374Water (SCWO) Provides Business Update

374Water Inc. (NASDAQ: SCWO) ("374Water") (the "Company"), a global leader in organic waste destruction technology for the municipal, federal, and industrial markets, today provided a business update following the release of a draft risk assessment by the U.S. Environmental Protection Agency (EPA).

The draft risk assessment is a scientific evaluation of the potential human health risks associated with the presence of toxic per- and polyfluoroalkyl substances (PFAS) chemicals in biosolids, also known as sewage sludge. The assessment highlights the possible risk for people posed by land-applied sludge contaminated with PFOA/PFOS.

"374Water is strongly positioned to capitalize on increased demand for PFAS destruction, due in part to the EPA's draft risk assessment," said Chris Gannon, CEO of 374Water. "We believe our AirSCWO solution is the only commercial-scale, continuous flow solution available on the market that can readily address the risks posed by PFAS as outlined in the assessment. We look forward to securing new business with customers at the municipal, federal, and industrial levels, leveraging our technology to eliminate these critical contaminants."

The EPA states that "Traditional wastewater treatment technology does not remove or destroy PFOA or PFOS, and these chemicals typically accumulate in the sewage sludge." Common sources of these chemicals include industrial products such as firefighting foam, leachates, and manufacturing wastes, as well as commercial and household sources such as car washes, waterproofing sprays, washing clothes, and other common products. Treatment facilities then receive this contaminated wastewater. Groundwater and drinking water are then contaminated when sludge from treatment facilities is disposed of on agricultural lands, a practice known as land applying.

The EPA suggests that sludge containing as low as 1 part per billion (ppb) of PFAS when land applied, may pose "human health risks exceeding the EPA's acceptable thresholds." While this draft document does not compel action, it recommends monitoring and careful consideration of alternative management techniques and innovative technologies. The EPA names SCWO as a specific "emerging PFAS destruction technology."

"While strong demand already exists in the municipal market, this draft assessment and the continued scrutiny by the EPA provide additional market tailwinds for 374Water's destruction technology," said Sunny Viswanathan, VP Municipal Sales at 374Water. "AirSCWO provides the solution to the PFAS problem."

This Assessment will inform the EPA's regulatory landscape under the Clean Water Act, with the goal of reducing risks to humans that occur through the management and disposal of sludge from water treatment plants and other sources.

374Water's proprietary AirSCWO technology provides a compelling solution that can transform residuals into distilled water, minerals, and recoverable heat while destroying contaminants of concern like PFAS. Additionally, SCWO can be operated autothermally, requires a small footprint, and can be easily integrated into existing treatment plant infrastructure. For industrial waste management, on-site installation of AirSCWO reduces hauling costs and reliance on contracts, giving manufacturers ownership and flexibility to their waste disposal practice.

374Water is developing AirSCWO Systems to meet the various destruction capacity needs of the Municipal, Federal and Industrial markets. The Company is currently focused on developing and eventually commercializing its various sizes of commercial systems, which range from 1 metric ton/day (0.25 to 0.5 MGD WW facility) up to 100 metric ton/day (20 to 40 MGD WW facility).

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