374Water’s Mobile PFAS Destroyer Shows Early Momentum In Minnesota
374Water (NASDAQ: SCWO) has completed Phase 1 of its mobile AirSCWO pilot at St. Cloud’s Nutrient, Energy, and Water Recovery Facility, with Phase 2 now underway and early results tracking in line with prior successful campaigns. The project targets PFAS‑contaminated biosolids and is supported by Minnesota’s LCCMR program, making it an important commercial and regulatory showcase for the technology.
Pilot overview
The St. Cloud engagement is a roughly $600,000 waste‑destruction services contract that brings a mobile AirSCWO unit on site through mid‑September 2026. Phase 1 focused on Class B biosolids (up to 10% solids), and 374Water reports performance consistent with earlier campaigns, including strong destruction of organics and PFAS reduction toward below‑detection levels.
Phase 2 shifts to Class A Lystek‑treated biosolids, a tougher stream from an operations perspective, and so far the mobile system is running steadily without major issues. Because the unit is mobile, St. Cloud can test advanced PFAS destruction without building permanent infrastructure, a key selling point for municipalities facing tightening regulations.
Technology and business model
AirSCWO leverages supercritical water oxidation to permanently destroy organic waste—including PFAS—while producing dischargeable water, mineral residue, vent gas, and usable heat. Previous projects suggest PFAS in biosolids can be reduced to below instrument detection limits, which aligns well with emerging “forever‑chemical” standards.
The mobile system is designed as a services platform: 374Water bills for waste destruction rather than just selling equipment, creating a recurring revenue profile that can be replicated across sites. Management has indicated that a single mobile unit could generate roughly $500,000 to $1.5 million in annual revenue, depending on utilization and contract mix.
Investor takeaways
For SCWO investors, the St. Cloud pilot is an early real‑world proof point for both technology reliability and the mobile services model. If Minnesota moves from pilot to ongoing operations, 374Water sees potential for “multiple millions” of follow‑on revenue in the state alone, plus a reference case it can use to win additional PFAS‑destruction work nationally.
The broader pipeline of mobile deployments under discussion suggests that 374Water is trying to build a fleet‑style, recurring‑revenue business that complements fixed‑site systems, positioning the company as a specialized PFAS and complex‑waste solution provider rather than a one‑off equipment vendor.
