesota deployment and has started Phase 3 at the City of St. Cloud’s facility. The pilot is part of the state’s evaluation of AirSCWO for permanent PFAS destruction and could help unlock recurring mobile service revenue.

Why it matters: - The St. Cloud pilot is part of Minnesota’s evaluation of AirSCWO for destroying PFAS-laden waste permanently. - A successful deployment could support future mobile contracts and recurring revenue for 374Water. - The project also tests whether mobile supercritical water oxidation can handle multiple biosolids streams at real-world scale.

What happened: - 374Water completed Phase 2 of its mobile AirSCWO deployment in St. Cloud, Minnesota, and began Phase 3. - The work is being done under a $600,000 Waste Destruction Services contract with the City of St. Cloud. - Barr Engineering is partnering on the campaign at the city’s Nutrient, Energy, and Water Recovery Facility. - The field team finished Phase 2 processing Class A biosolids from a low-temperature thermal hydrolysis process supplied by Lystek International. - The Phase 2 run ended with solids concentrations as high as 12%. - The team completed all planned sampling.

The details: - Phase 2 data analysis is underway, and 374Water said results are tracking with prior AirSCWO campaigns. - Phase 3 is processing pre-anaerobic digestion sludge. - The pre-AD sludge is untreated waste similar to material 374Water has processed in Orlando, Florida. - 374Water said prior Orlando work showed 97% solids reduction and up to 99.99%+ PFAS reduction. - The St. Cloud campaign has already processed multiple biosolids types, with more waste streams expected as the project continues. - The Minnesota effort is supported by the Legislative-Citizen Commission on Minnesota Resources and the state’s Environment and Natural Resources Trust Fund. - 374Water’s mobile system is estimated to generate between $500,000 and $1.5 million in annual revenue per unit, depending on deployment cadence, waste stream mix and contract structure.

Between the lines: - The St. Cloud pilot is serving as a live demonstration of both technical performance and commercial repeatability. - 374Water is trying to show that its mobile system can move to the waste source instead of requiring centralized disposal infrastructure. - The company is also using the campaign to build credibility for follow-on deployments in other end markets. - Brad Meyers, chief operating officer, said the company believes demand for mobile AirSCWO services is real and growing.

What's next: - 374Water will keep reporting Phase 3 performance results as the campaign continues. - The company plans to pursue follow-on mobile deployments to demonstrate broader commercial use of AirSCWO. - A successful pilot could help shape Minnesota’s next steps on permanent PFAS destruction technology. - 374Water said it expects the St. Cloud work to support a scalable mobile services business.