The DoD Success Memo enables government contracting officers to rapidly procure goods and services across all Federal agencies, accelerating deployment of 374Water's AirSCWO technology into the large and growing Federal marketplace.

MORRISVILLE, NC / ACCESS Newswire / August 13, 2026 / 374Water Inc. (NASDAQ:SCWO) ("374Water" or the "Company"), a cleantech and environmental services company deploying supercritical water oxidation ("SCWO") technology for the permanent destruction of PFAS and hazardous organic waste streams, today announced that U.S. Department of Defense ("DoD") Defense Innovation Unit ("DIU") issued a Success Memo to 374Water's demonstration partner, Arcadis, validating the performance of 374Water's AirSCWO™ destruction technology.

The Success Memo formally validates the economic and technical viability of a regional AirSCWO hub following a robust demonstration and evaluation program under the DoD's Environmental Security Technology Certification Program ("ESTCP"). It also designates successful completion of the Prototype Project (HQ0034-20-9-DIU) under 10 U.S.C. §4022 and establishes the conditions under which federal agencies may proceed directly to follow-on production awards.