The Department of Defense (DOD) is seeking innovative solutions for an Expeditionary Energy-Efficient Greywater Treatment system designed for operational environments. The objective is to develop a user-friendly system capable of treating greywater from field-generated shower and laundry water to meet TB MED 577 recycled greywater reuse standards, suitable for various applications including personnel decontamination and vehicle washing. This initiative is crucial for enhancing sustainable water management in austere settings, minimizing energy consumption, and reducing logistical burdens associated with traditional treatment methods. The solicitation is set to be released on August 6, 2025, with an open date of August 27, 2025, and a closing date for applications on September 24, 2025. Interested parties can find more information and submit proposals through the DOD SBIR website at https://www.dodsbirsttr.mil/topics-app/.