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Cover
Jun. 11, 2025
Cover [Abstract]  
Entity Registrant Name 374WATER INC.
Entity Central Index Key 0000933972
Document Type 8-K
Amendment Flag false
Current Fiscal Year End Date --12-31
Entity Emerging Growth Company false
Document Period End Date Jun. 11, 2025
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
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Local Phone Number 601-9677
Security 12b Title Common Stock, par value $0.0001
Trading Symbol SCWO
Security Exchange Name NASDAQ