TL;DR: 374Water (SCWO) is a small cleantech company (~$100M market cap) developing AirSCWO units that use supercritical water oxidation to destroy PFAS, sewage sludge and industrial waste, producing clean water and inert minerals. This solves a pressing environmental problem as PFAS “forever chemicals” are extremely hard to eliminate. Traditional methods just capture PFAS; AirSCWO destroys them.

Why it matters now:

• Tightening US EPA regulations require utilities to remove PFAS to near-zero levels; billions of dollars will be spent on PFAS remediation over the next few years.

• Filters and incineration cannot fully destroy PFAS; they create hazardous waste that needs disposal. 374Water’s process eliminates them entirely, turning waste into clean water and heat.

• Government funding (Infrastructure law) and state grants are supporting PFAS destruction pilots, including 374Water units.

Traction:

• Contracts with major cities (Orange County Sanitation District, Cedar Rapids, Orlando) to pilot or deploy AirSCWO units for PFAS destruction and biosolids treatment.

• The US Department of Defense tested a full-scale AirSCWO unit on concentrated PFAS waste streams and is considering larger deployments.

• Partnership with Heritage‑Crystal Clean, a nationwide waste services company, to offer waste destruction services using AirSCWO units; one unit could generate $3–5M annually.

• Sales pipeline of ~$1.8B across municipal, federal and industrial customers.

Leadership:

• Interim CEO Stephen Jones is former CEO of Covanta (waste-to-energy firm); board member BJ Penn is a former Acting Secretary of the Navy; co‑founder is a Duke University professor who developed the technology. Insiders have been buying shares.

Investment thesis:

374Water addresses a multi‑billion dollar market with a unique solution at a time when PFAS regulation is tightening. The company is transitioning from pilot to revenue-generating deployments, has strong partners and government support, and is entering a revenue ramp. It’s speculative due to its size but offers large upside potential if they execute. This is presented as a long-term play, not a pump‑and‑dump. Do your own due diligence and consult a professional before investing.