v3.25.4

Cover	Feb. 04, 2026
Cover [Abstract]
Entity Registrant Name	374WATER INC.
Entity Central Index Key	0000933972
Document Type	8-K/A
Amendment Flag	true
Amendment Description	Amendment.
Entity Emerging Growth Company	false
Document Period End Date	Feb. 04, 2026
Entity File Number	000-27866
Entity Incorporation State Country Code	DE
Entity Tax Identification Number	88-0271109
Entity Address Address Line 1	100 Southcenter Court
Entity Address Address Line 2	Suite 200
Entity Address City Or Town	Morrisville
Entity Address State Or Province	NC
Entity Address Postal Zip Code	27560
City Area Code	440
Local Phone Number	601-9677
Security 12b Title	Common Stock, par value $0.0001
Trading Symbol	SCWO
Security Exchange Name	NASDAQ
Written Communications	false
Soliciting Material	false
Pre Commencement Tender Offer	false
Pre Commencement Issuer Tender Offer	false

Description of changes contained within amended document.

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For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

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The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

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The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

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Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

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374Water Inc. 8-K/A