Statement
NASA reported early estimates of 97–98% water recovered from urine after adding the ISS Brine Processor Assembly in a specific 2023 configuration; that figure is not total habitat-water or total-matter recovery.
Evidence dimensions
- Basis
- demonstrated
- Readiness
- operational
- Confidence
- strong
Assessment rationale
NASA's 2023 technical paper reports early estimates of 97–98 percent water recovered from urine after adding the Brine Processor Assembly. The paper does not report 97–98 percent total habitat-water or total-matter recovery and documents continuing makeup-water and subsystem boundaries.
Citations and locators
- Status of ISS Water Management and Recovery (opens external site in a new tab)
Pages 5–6: Brine Processor Assembly configuration and early 97–98 percent estimate explicitly scoped to water recovered from urine; pages 1–2 and 6–7: broader system and logistics boundaries. · direct demonstration - International Space Station (ISS) Environmental Control and Life Support (ECLS) System Overview of Events 2024-2025 (opens external site in a new tab)
Later operational events showing continuing ECLS maintenance, replacement, mitigation, and material-loss boundaries. · scope boundary - Advanced Life Support Baseline Values and Assumptions Document (opens external site in a new tab)
Broader life-support flow categories and planning assumptions. · limitation
Assumptions and limits
The assessment applies to this bounded statement and the cited source scopes. A source can support one relationship without validating a generation ship, and an editorial grade does not substitute for independent review or representative demonstration.
What would change this conclusion?
Updated NASA operational data, a changed configuration, corrected recovery calculation, or an expanded independently measured boundary would change the numerical or readiness statement.
Editorial record
- Prepared by: GShips Project
- Last reviewed: 2026-07-26
- Review status: substantive editorial review
- Reviewer: GShips Project editorial synthesis
- Independent review: pending two person required
- Conflicts: Publisher intends to explore a commercial venture based on some GShips work.
- High-consequence domains: life-support-continuity